{"id":29,"date":"2022-06-14T17:57:28","date_gmt":"2022-06-14T17:57:28","guid":{"rendered":"https:\/\/cnhp.colostate.edu\/rareplant\/?page_id=29"},"modified":"2023-11-02T14:51:53","modified_gmt":"2023-11-02T20:51:53","slug":"references","status":"publish","type":"page","link":"https:\/\/cnhp.colostate.edu\/rareplant\/references\/","title":{"rendered":"References"},"content":{"rendered":"\n\n\t<p>References used in the 1997 profiles.\u00a0 Additional references are also listed at the end of each species profile.<\/p>\n\t<ul><li><p>| <a href=\"#A\">A<\/a> | <a href=\"#B\">B<\/a> | <a href=\"#C\">C<\/a> | <a href=\"#D\">D<\/a> | <a href=\"#E\">E<\/a> | <a href=\"#F\">F<\/a> | <a href=\"#G\">G<\/a> | <a href=\"#H\">H<\/a>  | <a href=\"#I\">I<\/a> | J | <a href=\"#K\">K<\/a> | <a href=\"#L\">L<\/a> | <a href=\"#M\">M<\/a> | <a href=\"#N\">N<\/a> | <a href=\"#O\">O<\/a> | <a href=\"#P\">P<\/a> | Q | <a href=\"#R\">R<\/a>  | <a href=\"#S\">S<\/a> | T | <a href=\"#U\">U<\/a> | <a href=\"#V\">V<\/a> | <a href=\"#W\">W<\/a> | X | Y | <a href=\"#Z\">Z<\/a> |<\/p><\/li> <br \/><li><a name=\"A\"><\/a><\/li>\n<li><p><a name=\"A\"><\/a><\/p><\/li>\n\t<a name=\"A\"><strong>A<\/strong><\/a>\n<\/ul><ul>\n    <li> Allphin, L. 1991. Survey of Grand Gulch Primitive Area for Erigeron kachinensis.\n        Unpublished report prepared for the Colorado Natural Areas Program, Denver, CO.<\/li>\n    <li>Anderson, J.L. 1988a. Status report for Ipomopsis polyantha var. polyantha. Unpublished\n        report prepared for the U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Anderson, J.L. 1988b. Status report for Lesquerella pruinosa. Unpublished report\n        prepared for the U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Anderson, J.L. and J.M. Porter. 1994. Astragalus tortipes (Fabaceae), a new species\n        from desert badlands in southwestern Colorado and its phylogenetic relationships\n        within Astragalus. Systematic Botany 19(1): 116-125.<\/li>\n    <li>Arft, A.M. and T.A. Ranker. 1992. Population genetics and phylogenetic systematics\n        of the rare orchid Spiranthes diluvialis: implications for conservation. In: Proceedings\n        of the Southwestern Rare and Endangered Plants Conference, Santa Fe, NM.<\/li>\n    <li>Argus, G.W. 1973. The genus Salix in Alaska and the Yukon. National Museum of Natural\n        Sciences Publications in Botany, No. 2. Ottawa, Canada.<\/li>\n    <li>Atwood, D.N., J. Holland, R. Bolander, B. Franklin, D.E. House, L.<\/li>\n    <li>Armstrong, K. Thorne, and L. England. 1991. Utah Threatened, Endangered, and Sensitive\n        Plant Field Guide. U.S. Forest Service Intermountain Region, National Park Service,\n        Bureau of Land Management, Utah Natural Heritage Program, U.S. Fish and Wildlife\n        Service, Environmental Protection Agency, Navajo Nation, and Skull Valley Goshute\n        Tribe.<\/li>\n    <a name=\"B\"><strong>B<\/strong><\/a>\n    <\/ul><ul>\n    <li>Baird, V.B. 1942. Wild Violets of North America. University of California Press,\n        Berkeley, CA.<\/li>\n    <li>Barneby, R.C. 1947. A new monocephalous Parthenium. Leaflets of Western Botany 5:19-20.<\/li>\n    <li>Barneby, R.C. 1964. Atlas of North American Astragalus. Memoirs New York Botanical\n        Garden Vol. 13, Bronx, NY.<\/li>\n    <li>Barneby, R.C. and S.L. Welsh. 1985. New species of Astragalus (Leguminosae) from\n        southeastern Utah. Great Basin Naturalist 45(3):551-552.