Aphragmus |
Aphragmus eschscholtzianus |
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aphragmus |
Aleutian cress, Eschscholtz's aphragmus, Eschscholtz's little nightmare |
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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). | |
Stems | erect or ascending, branched basally. |
2–6 cm; glabrous or sparsely puberulent, trichomes simple. |
Leaves | basal and cauline; petiolate or sessile; basal rosulate, petiolate, blade margins entire; cauline petiolate or sessile, blade margins entire. |
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Basal leaves | petiole 0.5–3 cm (base persistent, papery, broadly expanded, narrowly triangular, 0.2–0.4 cm wide); blade (subfleshy), spatulate, oblanceolate, or ovate, 0.5–1.2 cm × 2–4 mm, base cuneate to attenuate, apex obtuse, surfaces glabrous or puberulent. |
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Cauline leaves | (bracts), sessile; blade similar to basal, narrower, smaller distally. |
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Racemes | (few- to several-flowered), bracteate throughout or basally. |
subumbellate. |
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. |
sepals often purplish, 1.5–2 × 0.7–1 mm, glabrous; petals purple with darker veins, 2–3 × 1–2 mm; filaments 1.5–2 mm; anthers 0.2–0.4 mm; gynophore 0–0.7 mm. |
Fruiting pedicels | [erect] ascending, divaricate, sometimes recurved, slender. |
1.5–5 mm, glabrous or sparsely puberulent adaxially. |
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. |
compressed, 5–15 × 2–3 mm; style 0.2–1 mm. |
Seeds | plump, not winged, oblong or ovoid (on filiform funicles often longer than seeds); seed coat (minutely reticulate), not mucilaginous when wetted; cotyledons incumbent. |
light brown, 1.2–1.7 × 0.8–1 mm; funicles 2–3 mm. |
x | = 7. |
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2n | = 14. |
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Aphragmus |
Aphragmus eschscholtzianus |
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Phenology | Flowering Jun–Jul. | |
Habitat | Limestone slopes, subalpine valleys, wet cliffs, ridges, fine gravel saturated by snowmelt | |
Elevation | 0-2100 m (0-6900 ft) | |
Distribution |
nw North America; Asia (Himalaya, Russian Far East) |
AK; YT; Asia (Russian Far East [Chukchi Peninsula]) |
Discussion | Species 11 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 7, p. 256. | FNA vol. 7, p. 256. |
Parent taxa | ||
Subordinate taxa | ||
Synonyms | Oreas, Orobium, Staintoniella | Eutrema eschscholtzianum |
Name authority | Andrzejowski ex de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 1: 209. (1824) | Andrzejowski ex de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 1: 210. (1824) |
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