Physaria oregona |
Physaria pendula |
|
---|---|---|
Oregon twin-pod |
Snake Range bladderpod |
|
Habit | Perennials; caudex simple, (cespitose); (silvery) pubescent throughout, trichomes (stalked), few-rayed, rays furcate or imperfectly so, (tuberculate throughout). | Perennials; caudex simple; densely pubescent, trichomes 5–7-rayed, rays bifurcate or trifurcate. |
Stems | several from base, erect or somewhat decumbent, (unbranched), 1–3.5 dm. |
several from base, erect or outer usually decumbent toward base, (from below a terminal tuft of mostly erect leaves, unbranched), 1–2 dm. |
Basal leaves | (petiole slender, usually incised or with broad teeth along petiole); blade obovate, 4–6 cm, margins entire. |
blade ovate to elliptic, 2–4 cm, (base gradually narrowed to petiole), margins entire, (surfaces densely pubescent with trichome layers). |
Cauline leaves | blade oblanceolate or broader, 1.5–2.5 cm, margins entire or sparsely dentate, (apex acute). |
(remote, proximal shortly petiolate); blade spatulate to oblanceolate, similar to basal, (base often cuneate), margins entire. |
Racemes | somewhat loose, (5–15 cm). |
elongated. |
Flowers | sepals oblong, 5–7 mm; petals (lemon yellow), spatulate, 9–12 mm. |
sepals linear-oblong, 5–7 mm, (lateral pair subsaccate); petals (erect), lingulate, 8–10 mm, (claw barely differentiated from blade). |
Fruiting pedicels | (spreading or ascending, curved, fruits not pendent), 10–20 mm. |
(recurved), 7–10 mm. |
Fruits | didymous, obreniform, moderately inflated, angustispetate, (8–)10–12(–15) × 10–14(–16) mm, (papery, not keeled, basal sinus absent, apical sinus broad and open); valves (retaining seeds after dehiscence, rounded or irregular), loosely pubescent, trichomes spreading; replum broadly lanceolate, as wide as or wider than fruit, apex acute; ovules 8 per ovary; style 1–2 mm. |
(usually pendent, sessile), subglobose, slightly flattened (angustiseptate), 4–5 mm; valves densely pubescent, trichomes somewhat spreading; ovules 8–12 per ovary; style 4–5 mm. |
Seeds | flattened. |
plump, (mucilaginous when wetted). |
2n | = 8. |
|
Physaria oregona |
Physaria pendula |
|
Phenology | Flowering Apr–Jun. | Flowering May–Jun. |
Habitat | Gravelly banks, stream shores, rocky slopes, dry hillsides, serpentine soils | Limestone gravel and cobbles, typically with junipers |
Elevation | 900-1900 m (3000-6200 ft) | 1700-2100 m (5600-6900 ft) |
Distribution |
ID; OR; WA
|
NV |
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 7, p. 655. | FNA vol. 7, p. 657. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Coulterina oregona, Lesquerella oregona | Lesquerella pendula |
Name authority | S. Watson: Proc. Amer. Acad. Arts 17: 363. (1882) | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) |
Web links |