<\/li>\n    <li>Barneby, R.C. 1989. Fabales, Vol. 3, Part B. Fables. In: A. Cronquist, A.H. Holmgren,\n        N.H. Holmgren, J.L. Reveal and P.K. Holmgren. Vascular Plants of the Intermountain\n        West, U.S.A. New York Botanical Garden, Bronx, NY.<\/li>\n    <li>Benson. L. 1966. A revision of Sclerocactus. Cactus and Succulent Journal of America\n        38:54-55.<\/li>\n    <li>Boissevain, C. and C. Davidson. 1940. Colorado Cacti: An Illustrated Guide Describing\n        All of the Native Colorado Cacti. Abbey Garden Press, Pasadena, CA.<\/li>\n    <li>Brainerd, E. 1921. Violets of North America. Free Press Printing Company, Burlington,\n        VT.<\/li>\n    <li>Braun, R.P. 1988. Inventory of Astragalus ripleyi on the Carson National Forest.\n        Unpublished report prepared for the U.S. Forest Service.<\/li>\n    <li>Britton, N.L. 1901. Manual of the Flora of the Northern States and Canada. Henry\n        Holt and Co., New York, NY.<\/li>\n    <li>Brown, G. 1995. Personal communication with the Colorado Natural Heritage Program\n        regarding O\u00f6nopsis puebloensis. University of Wyoming, Laramie, WY.<\/li>\n    <li>Brunsfeld, S.J. and F.D. Johnson. 1985. Field Guide to the Willows of East-central\n        Idaho. Forest, Wildlife and Range Experiment Station. University of Idaho, Moscow,\n        ID.<\/li>\n    <li>Buckner, D.L. and J.E. Bunin. 1992. Final report: 1990\/91 status report for Penstemon\n        harringtonii. Unpublished report prepared for the Colorado Natural Areas Program,\n        Denver, CO by Esco Associates, Inc., Boulder, CO.<\/li>\n    <li>Bunin, J.E. 1991a. Status report for Astragalus wetherilli. Unpublished report prepared\n        for the Colorado Natural Areas Program by Natural Science Association, Inc., Boulder,\n        CO.<\/li>\n    <li>Bunin, J.E. 1991b. Status report for Lomatium concinnum. Unpublished report prepared\n        for the U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Bureau of Land Management. 1990a. Colorado fish and wildlife 2000, a plan for the\n        decade.<\/li>\n    <li>Bureau of Land Management. 1990b. Osterhout milkvetch inventory. Unpublished report\n        prepared by Western Resource Development, Boulder, CO.<\/li>\n    <li>Bureau of Land Management. 1995. Endangered, Threatened and Sensitive Plant Field\n        Guide, Farmington District, New Mexico. Prepared by Ecosphere Environmental Services,\n        Inc., Farmington, NM.<\/li>\n    <li>Burt, J. and S. Spackman. 1995. Status report for Phacelia submutica. Unpublished\n        report prepared for U.S. Fish and Wildlife Service, Golden, CO. by the Colorado\n        Natural Heritage Program, Fort Collins, CO.<\/li>\n    <li>Caddis-Burrell, K. 1989. Letter to Colorado Program of The Nature Conservancy regarding\n        Penstemon cyathophorus.<\/li>\n    <a name=\"C\"><strong>C<\/strong><\/a>\n    <\/ul><ul>\n    <li>Carter, J.L. 1988. Trees and Shrubs of Colorado. Johnson Books, Boulder, CO.<\/li>\n    <li>Cholewa, A.F. and D.M. Henderson. 1984. Biosystematics of Sisyrinchium section Bermudiana\n        (Iridaceae) of the Rocky Mountains. Brittonia 36:342-363.<\/li>\n    <li>Coffin, B. and L. Pfannmuller. 1988. Minnesota&#8217;s Endangered Flora and Fauna. University\n        of Minnesota Press, St. Paul, MN.<\/li>\n    <li>Coles, J. 1990. Status report for Mentzelia densa. Unpublished report prepared for\n        U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Colorado Native Plant Society. 1989. Rare plants of Colorado. Colorado Native Plant\n        Society, in cooperation with the Rocky Mountain Nature Association, Estes Park,\n        CO.