Physaria calcicola |
Physaria gordonii |
|
---|---|---|
Rocky Mountain bladderpod |
Gordon's bladderpod |
|
Habit | Perennials; (compact); caudex branched; densely (silvery) pubescent, trichomes (sessile or short-stalked), 5–8-rayed, rays distinct, furcate or bifurcate, (umbonate, tuberculate and the center less so). | 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 | several from base, erect or outer ones decumbent, (unbranched, stout, usually sparsely leaved), 1–3 dm. |
several from base, erect to decumbent or prostrate, (unbranched or branched, sometimes densely leaved), 1–3.5(–4.5) dm. |
Basal leaves | blade linear, 2–7(–10) cm, margins entire, repand, or shallowly dentate. |
blade obovate to broadly oblong, 1.5–5(–8) cm, margins lyrate-pinnatifid, dentate, or entire. |
Cauline leaves | (sessile); blade (erect), spatulate to linear, (1–)2–3(–4.5) cm, margins entire, sometimes involute, (apex acute or subacute). |
(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 | dense, (exceeding basal leaves). |
dense. |
Flowers | sepals ovate or oblong, (4.5–)5–6(–7) mm, (lateral pair subsaccate, cucullate, median pair thickened, cucullate apically); petals spatulate, 7–9(–11) mm (widened at base, slightly retuse). |
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 | (spreading, sharply sigmoid), 8–15 mm. |
(divaricate-ascending, sigmoid or, sometimes, nearly straight), 5–15(–25) mm. |
Fruits | (sessile or substipitate), ovate to oblong, not compressed at distal margins or apex, 5–9 mm; valves sparsely pubescent, trichomes appressed; ovules 4–8 per ovary; style 3–5 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 | flattened. |
flattened. |
2n | = 16, ca. 20. |
= 12, 32. |
Physaria calcicola |
Physaria gordonii |
|
Phenology | Flowering May–Jun. | Flowering Feb–Jul. |
Habitat | Shale bluffs, limestone hillsides, gypseous knolls and ravines, calcareous substrates, grasslands and pinyon-juniper communities | Sandy or light soils, rocky plains, caprock ledges, gravelly brushland, sandy desert washes, stream bottoms, pastures, roadsides, abandoned fields |
Elevation | 1400-2100 m (4600-6900 ft) | 150-1700 m (500-5600 ft) |
Distribution |
CO; NM
|
AZ; KS; NM; OK; TX; VA; Mexico (Chihuahua, Sonora)
|
Discussion | Of conservation concern. (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. 629. | FNA vol. 7, p. 640. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Lesquerella calcicola | 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) |
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