Physaria gordonii |
Physaria occidentalis |
|||||
---|---|---|---|---|---|---|
Gordon's bladderpod |
western bladder-pod |
|||||
Habit | Annuals, biennials, or perennials; (short-lived); with a fine taproot; usually densely pubescent, trichomes (sessile or short-stalked), 4–7-rayed, rays distinct and furcate or bifurcate, (nearly smooth to finely tuberculate). | Perennials; caudex simple or branched, (thickened, sometimes subterranean); densely pubescent, trichomes (sessile or short-stalked), 5–7-rayed, raysdistinct, bifurcate, (moderately to prominently tuberculate). | ||||
Stems | several from base, erect to decumbent or prostrate, (unbranched or branched, sometimes densely leaved), 1–3.5(–4.5) dm. |
few to several from base, prostrate to decumbent or erect, (usually unbranched), 0.3–1.5(–3) dm. |
||||
Basal leaves | blade obovate to broadly oblong, 1.5–5(–8) cm, margins lyrate-pinnatifid, dentate, or entire. |
(petiole slender); blade suborbicular to obovate or elliptic, 1–8 cm, (base narrowing gradually or abruptly to petiole), margins sinuate-dentate or entire. |
||||
Cauline leaves | (proximal sometimes petiolate, distal sessile); blade linear to oblanceolate, often falcate, 1–4(–7) cm, (proximal with base sometimes cuneate), margins entire, repand, or shallowly dentate. |
(proximal shortly petiolate, distal sessile); blade oblanceolate, 0.5–1.5(–2.5) cm, margins entire or remotely dentate. |
||||
Racemes | dense. |
dense or loose. |
||||
Flowers | sepals elliptic or oblong, 3–6.5 mm, (lateral pair subsaccate, median pair thickened apically, cucullate); petals (widely spreading at anthesis, yellow to orange, claw sometimes whitish), cuneate, obdeltate, or obovate, (tapering to claw), 5–8(–10) mm, (claw often widened at base). |
sepals elliptic or oblong-elliptic, 4.5–7 mm, (median pair cucullate); petals spatulate, 7–9(–14) mm, (claw undifferentiated from blade). |
||||
Fruiting pedicels | (divaricate-ascending, sigmoid or, sometimes, nearly straight), 5–15(–25) mm. |
(sigmoid or curved), 5–10(–15) mm. |
||||
Fruits | (shortly stipitate), subglobose, not or slightly compressed, (3–)4–8 mm; valves (not retaining seeds after dehiscence), glabrous throughout; replum as wide as or wider than fruit; ovules (8–)12–20(–26) per ovary; style (1.5–)2–4(–5) mm. |
(erect), ellipsoid to obovoid, compressed at apex and sometimes margins (strongly latiseptate), (5–)6–9 mm, (apex acute, often beaked); valves densely pubescent, trichomes appressed or spreading, sometimes sparsely pubescent inside, trichomes 4- or 5-rayed; ovules 4–12 per ovary; style (2–)3–6.5 mm, (often sparsely pubescent). |
||||
Seeds | flattened. |
inner surface flattened, outer convex. |
||||
2n | = 12, 32. |
|||||
Physaria gordonii |
Physaria occidentalis |
|||||
Phenology | Flowering Feb–Jul. | |||||
Habitat | Sandy or light soils, rocky plains, caprock ledges, gravelly brushland, sandy desert washes, stream bottoms, pastures, roadsides, abandoned fields | |||||
Elevation | 150-1700 m (500-5600 ft) | |||||
Distribution |
AZ; KS; NM; OK; TX; VA; Mexico (Chihuahua, Sonora)
|
CA; ID; NV; OR; UT; WA
|
||||
Discussion | Physaria gordonii was reported from Virginia in 1987 by Robert Wright from a Hampton Shale roadcut along the Blue Ridge Parkway, where it was probably a short-lived waif. Subspecies densifolia, of Lincoln County, New Mexico, of which there is now more material than Rollins had available in 1993, appears to represent a suite of environmentally determined, variable, and intergrading characteristics that does not merit taxonomic recognition. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 7, p. 640. | FNA vol. 7, p. 654. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Vesicaria gordonii, Alyssum gordonii, Lesquerella gordonii, Lesquerella gordonii var. densifolia, P. gordonii subsp. densifolia, P. gordonii var. densifolia | Vesicaria occidentalis, Lesquerella occidentalis | ||||
Name authority | (A. Gray) O’Kane & Al-Shehbaz: Novon 12: 323. (2002) | (S. Watson) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | ||||
Web links |