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aphragmus

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.

Leaves

basal and cauline;

petiolate or sessile;

basal rosulate, petiolate, blade margins entire;

cauline petiolate or sessile, blade margins entire.

Cauline leaves

petiolate or sessile;

blade base not auriculate, (cuneate or attenuate), margins entire.

Trichomes

simple or forked, (minute).

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.

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.

Aphragmus

Brassicaceae tribe Aphragmeae

Distribution
from USDA
nw North America; Asia (Himalaya, Russian Far East)
[BONAP county map]
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. Author: Ihsan A. Al-Shehbaz. FNA vol. 7, p. 255.
Parent taxa Brassicaceae > tribe Aphragmeae Brassicaceae
Subordinate taxa
A. eschscholtzianus
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)
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