Physaria oregona |
Physaria pruinosa |
|
---|---|---|
Oregon twin-pod |
frosty bladderpod, Pagosa bladderpod |
|
Habit | Perennials; caudex simple, (cespitose); (silvery) pubescent throughout, trichomes (stalked), few-rayed, rays furcate or imperfectly so, (tuberculate throughout). | Perennials; caudex simple or branched, (covered with persistent leaf bases); densely pubescent, trichomes (sessile or subsessile), 4–7-rayed, rays furcate or bifurcate, (tuberculate throughout). |
Stems | several from base, erect or somewhat decumbent, (unbranched), 1–3.5 dm. |
simple or several from base, decumbent or erect, (unbranched), to 2 dm. |
Basal leaves | (petiole slender, usually incised or with broad teeth along petiole); blade obovate, 4–6 cm, margins entire. |
(petiole sharply differentiated from blade, slender); blade suborbicular or obovate to rhombic, 4–8 cm, (base abruptly narrowed to petiole), margins entire, sinuate, or shallowly dentate, (abaxial surface densely pubescent, adaxial lightly pubescent). |
Cauline leaves | blade oblanceolate or broader, 1.5–2.5 cm, margins entire or sparsely dentate, (apex acute). |
(proximal petiolate, distal sessile); blade obovate to rhombic, 0.8–2.3 cm, margins entire or shallowly toothed. |
Racemes | somewhat loose, (5–15 cm). |
dense, (somewhat elongated in fruit). |
Flowers | sepals oblong, 5–7 mm; petals (lemon yellow), spatulate, 9–12 mm. |
sepals elliptic or oblong, ca. 6 mm, (lateral pair not saccate or subsaccate, cucullate, median pair thickened apically, cucullate); petals spatulate, ca. 9 mm, (claw expanded at base). |
Fruiting pedicels | (spreading or ascending, curved, fruits not pendent), 10–20 mm. |
(horizontal to ascending, sigmoid or slightly curved), 8–11 mm, (stout). |
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. |
(sessile or substipitate, often becoming copper-red in age), subglobose or ellipsoid, inflated, 6–9 mm, (firm, glossy); valves (not retaining seeds after dehiscence), glabrous throughout; replum as wide as or wider than fruit; ovules 4–8(–12) per ovary; style 3.5–7 mm. |
Seeds | flattened. |
somewhat flattened. |
2n | = 8. |
|
Physaria oregona |
Physaria pruinosa |
|
Phenology | Flowering Apr–Jun. | Flowering May–Jun(-Aug). |
Habitat | Gravelly banks, stream shores, rocky slopes, dry hillsides, serpentine soils | Mancos slate or shale, meadows, gentle slopes, edges of ponderosa pine stands |
Elevation | 900-1900 m (3000-6200 ft) | 2100-2600 m (6900-8500 ft) |
Distribution |
ID; OR; WA
|
CO; NM |
Discussion | Of conservation concern. The one New Mexico population is near the border with Colorado, in Rio Arriba County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 7, p. 655. | FNA vol. 7, p. 658. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Coulterina oregona, Lesquerella oregona | Lesquerella pruinosa |
Name authority | S. Watson: Proc. Amer. Acad. Arts 17: 363. (1882) | (Greene) O’Kane & Al-Shehbaz: Novon 12: 327. (2002) |
Web links |