<\/li>\n    <li>Colorado Natural Heritage Program. 1996. Rare and imperiled animals, plants, and\n        natural communities. Vol. 2(1). Fort Collins, CO.<\/li>\n    <li>Cooper, D.J. 1990. Ecology of wetlands in Big Meadows, Rocky Mountain National Park,\n        Colorado. Biological report 90(15). Unpublished report prepared for the U.S. Fish\n        and Wildlife Service, Golden, CO.<\/li>\n    <li>Coyner, J. 1990. Report for population study: Spiranthes diluvialis. University\n        of Utah, Salt Lake City, UT. Unpublished report prepared for the Colorado Natural\n        Areas Program, Denver, CO.<\/li>\n    <li>Cronquist, A., A.H. Holmgren, N.H. Holmgren, J.L. Reveal and P.K. Holmgren. 1977.\n        Intermountain Flora Vascular Plants of the Intermountain West, U.S.A: Vol. 6. New\n        York Botanical Garden, Bronx, NY.<\/li>\n    <li>Cronquist, A., A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren. 1984.\n        Intermountain Flora Vascular Plants of the Intermountain West, U.S.A: Vol. 4. New\n        York Botanical Garden, Bronx, NY.<\/li>\n    <li>Cronquist, A., A.H. Holmgren, N.H. Holmgren, J.L. Reveal, P.K. Holmgren. 1994. Intermountain\n        Flora Vascular Plants of the Intermountain West, U.S.A: Vol. 5. New York Botanical\n        Garden, Bronx, NY.<\/li>\n    <li>Cully, A.C. 1985. Status report on Atriplex pleiantha. Unpublished report prepared\n        for the U.S. Fish and Wildlife Service, Albuquerque, NM.<\/li>\n    <li>Culver, D., M. March, S. Kettler, and C. Pague. 1996. Natural Heritage inventory\n        of significant animals and plants and classification of riparian plant associations;\n        Timpas grazing district and Kim grazing association. Unpublished report prepared\n        for the U.S. Forest Service, Pike and San Isabel National Forests by the Colorado\n        Natural Heritage Program, Fort Collins, CO.<\/li>\n        <a name=\"D\"><strong>D<\/strong><\/a>\n    <\/ul><ul>\n    <li>Dorn, R.D. 1975. A systematic study of Salix section Cordatae in North America.\n        Canadian Journal of Botany 53:1491-1522.<\/li>\n    <li>Dorn, R.D. 1977. Willows of the Rocky Mountain states. Rhodora 79:390- 429.<\/li>\n    <li>Dorn, R.D. 1982. A new species of Penstemon (Scrophulariaceae) from Wyoming. Brittonia\n        34(3):334-335.<\/li>\n    <li>Dorn, R.D. 1990. Report on the status of Penstemon gibbensii, candidate threatened\n        species. Unpublished.<\/li>\n    <li>Dorn, R.D. 1992. Vascular Plants of Wyoming. Mountain West Publishing, Cheyenne,\n        WY.<\/li>\n    <li>Douglas, P. 1992. Vascular flora of the Conejos River Basin, San Juan Mountains,\n        Conejos County, Colorado. Colorado State University, Fort Collins, CO. Unpublished\n        thesis.<\/li>\n    <a name=\"E\"><strong>E<\/strong><\/a>\n    <\/ul><ul>\n    <li>England, J.L. 1982. A new species of Penstemon (Scophulariaceae) from the Unita\n        Basin of Utah and Colorado. Great Basin Naturalist 42(3):367-368.<\/li>\n    <a name=\"F\"><strong>F<\/strong><\/a>\n    <\/ul><ul>\n    <li>Fertig, W. 1993. Field Survey for Cleome multicaulis, Cymopterus williamsii, and\n        Sullivantia hapemanii in north central Wyoming. Unpublished report prepared for\n        the Bureau of Land Management, Casper, WY by Wyoming Natural Diversity Database,\n        Laramie, WY.<\/li>\n    <li>Fertig, W. 1994a. Status report on Gaura neomexicana ssp. coloradensis, a candidate\n        threatened species. Unpublished report prepared for the U.S. Fish and Wildlife Service\n        by the Wyoming Natural Diversity Database, Laramie, WY.