Physaria gordonii |
Physaria calderi |
|
---|---|---|
Gordon's bladderpod |
Calder's bladderpod |
|
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; densely pubescent throughout, trichomes (sessile or subsessile), rays distinct or slightly fused at base, furcate or bifurcate, (strongly umbonate, tuberculate, tubercles often relatively larger, fewer over center). |
Stems | several from base, erect to decumbent or prostrate, (unbranched or branched, sometimes densely leaved), 1–3.5(–4.5) dm. |
simple or few to several from base, usually erect to spreading, sometimes prostrate, 0.5–2 dm. |
Basal leaves | blade obovate to broadly oblong, 1.5–5(–8) cm, margins lyrate-pinnatifid, dentate, or entire. |
blade oblanceolate, 2–3 cm, margins 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. |
(sessile or proximal shortly petiolate); blade narrowly oblanceolate, 0.5–1.5 cm, margins entire. |
Racemes | dense. |
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 ovate to elliptic, (3–)4–5(–6) mm, (median pair often thickened apically, cucullate); petals obovate, (6–)7–10 mm (nearly as wide, abruptly narrowed to claw, ca. 1 mm wide). |
Fruiting pedicels | (divaricate-ascending, sigmoid or, sometimes, nearly straight), 5–15(–25) mm. |
(erect to divaricate or ascending, sometimes curved), (5–)10–20(–40) mm, (stout). |
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. |
subglobose to ellipsoid, compressed (usually angustiseptate), to 8 mm; (valves not retaining seeds after dehiscence); replum as wide as or wider than fruit; ovules 10–14 per ovary; style 1–2 mm. |
Seeds | flattened. |
plump. |
2n | = 12, 32. |
= 20. |
Physaria gordonii |
Physaria calderi |
|
Phenology | Flowering Feb–Jul. | Flowering Jun–Aug. |
Habitat | Sandy or light soils, rocky plains, caprock ledges, gravelly brushland, sandy desert washes, stream bottoms, pastures, roadsides, abandoned fields | Dry rocky summits, limestone flats and slopes, alpine knolls |
Elevation | 150-1700 m (500-5600 ft) | 600-1500 m (2000-4900 ft) |
Distribution |
AZ; KS; NM; OK; TX; VA; Mexico (Chihuahua, Sonora)
|
AK; NT; YT |
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.) |
Physaria calderi is known from the Ogilvie and Richardson mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 640. | FNA vol. 7, p. 629. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Vesicaria gordonii, Alyssum gordonii, Lesquerella gordonii, Lesquerella gordonii var. densifolia, P. gordonii subsp. densifolia, P. gordonii var. densifolia | Lesquerella calderi, Lesquerella arctica subsp. calderi |
Name authority | (A. Gray) O’Kane & Al-Shehbaz: Novon 12: 323. (2002) | (G. A. Mulligan & A. E. Porsild) O’Kane & Al-Shehbaz: Novon 12: 322. (2002) |
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