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- W2520220418 abstract "Summary The large-flowered species L. nanus and L. vallicola, and the small-flowered L bicolor of Dunn's classification are fully interfertile. The large-flowered species L. spectabilis and L. affinis are reproductively isolated from the rest of the group, but some sterile hybrids can be obtained between these two species and L. nanus. The smallflowered species L. polycarpus and L. pachylobus are completely reproductively isolated. In the hybridizations attempted, the pollen of one species can not germinate on the stigma of the other species of the group. In the light of the results of the hybridization experiments the two subspecies of L. vallicola were placed in the species L. nanus. The Micranthi group of Lupinus (Leguminosae) in California consists of blueflowered annuals with more or less verticillate racemes. Keels are ciliate on the distal half, in contrast to other blue-flowered verticillate species. The Micranthi group name derives from Lupinus micranthus Dougl., one of the small-flowered species. However, Dunn (1965) has suggested that Lupinus micranthus Dougl. is illegitimate and should be replaced by Lupinus polycarpus Greene. For this reason the authors of this paper propose the name Nanus for the group after the most widespread of the large-flowered species. There are differences of opinion among taxonomists concerning the status of some of the taxa. The most detailed taxonomic treatments were done by C. P. Smith (1922, 1923, 1924) and David Dunn (1955). They differ in their treatments of the large-flowered taxa. Smith places all taxa with flowers 8 to 16 mm long in one species, Lupinus nanus Dougl. because all the large-flowered taxa are morphologically similar, differing only in flower size, wing inflation and, in some cases, leaflet form and pubescence. L. nanus, according to this classification, is divided into: L. nanus sensu stricto, a large-flowered taxon occupying mainly the coastal mountain ranges; var. perlasius, an endemic of serpentine soils in Mariposa County; var. carnosulus, a large-flowered robust taxon of the San Francisco Bay region going north into western Oregon; var. Menkerae, a large-flowered taxon of the dry San Joaquin valley; and two smaller-flowered taxa, var. vallicola, occupying the Sierra Nevada foothills, and var. apricus, occupying the coastal mountain ranges from Monterey .to southwestern Oregon and with a disjunct distribution in the Sierra Nevada. Dunn, however, divides the large-flowered taxa into four species. The varieties perlasius and carnosulus are given species status as L. spectabilis Hoov. and L. affinis G. Agardh., respectively. The varieties vallicola and apricus are placed in one species, L. vallicola Heller, containing var. apricus as a subspecies. Dunn recognizes three subspecies in the rather widespread L. nanus: L. n. ssp Menkerae, the equivalent of var. Menkerae; L. n. ssp latifolius, a large-flowered subspecies from the foggy coastal strip from Santa Barbara County to Mendocino County; and L. n. ssp nanus, a subspecies adapted to the dryer inner slopes of the South Coast ranges." @default.
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- W2520220418 date "2016-01-01" @default.
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- W2520220418 title "GENETICS OF LUPINUS VI. REPRODUCTIVE BARRIERS IN THE" @default.
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