Physaria ovalifolia |
Physaria gordonii |
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roundleaf bladderpod |
Gordon's bladderpod |
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Habit | Perennials; caudex simple or branched, (thickened by persistent leaf bases); densely pubescent (foliage usually scabrous), trichomes (sessile or short-stalked), several-rayed, rays furcate near base, (usually strongly umbonate, roughly tuberculate, less so over umbo). | 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). | ||||
Stems | few to several from base, erect or outer decumbent, 0.5–2.5 dm. |
several from base, erect to decumbent or prostrate, (unbranched or branched, sometimes densely leaved), 1–3.5(–4.5) dm. |
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Basal leaves | blade suborbicular to elliptic or ovate or deltate, 0.5–2(–6.5) cm, margins entire or shallowly dentate. |
blade obovate to broadly oblong, 1.5–5(–8) cm, margins lyrate-pinnatifid, dentate, or entire. |
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Cauline leaves | (proximal shortly petiolate, distal usually sessile); blade narrowly elliptic or obovate, (0.5–)1–2.5(–4) cm, margins entire. |
(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. |
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Racemes | compact, (± subumbellate to densely corymbiform, elongated or not). |
dense. |
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Flowers | sepals ± elliptic, 4.5–7(–8.5) mm, (median pair thickened apically); petals (sometimes white), suborbicular to obovate or obdeltate, 6.5–15 mm, (base narrowing to broad claw, apex sometimes emarginated). |
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). |
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Fruiting pedicels | (usually spreading at right angles, sometimes nearly erect, ± straight), 5–15(–20) mm, (stout). |
(divaricate-ascending, sigmoid or, sometimes, nearly straight), 5–15(–25) mm. |
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Fruits | (sessile or shortly stipitate, less than 1 mm), subglobose to broadly ellipsoid, inflated or slightly compressed (terete or subterete), (4–)5–8(–9) mm; valves (not retaining seeds after dehiscence), glabrous; replum as wide as or wider than fruit; ovules 8–16 per ovary; style 4–8(–9) mm. |
(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. |
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Seeds | flattened. |
flattened. |
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2n | = 12, 32. |
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Physaria ovalifolia |
Physaria gordonii |
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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 |
CO; KS; NE; NM; OK; TX
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AZ; KS; NM; OK; TX; VA; Mexico (Chihuahua, Sonora)
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 7, p. 655. | FNA vol. 7, p. 640. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Lesquerella ovalifolia, Lesquerella engelmannii subsp. ovalifolia | Vesicaria gordonii, Alyssum gordonii, Lesquerella gordonii, Lesquerella gordonii var. densifolia, P. gordonii subsp. densifolia, P. gordonii var. densifolia | ||||
Name authority | (Rydberg) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | (A. Gray) O’Kane & Al-Shehbaz: Novon 12: 323. (2002) | ||||
Web links |