<\/li>\n    <li>Fertig, W. 1994b. Wyoming Rare Plant Field Guide. The Wyoming Natural Diversity\n        Database, Laramie, WY.<\/li>\n    <li>Fletcher, R., B. Isaacs, P. Knight, W. Martin, D. Sabo, R. Spellenberg, and T. Todsen.\n        1984. A Handbook of Rare and Endemic Plants of New Mexico. University of New Mexico\n        Press, Albuquerque, NM. Flora of North America Editorial Committee. 1993. Flora\n        of North America North of Mexico: Vol. 2. Oxford University Press, NY.<\/li>\n    <li>Floyd, S. 1995. Survey for Gaura neomexicana ssp. coloradensis (Colorado butterfly\n        plant) on Meadow Springs Ranch. Unpublished report prepared for the City of Fort\n        Collins, CO. by the Colorado Natural Heritage Program, Fort Collins, CO.<\/li>\n    <li>Foote, P.W. 1989. Germination studies in Atriplex pleiantha. Department of Agronomy\n        and Horticulture, Colorado State University, Ft. Collins, CO. Unpublished thesis.<\/li>\n<\/ul>\n\t<a name=\"G\"><strong>G<\/strong><\/a>\n    <ul>\n    <li>Galatowitsch, S. 1985. Plant Species of Special Concern for Colorado. Unpublished\n        report prepared for the Colorado Natural Areas Program, Denver, CO.<\/li>\n    <li>Galatowitsch, S. and S.L. O&#8217;Kane. 1985. Plant species of special concern: Penstemon\n        grahamii. Unpublished report prepared for the Colorado Natural Areas Program, Denver,\n        CO.<\/li>\n    <li>Gillett, J.M. 1957. A revision of the North American species of Gentianella. Annals\n        of the Missouri Botanical Garden 44:195-249.<\/li>\n    <li>Goodrich, S. 1986. Utah Flora: Apiaceae. Great Basin Naturalist 46(1).<\/li>\n    <li>Goodrich, S. and E. Neese. 1986. Uinta Basin Flora. U.S.D.A. Forest Service, Ogden,\n        UT.<\/li>\n    <li>Graff, D. 1992. Status report for Cleome multicaulis on Blanca wetlands. Unpublished\n        report prepared for the Bureau of Land Management, Alamosa, CO.<\/li>\n    <li>Graham, E.H. 1937. Botanical studies in the Uinta Basin of Utah and Colorado. Annals\n        of the Carnegie Museum 26:28-432.<\/li>\n    <li>Grant, V. and D.H. Wilken. 1986. Taxonomy of the Ipomopsis aggregata group (Polemoniaceae).\n        Botanical Gazette Sept.:359-371.<\/li>\n    <li>Great Plains Flora Association. 1986. Flora of the Great Plains. University Press\n        of Kansas, Lawrence, KS.<\/li>\n   <a name=\"H\"><strong>H<\/strong><\/a>\n    <\/ul><ul>\n    <li>Haber, E. 1987. Variability, distribution, and systematics of Pyrola picta (Ericaceae)\n        in western North America. Systematic Botany 12(2):324-335.<\/li>\n    <li>Hall, H.M. 1928. The genus Haplopappus: a phylogenetic study in the Compositae.\n        Carnegie Institution of Washington, Washington D.C., Publication 389:391.<\/li>\n    <li>Halse, R.R. 1981. Taxonomy of Phacelia sect. Miltitzia (Hydrophyllaceae). Madro\u00f1o\n        28(3):121-132.<\/li>\n    <li>Harrington, H.D. 1950. Colorado Ferns and Fern Allies. Colorado Agricultural Research\n        Foundation, Fort Collins, CO.<\/li>\n    <li>Harrington, H.D. 1954. Manual of the Plants of Colorado. Sage Books, Denver, CO.<\/li>\n    <li>Harris, J.G. 1985. A revision of the genus Braya (Cruciferae) in North America.\n        University of Alberta, Edmonton, Alberta, Canada. Unpublished dissertation.<\/li>\n    <li>Hartman, R.L. 1992. Report on the status of Sisyrinchium pallidum, a candidate threatened\n        species. Unpublished.