Physaria congesta |
Physaria gordonii |
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Dudley bluffs bladderpod |
Gordon's bladderpod |
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Habit | Perennials; (relatively diminutive, strongly condensed); caudex (buried), simple or branched, (stout, thatched, thickened with persistent leaf bases); densely pubescent, trichomes (appressed, stiff), 4- or 5-rayed, rays fused at center, (mostly bifurcate). | 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 | simple or few from base, decumbent to ascending, (arising laterally from a tight hemispherical tuft of leaves), to 0.15 dm. |
several from base, erect to decumbent or prostrate, (unbranched or branched, sometimes densely leaved), 1–3.5(–4.5) dm. |
Basal leaves | similar to cauline, (erect, surfaces silvery). |
blade obovate to broadly oblong, 1.5–5(–8) cm, margins lyrate-pinnatifid, dentate, or entire. |
Cauline leaves | (ascending, subsessile); blade linear-oblanceolate, (0.6–)0.8–1.3(–1.5) cm, margins entire, (apex acute to narrowly obtuse). |
(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. |
Racemes | strongly congested, (often sessile or nearly so, lateral to leaves). |
dense. |
Flowers | sepals (loosely erect), narrowly oblong, 3–4 mm; petals spatulate, 5–6 mm. |
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). |
Fruiting pedicels | (erect or ascending, straight to slightly curved), 3–6 mm. |
(divaricate-ascending, sigmoid or, sometimes, nearly straight), 5–15(–25) mm. |
Fruits | ovate, compressed (latiseptate) on margins and apically, 4–5 mm; valves pubescent, trichomes densely appressed; ovules 4 per ovary; style 1–1.5 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. |
Seeds | plump. |
flattened. |
2n | = 12, 32. |
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Physaria congesta |
Physaria gordonii |
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Phenology | Flowering Apr–May. | Flowering Feb–Jul. |
Habitat | Barren knolls with pinyon-juniper | Sandy or light soils, rocky plains, caprock ledges, gravelly brushland, sandy desert washes, stream bottoms, pastures, roadsides, abandoned fields |
Elevation | 1800-2100 m (5900-6900 ft) | 150-1700 m (500-5600 ft) |
Distribution |
CO |
AZ; KS; NM; OK; TX; VA; Mexico (Chihuahua, Sonora)
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Discussion | Of conservation concern. Physaria congesta is found on white, decomposed shale of the Thirteenmile Creek Tongue of the Green River Formation. (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.) |
Source | FNA vol. 7, p. 632. | FNA vol. 7, p. 640. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Lesquerella congesta | Vesicaria gordonii, Alyssum gordonii, Lesquerella gordonii, Lesquerella gordonii var. densifolia, P. gordonii subsp. densifolia, P. gordonii var. densifolia |
Name authority | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 322. (2002) | (A. Gray) O’Kane & Al-Shehbaz: Novon 12: 323. (2002) |
Web links |