Results 131 to 140 of about 1,714 (156)

Rare Plant Demography: Lessons from the Mariposa Lilies (Calochortus: Liliaceae)

1998
Rare plants have been intensively studied and described in the past two decades (e.g., Falk and Holsinger 1991; Given 1994; Frankel, Brown, and Burdon 1995; Falk, Millar, and Olwell 1996), in part due to the recovery mandates under the U.S. Endangered Species Act of 1973.
Peggy L. Fiedler, B. E. Knapp, Nancy Fredricks   +2 more
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The radiation of Calochortus : generalist flowers moving through a mosaic of potential pollinators

Oikos, 2000
Few studies have surveyed the insects visiting flowers at many sites and for many related species. Calochortus , a genus of about 60 species with its center of diversity in California, has flowers with a wide range of appearances. Insects visiting Calochortus
James D. Dilley, Paul Wilson, Michael R. Mesler   +2 more
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Dormancy and flowering in two mariposa lilies (Calochortus) with contrasting distribution patterns

Canadian Journal of Botany, 2004
We investigated patterns of dormancy and reproduction over time in two long-lived grassland perennial species, Calochortus lyallii Baker and Calochortus macrocarpus Dougl. Three populations of each species were monitored over 5 years near Osoyoos, British Columbia, at the northern range limit for C.
Michael T Miller, Geraldine A Allen, Joseph A Antos   +2 more
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Cytological Studies in Relation to the Classification of the Genus Calochortus

Botanical Gazette, 1939
1. Chromosome counts for the following species and varieties of Calochortus are reported: C. elegans var. nanus.-Diploid, 20 chromosomes; 10 bivalents at metaphase I of meiosis. C. longebarbatus.-Diploid, 20 chromosomes; 10 bivalents at metaphase I of meiosis. C. longebarbatus var.
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DISENTANGLING PHENOTYPIC PATTERNS FROM EVOLUTIONARY PROCESSES IN HIGHLY DIVERSE CALIFORNIA WILDFLOWERS, THE GENUS CALOCHORTUS

2022
168 pages ; A key goal of evolutionary biology is to understand the processes that drive and maintain biodiversity across heterogeneous landscapes. My dissertation leverages a highly polymorphic system in Calochortus, C. venustus, to identify and to interpret the evolutionary significance of geographical patterns of floral trait variation, genetic ...
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NEW SPECIES OF CALOCHORTUS (LILIACEAE) AND LINUM (LINACEAE) FROM NORTHERN MEXICO

1983
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Demographic differences between two sympatric lilies (Calochortus) with contrasting distributions, as revealed by matrix analysis

Plant Ecology, 2007
Related species of similar morphology can differ greatly in distribution and abundance. Elucidating reasons for such differences can contribute to an understanding of intrinsic limiting factors and the causes of rarity. We studied sympatric populations of two terrestrial lilies with contrasting distributions: Calochortus lyallii, which is ...
Michael T. Miller, Joseph A. Antos, Geraldine A. Allen   +2 more
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Morphological Comparison of Calochortus howellii and a New Species from Southwestern Oregon, C. umpquaensis (Liliaceae)

Systematic Botany, 1989
Calochortus umpquaensis (Liliaceae), a new species from Oregon, is from a very limited area in Douglas County. Morphological comparisons are made between it and the closely related C. howellii, which is endemic to the Illinois River drainage of Josephine County, Oregon.
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UNA NUEVA ESPECIE DE CALOCHORTUS (LILIACEAE-TULIPEAE) DEL SUR DE MEXICO

1991
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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HEAVY METAL ACCUMULATION AND THE NATURE OF EDAPHIC ENDEMISM IN THE GENUS CALOCHORTUS (LILIACEAE)

American Journal of Botany, 1985
Bulb and leaf tissues from five species in the genus Calochortus and the soils from collection sites were analyzed for cation and trace element concentrations. All five species, only three of which are considered ultramafic endemics, possessed high concentrations of nickel and copper in both the bulbs and leaves, but not at levels high enough (> 1 ...
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