The pollination ecology of co-occuring geographically restricted and widespread species of Astragalus (Fabaceae)

Barneby, 1964, Atlas of North American Astragalus, Mem. N.Y. Bot. Gard., 13, 1

Beattie, 1971, Pollination mechanisms in Viola, New Phytol., 70, 343, 10.1111/j.1469-8137.1971.tb02533.x

Brooks, 1983, Systematics and bionomics of Anthophora: the Bomboides group and species groups of the New World

Byron, 1980, On the ecology and systematics of Coloradan bumblebees

Drury, 1974, Rare species, Biol. Conserv., 6, 162, 10.1016/0006-3207(74)90061-5

Drury, 1980, Rare species of plants, Rhodora, 82, 3

Green, 1975, The pollination ecology of Astragalus cibarius and Astragalus utahensis (Leguminosae), Am. J. Bot., 62, 379, 10.2307/2442091

Griggs, 1983, Conservation of vernal pool plants in California, II. Population biology of a rare and unique grass genus Orcuttia, Biol. Conserv., 27, 171, 10.1016/0006-3207(83)90087-3

Groves, 1982, Changing directions in research on Australian rare plants, 175

Harper, 1979, Some reproductive and life history characteristics of rare plants and implications of management, 3, 129

Heinrich, 1975, The role of energetics in bumblebee-flower-interactions, 141

Heinrich, 1976, Foraging specializations of individual bumblebees, Ecol. Monogr., 46, 105, 10.2307/1942246

Heinrich, 1976, Resource partitioning among some eusocial insects: bumblebees, Ecology, 57, 874, 10.2307/1941054

Hodgson, 1986, Commonness and rarity in plants with special reference to the Sheffield flora. Part III: Taxonomic and evolutionary aspects, Biol. Conserv., 36, 275, 10.1016/0006-3207(86)90054-6

Hodgson, 1986, Commonness and rarity in plants with special reference to the Sheffield flora. Part IV: A European context with particular reference to endemism, Biol. Conserv., 36, 297, 10.1016/0006-3207(86)90055-8

Hopper, 1982, Eucalyptus caesia, a rare mallee of granite rocks from south-western Australia, 47

Jain, 1982, Conservation and evolution (book review), Evolution, 36, 420, 10.2307/2408065

Johansen, 1977, Pesticides and pollinators, Annu. Rev. Entomol., 22, 177, 10.1146/annurev.en.22.010177.001141

Karron, J. D. (in press). A comparison of levels of genetic polymorphism and self-compatibility in geographically restricted and widespread plant congeners. Evolutionary Ecology.

Kevan, 1975, Forest application of the insecticide fenitrothion and its effect on wild bee pollinators (Hymenoptera: Apoidea) of lowbush blueberries (Vaccinium spp.) in southern New Brunswick, Canada, Biol. Conserv., 7, 301, 10.1016/0006-3207(75)90045-2

Krombein, 1979, 2

Kruckeberg, 1985, Biological aspects of endemism in higher plants, Annu. Rev. Ecol. Syst., 16, 447, 10.1146/annurev.es.16.110185.002311

Lack, 1982, Competition for pollinators in the ecology of Centaurea scabiosa L. and Centaurea nigra L., II. Observations on nectar production, New Phytol., 91, 309, 10.1111/j.1469-8137.1982.tb03315.x

Lack, 1982, Competition for pollinators in the ecology of Centaurea scabiosa L. and Centaurea nigra L., III. Insect visits and the number of successful pollinations, New Phytol., 91, 321, 10.1111/j.1469-8137.1982.tb03316.x

Levin, 1979, Protein polymorphism in a narrow endemic Oenothera organensis, Evolution, 33, 534, 10.2307/2407778

MacArthur, 1967

Macior, 1974, Pollination ecology of the front range of the Colorado Rocky Mountains, Melanderia, 15, 1

Macior, 1978, The pollination ecology and endemic adaptation of Pedicularis furbishiae S. Wats, Bull. Torrey Bot. Club, 105, 268, 10.2307/2484919

Meagher, 1978, Experimental ecological genetics in Plantago, III. Genetic variation and demography in relation to survival of Plantago cordata, a rare species, Biol. Conserv., 14, 243, 10.1016/0006-3207(78)90043-5

Mehrhoff, 1983, Pollination in the genus Isotria (Orchidaceae), Am. J. Bot., 70, 1444, 10.2307/2443342

Mogford, 1974, Flower colour polymorphism in Cirsium palustre, 2 Pollination, Heredity, 33, 257, 10.1038/hdy.1974.91

Moldenke, 1976, California pollination ecology and vegetation types, Phytologia, 34, 305

Motten, 1981, Pollination effectiveness of specialist and generalist visitors to a North Carolina population of Claytonia virginica, Ecology, 62, 1278, 10.2307/1937292

Motten, 1986, Pollination ecology of the spring wildflower community of a temperate deciduous forest, Ecol. Monogr., 56, 21, 10.2307/2937269

Pielou, 1977

Rabinowitz, 1981, Seven forms of rarity, 205

Rabinowitz, 1984, Competitive abilities of sparse grass species: means of persistence or cause of abundance, Ecology, 65, 1144, 10.2307/1938322

Raven, 1972, A revision of the genus Gaura (Onagraceae), Mem. Torrey Bot. Club, 23, 1

Schonewald-Cox, 1983

Sokal, 1981

Sugden, 1985, Pollinators of Astragalus monoensis Barneby (Fabaceae): New host records; potential impact of grazing, Great Basin Naturalist, 45, 299

Tepedino, 1979, The importance of bees and other insect pollinators in maintaining floral species composition, 3, 139

Thomson, 1985, Matacil insecticide spraying, pollinator mortality, and plant fecundity in New Brunswick forest, Can. J. Bot., 63, 2056, 10.1139/b85-288

US Fish and Wildlife Service, Department of the Interior, 1980, Endangered and threatened wildlife and plants: review of plant taxa for listing as endangered or threatened species, Federal Register, 45

Whittaker, 1975

Wyatt, 1986, Ecology and evolution of self-pollination in Arenaria uniflora (Caryophyllaceae), J. Ecol., 74, 403, 10.2307/2260264