Physaria alpina |
Physaria bellii |
|
---|---|---|
Avery Peak or alpine twinpod, Avery Peak twinpod |
Bell's or Front Range twinpod, Bell's twinpod, Front Range twinpod |
|
Habit | Perennials; (with a long taproot), caudex usually buried, simple, (enlarged, covered with marcescent leaf bases, crown rosulate and horizontal to somewhat ascending, forming a dense crown at apex of caudex); (silvery) pubescent throughout, trichomes (sessile or stipitate), 5–8-rayed, rays furcate or bifurcate, (rounded to umbonate, strongly tuberculate, less so or smooth over center). | Perennials; caudex simple, (relatively large); densely (silvery) pubescent, trichomes (sessile, appressed), rays furcate, fused at base. |
Stems | few from base, decumbent, (arising laterally proximal to current season’s leaves), 0.3–0.8 dm. |
simple from base, decumbent to nearly prostrate, 0.5–1.3 dm. |
Basal leaves | (petiole slender); blade broadly obovate, or deltate to ovate or narrower, 1.5–3.5 cm, (base abruptly to gradually narrowed to petiole), margins entire or obscurely few-toothed, (apex usually obtuse, nearly acute in narrower leaves). |
(strongly rosulate; shortly petiolate); blade broadly obovate, 1.5–7.5 (width 7.5–26 mm, base gradually tapering to petiole), margins shallowly dentate, (apex obtuse). |
Cauline leaves | (2–5 per stem); blade oblanceolate to spatulate, similar to basal, margins entire, (apex acute). |
blade oblanceolate to broadly obovate, 1–2.5 cm, margins entire. |
Racemes | loose, (3–6-flowered). |
dense. |
Flowers | sepals narrowly oblong to linear, 7–9 mm; petals (erect), spatulate, 10–12(–15) mm. |
sepals (pale yellow or yellow-green), narrowly lanceolate to narrowly deltate, 4–8 mm; petals yellow, broadly spatulate to obovate, 9–13 mm, (not clawed). |
Fruiting pedicels | (widely spreading to ascending, slightly curved or straight), 7–11 mm. |
(divaricate-ascending to widely spreading, slightly sigmoid to curved), 7–12 mm. |
Fruits | (usually purplish in age), didymous, irregular and somewhat angular, not highly inflated, 4–11 × 10–13 mm, (coriaceous, papery, shallowly grooved distally and on sides, tapered and narrowed toward replum, base obtuse to truncate, apex with broad sinus to nearly truncate); valves (retaining seeds after dehiscence), densely pubescent, not silvery; replum elliptic to obovate, as wide as or wider than fruit, base rounded, margins sparsely pubescent or glabrous, apex rounded (with funicles); ovules 4 per ovary; style 5–7 mm, (glabrous). |
didymous, slightly flattened (contrary to replum) to uncompressed, 4–9 × 2–8 mm, (strongly coriaceous, apical and basal sinuses narrow, deep); valves (retaining seeds after dehiscence), pubescent, trichomes appressed; replum narrowly oblanceolate to narrowly linear-oblong, as wide as or wider than fruit, apex obtuse; ovules 4 per ovary; style more than 3 mm. |
Seeds | flattened. |
compressed. |
2n | = 8. |
|
Physaria alpina |
Physaria bellii |
|
Phenology | Flowering Jun–Jul. | Flowering Mar–Jun(-Jul). |
Habitat | Whitish or red substrates from limestone or dolomite, ridge crests, rocky alpine tundra and open areas | Dark shale, road cuts, ridge crests, washes |
Elevation | 3500-4000 m (11500-13100 ft) | 1500-1800 m (4900-5900 ft) |
Distribution |
CO
|
CO
|
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Physaria bellii is often found in shale and limestone soils of the Fountain/Ingleside, Lykins, Niobrara, and Pierre formations. It is in the Center for Plant Conservation’s National Collection of Endangered Plants. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 624. | FNA vol. 7, p. 628. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Rollins: Brittonia 33: 339. (1981) | G. A. Mulligan: Canad. J. Bot. 44: 1662, fig. 1, plate 1, fig. 3. (1966) |
Web links |