<\/li>\n    <li>Hartman, R.L. 1994. Personal communication with Colorado Natural Heritage Program\n        regarding Aletes eastwoodiae.<\/li>\n    <li>Haufler, C.H. and M.D. Windham. 1991. New Species of North American Cystopteris\n        and Polypodium, with comments on their reticulate relationships. American Fern Journal\n        81(1):7-23.<\/li>\n    <li>Heil, K.D. 1984. Recovery plan for the Mesa Verde cactus; Sclerocactus mesae-verdae.\n        Unpublished report prepared for the U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Heil, K.D. 1985. Knowlton cactus (Pediocactus knowltonii) recovery plan. Unpublished\n        report prepared for the U.S. Fish and Wildlife Service, Albuquerque, NM.<\/li>\n    <li>Heil, K.D. and J.M. Porter. 1990. Status report for Astragalus microcymbus. Unpublished\n        report prepared for the U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Hermann, F.J. 1970. Manual of the Carices of the Rocky Mountains and Colorado Basin.\n        U.S.D.A. Forest Service Agriculture Handbook No. 374.<\/li>\n    <li>Hessl, A. and S. Spackman. 1995. Effects of Fire on Threatened and Endangered Plants:\n        An Annotated Bibliography. U.S. Fish and Wildlife Service, Washington, D.C.<\/li>\n    <li>Higgins, L.C. 1971. A revision of Cryptantha subgenus oreocarya. Brigham Young University\n        Science Bulletin, 13:1-63.<\/li>\n    <li>Hitchcock, C.L. 1941. A revision of the Drabas of Western North America. University\n        of Washington Publications in Biology 11:1-132.<\/li>\n    <li>Hitchcock, C.L. and A. Cronquist. 1973. Flora of the Pacific Northwest. University\n        of Washington Press, Seattle, WA.<\/li>\n    <li>Hitchcock, C.L., A. Cronquist, and M. Ownbey. 1969. Pt.1: Vascular Cryptogams, Gymnosperms,\n        and Monocotyledons. In: C.L.<\/li>\n    <li>Hitchcock, A. Cronquist, M. Ownbey, and J.W. Thompson. Vascular Plants of the Pacific\n        Northwest. University of Washington Publications Biology 17(1).<\/li>\n    <li>Hult\u00e9n, E. 1968. Flora of Alaska and Neighboring Territories. Stanford University\n        Press, Stanford, CA.<\/li>\n    <a name=\"I\"><strong>I<\/strong><\/a>\n    <\/ul><ul>\n    <li>Iltis, H.H. 1958. Studies in the Capparidaceae-V. Capparids of New Mexico. The Southwestern\n        Naturalist 3:133-144.<\/li>\n    <a name=\"J\"><strong>J<\/strong><\/a>\n    <\/ul><ul>\n    <li>Jennings, W.F. 1988. The search for orchids. Colorado Native Plant Society. Aquilegia\n        12(4):7.<\/li>\n    <li>Jennings, W.F. 1989. Final report for Eustoma grandiflorum, Spiranthes diluvialis,\n        Malaxis brachypoda, Hypoxis hirsuta, Physaria bellii, and Aletes humilis. Unpublished\n        report prepared for The Nature Conservancy, Boulder, CO.<\/li>\n    <li>Jennings, W.F. 1990a. Final report for Spiranthes diluvialis and Sisyrinchium pallidum.\n        Unpublished report prepared for The Nature Conservancy, Boulder, CO.<\/li>\n    <li>Jennings, W.F. 1990b. Status report on four plants considered rare in Colorado:\n        Aletes humilis, Platanthera sparsiflora, Listera borealis, and Listera convallarioides.\n        Unpublished report prepared for the U.S. Forest Service.<\/li>\n    <li>Jennings, W.F. 1991. Status report on four plants considered rare in Colorado: Cypripedium\n        fasiculatum, Lilium philadelphicum, Pyrola picta, and Goodyera repens. Unpublished\n        report prepared for U.S. Forest Service.<\/li>\n    <li>Johnston, B.C. 1979. Status information for Astragalus microcymbus and Cryptantha\n        aperta. U.S. Forest Service Summary Sheet.