Aphragmus |
Brassicaceae tribe Aphragmeae |
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aphragmus |
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Habit | Plants not scapose; (sometimes rhizomatous, caudex thick, covered with persistent petiolar remains); glabrous or pubescent, trichomes simple or forked, (less than 0.1 mm). | Perennials [annuals]; eglandular. |
Stems | erect or ascending, branched basally. |
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Leaves | basal and cauline; petiolate or sessile; basal rosulate, petiolate, blade margins entire; cauline petiolate or sessile, blade margins entire. |
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Cauline leaves | petiolate or sessile; blade base not auriculate, (cuneate or attenuate), margins entire. |
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Trichomes | simple or forked, (minute). |
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Racemes | (few- to several-flowered), bracteate throughout or basally. |
bracteate, sometimes elongated in fruit. |
Flowers | sepals (sometimes persistent), oblong; petals broadly obovate or spatulate, claw subequaling sepal, (apex rounded [obtuse]); stamens slightly tetradynamous; filaments dilated or not basally; anthers obtuse; nectar glands confluent, subtending bases of stamens. |
actinomorphic; sepals erect or ascending, lateral pair seldom saccate basally; petals white or lavender [pink, blue, or purple], claw present [absent], distinct; filaments unappendaged, not winged; pollen 3-colpate. |
Fruiting pedicels | [erect] ascending, divaricate, sometimes recurved, slender. |
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Fruits | silicles or siliques, sessile or subsessile, oblong, elliptic, or lanceolate [ovate, linear]; valves each with obscure or distinct midvein, (smooth), glabrous; replum flattened basally; septum absent [complete and membranous]; style obsolete or distinct (to 2 mm); stigma capitate. |
silicles or siliques, dehiscent, unsegmented, latiseptate [terete]; ovules 6–8[–32] per ovary; style obsolete or distinct; stigma entire. |
Seeds | plump, not winged, oblong or ovoid (on filiform funicles often longer than seeds); seed coat (minutely reticulate), not mucilaginous when wetted; cotyledons incumbent. |
biseriate [uniseriate]; cotyledons incumbent. |
x | = 7. |
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Aphragmus |
Brassicaceae tribe Aphragmeae |
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Distribution |
nw North America; Asia (Himalaya, Russian Far East) |
nw North America; Asia (Himalaya, Russian Far East) |
Discussion | Species 11 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Genus 1, species 11 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 256. | FNA vol. 7, p. 255. |
Parent taxa | ||
Subordinate taxa | ||
Synonyms | Oreas, Orobium, Staintoniella | |
Name authority | Andrzejowski ex de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 1: 209. (1824) | D. A. German & Al-Shehbaz: Harvard Pap. Bot. 13: 168. (2008) |
Web links |