Stanleya |
Brassicaceae tribe Thelypodieae |
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Prince's plume, stanleya |
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Habit | Annuals, perennials, shrubs, or subshrubs; (base usually woody); not scapose; glabrous or pubescent. | Annuals, biennials, perennials, shrubs, or subshrubs; eglandular. | ||||||||||||||||||||||||||||
Stems | usually erect, rarely ascending, unbranched or branched. |
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Leaves | cauline and, sometimes, basal; petiolate or sessile; basal rosulate, petiolate, blade margins entire, lyrately lobed or 1- or 2-pinnatifid; cauline blade (base sometimes auriculate or amplexicaul), margins entire or dentate to pinnatifid. |
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Cauline leaves | petiolate or sessile; blade base auriculate or not, margins entire, dentate, or pinnately lobed. |
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Trichomes | usually simple, rarely forked or dendritic [subdendritic], sometimes absent. |
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Racemes | considerably elongated in fruit. |
usually ebracteate, often elongated in fruit. |
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Flowers | sepals spreading to reflexed, oblong-linear or linear, lateral pair not saccate basally; petals usually yellow or whitish, rarely white or yellow-orange, obovate, orbicular, oblong, linear, filiform, or oblanceolate, claw distinctly differentiated from blade (claw glabrous or papillose); stamens (exserted), equal; filaments not dilated basally, (often papillose basally); anthers linear, (strongly spirally coiled after dehiscence); lateral nectar glands annular, median present or absent, confluent with lateral ones. |
usually actinomorphic, rarely zygomorphic; sepals erect, ascending, spreading, or reflexed, lateral pair saccate or not basally; petals white, yellow, orange, pink, lilac, lavender, purple, green, brown, or nearly black, claw present, often distinct; filaments unappendaged, not winged; pollen 3-colpate. |
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Fruiting pedicels | horizontal, divaricate, or divaricate-ascending, slender. |
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Fruits | long-stipitate, linear, often torulose, terete or latiseptate; valves each with prominent midvein, glabrous; replum rounded; septum complete; ovules 22–70 per ovary; style obsolete or distinct (to 1.7 mm); stigma capitate, entire. |
usually siliques, rarely silicles, usually dehiscent, unsegmented, usually terete, 4-angled, or latiseptate; ovules 1–210[–numerous] per ovary; style obsolete, distinct, or absent; stigma usually entire or 2-lobed (subentire in Sibaropsis, Streptanthella). |
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Seeds | uniseriate, plump, not winged, usually oblong, rarely ovoid; seed coat (obscurely reticulate), slightly mucilaginous when wetted; cotyledons accumbent to incumbent. |
usually biseriate or uniseriate, rarely aseriate; cotyledons accumbent or incumbent. |
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x | = 14. |
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Stanleya |
Brassicaceae tribe Thelypodieae |
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Distribution |
w United States; c United States |
North America; Mexico; Central America; South America |
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Discussion | Species 7 (7 in the flora). Both R. C. Rollins (1993) and N. H. Holmgren (2005b) reported n = 12 and 2n = 24 for various species of Stanleya. However, those counts, all reported previously by Rollins (1939c), are erroneous; no species of the genus has numbers deviating from n = 14 or 28. All species of Stanleya are well-defined, and interspecific hybridization has not yet been reported. One species, S. pinnata, is a hyperaccumulator of selenium and is a good indicator for the presence of this element in soils. Poisoning of livestock results from their feeding on large quantities of plants of this species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Genera 27, species ca. 215 (14 genera, 105 species in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 695. | FNA vol. 7, p. 676. | ||||||||||||||||||||||||||||
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Name authority | Nuttall: Gen. N. Amer. Pl. 2: 71. (1818) | Prantl: in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam. 55[III,2]: 155. (1891) | ||||||||||||||||||||||||||||
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