<\/li>\n    <li>Johnston, B.C. 1980. Studies of population variability leading to a new classification\n        of Potentilla sect. Multijugae (Rosaceae). University of Colorado, Boulder, CO.\n        Unpublished thesis.<\/li>\n    <li>Johnston, B.C. and L. Hendzel. 1981. Revision of status report on Ptilagrostis porteri.\n        Unpublished report prepared for the U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Johnston, B.C., J.S. Peterson and W. Harmon. 1981a. Status report for Eriogonum\n        brandegei. Unpublished report prepared for U.S. Fish and Wildlife Service, Golden,\n        CO.<\/li>\n    <li>Johnston, B.C., J.S. Peterson and W. Harmon. 1981b. Status report for Ipomopsis\n        globularis. Unpublished report prepared for U.S. Fish and Wildlife Service, Golden,\n        CO.<\/li>\n    <a name=\"K\"><strong>K<\/strong><\/a>\n    <\/ul><ul>\n    <li>Kartesz, J.T. 1994. A Synonymized Checklist of the Vascular Flora of the United\n        States, Canada, and Greenland (second edition). Timber Press, Inc., Portland, OR.<\/li>\n    <li>Keck, D.D. 1938. Studies in Penstemon VI sect. Aurator. Bulletin of the Torrey Botanical\n        Club 65:233-255.<\/li>\n    <li>Kelso, S., K. Heckmann, J. Lawton, and G. Maentz. 1995. The ecology and distribution\n        of Oxybaphus rotundifolius and Penstemon versicolor: geobotany and endemism in the\n        Arkansas Valley, CO. Unpublished report prepared for the Colorado Natural Areas\n        Program, Denver, CO. and Colorado Native Plant Society.<\/li>\n    <li>Kettler, S.M., N.D. Lederer, D. Bacher, and S. Spackman. 1993. Pike and San Isabel\n        National Forest and Comanche and Cimarron National Grasslands Plants of Special\n        Concern. Unpublished report prepared for the U.S. Forest Service.<\/li>\n    <li>Knight, P.J. 1981a. Rare, threatened, endangered and other plants of concern to\n        the Bureau of Land Management. Unpublished report.<\/li>\n    <li>Knight, P.J. 1981b. Status report for Astragalus humillimus. Unpublished report\n        prepared for the New Mexico Department of Natural Resources Heritage Program, Santa\n        Fe, NM.<\/li>\n    <li>Knight, P.J. 1981c. Status report for Sclerocactus mesae-verdae. Unpublished report\n        prepared for the New Mexico Department of Natural Resources Heritage Program, Santa\n        Fe, NM.<\/li>\n    <li>Knight, P.J. 1989. 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Genetic variation in Aletes acaulis and its\n        relative, the narrow endemic A. humilis (Apiaceae). American Journal of Botany 80(5):598-605.<\/li>\n    <li>Locklear, J.H. 1989. Status of Ambrosia linearis in Colorado. Unpublished report\n        prepared for the U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Locklear, J.H. 1990. A Colorado specialty: Ambrosia linearis. Colorado Native Plant\n        Society. Aquilegia 14(5):10.<\/li>\n    <li>Locklear, J.H. 1991. Status of Asclepias uncialis in eastern Colorado and northeastern\n        New Mexico. Unpublished report prepared for The Nature Conservancy Colorado Field\n        Office, Boulder, CO.<\/li>\n    <li>Locklear, J.H. 1996. The biology, ecology, and conservation needs of Asclepias uncialis\n        in Colorado. Unpublished report prepared for the Colorado Natural Areas Program,\n        Denver, CO.<\/li>\n<\/ul>\n\t<a name=\"M\"><strong>M<\/strong><\/a>\n    <ul>\n    <li>Mackenzie, K.K. 1940. 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Unpublished report prepared for the\n        National Park Service, Denver, CO.<\/li>\n    <li>Naumann, T.S. 1990b. Status report for Astragalus ripleyi. Unpublished report prepared\n        for U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Naumann, T.S. 1990c. Status report for Oxybaphus rotundifolius. Unpublished report\n        prepared for U.S. Fish and Wildlife, Golden, CO.<\/li>\n    <li>Naumann, T.S. 1991. Status report for Frasera coloradensis. Unpublished report prepared\n        for U.S. Fish and Wildlife, Golden, CO.<\/li>\n    <li>Neely, E.E. 1987. Astragalus humillimus inventory. Unpublished report prepared for\n        the Colorado Natural Areas Program, Denver, CO.<\/li>\n    <li>Neese, E.C. 1986. New taxa and nomenclatural changes in Utah Penstemon (Scrophulariaceae).\n        Great Basin Naturalist 46(3):459-460.<\/li>\n    <li>Nelson, A. 1902. Chenopodium cycloides. In: Contributions from the Rocky Mountain\n        Herbarium IV. 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A new species of Erigeron (Asteraceae: Astereae) from Colorado.\n        Madro\u00f1o 37(3):184-189.<\/li>\n    <li>O&#8217;Kane, S.L. and J.L. Anderson. 1987. Penstemon debilis (Scrophulariaceae): a new\n        species from Colorado endemic to oil shale. Brittonia 39(4):412-416.<\/li>\n    <li>O&#8217;Kane, S.L., D.H. Wilken, and R.L. Hartman. 1988. Noteworthy Collections. Madro\u00f1o\n        35(1):72-74.<\/li>\n    <li>Olwell, P. 1986. The Knowlton cactus. Audubon Wildlife Report, National Audubon\n        Society: 943-949.<\/li>\n    <li>Olwell, P. and A. Schull. 1985. Endangered and threatened wildlife and plants; final\n        rule to determine Astragalus humillimus to be endangered. Federal Register 50(124):26568-26572.<\/li>\n    <li>Osterhout, G. 1928. Astragalus linifolius. Bulletin of the Torrey Botanical Club\n        55:75.<\/li>\n    <a name=\"P\"><strong>P<\/strong><\/a>\n    <\/ul><ul>\n    <li>Pavlick, L.E. and J. Looman. 1984. Taxonomy and nomenclature of rough fescues, Festuca\n        altaica, F. campestris, and F. hallii, in Canada and the adjacent United States.\n        Canadian Journal of Botany 62(8):1739-1749.<\/li>\n    <li>Payson, E.B. 1915. New and noteworthy plants from southwestern Colorado. Botanical\n        Gazette 60:374-376.<\/li>\n    <li>Payson, E.B. 1922. Species of Sisymbrium native to America north of Mexico. University\n        of Wyoming Publications in Science, Botany 1(1):1-27.<\/li>\n    <li>Penland, C.W.T. 1958. Two new species of Penstemon in Colorado. Madro\u00f1o 14:153-160.<\/li>\n    <li>Pennell, F.W. 1920. Scrophulariaceae of the central Rocky Mountain States. Contributions\n        from the National Herbarium 20:313-381.<\/li>\n    <li>Peterson, J.S. 1981a. Status report on Astragalus deterior. Unpublished report prepared\n        for U.S. Fish and Wildlife Service, Golden, CO.<\/li>\n    <li>Peterson, J.S. 1981b. Status report on Astragalus schmolliae. 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Contributions from the U.S. National Herbarium\n        16:109-196.<\/li>\n    <a name=\"Z\"><strong>Z<\/strong><\/a>\n    <\/ul><ul>\n    <li>Zwinger, A.H. and B.E. Willard. 1972. Land Above the Trees: A Guide to American\n        Alpine Tundra. University of Arizona Press, Tucson, AZ. <\/li>\n<\/ul>\n\n","protected":false},"excerpt":{"rendered":"<p>References used in the 1997 profiles.\u00a0 Additional references are also listed at the end of each species profile. 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