Physaria gordonii |
Physaria ludoviciana |
|
---|---|---|
Gordon's bladderpod |
foothill bladderpod, silver 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, trichomes (sessile or short-stalked), 4–7-rayed, rays usually furcate, sometimes bifurcate, (rough-tuberculate throughout). |
Stems | several from base, erect to decumbent or prostrate, (unbranched or branched, sometimes densely leaved), 1–3.5(–4.5) dm. |
few from base, erect with outer usually decumbent, 1–3.5(–5) dm. |
Basal leaves | blade obovate to broadly oblong, 1.5–5(–8) cm, margins lyrate-pinnatifid, dentate, or entire. |
(erect); blade narrowly lanceolate to linear or (outer) oblanceolate, (1–)2–6(–9) cm, margins usually entire, rarely shallowly dentate, (inner involute, outer usually flat, base usually with some simple trichomes). |
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. |
blade narrowly oblanceolate to linear, (1–)2–4(–8) cm, margins flat or involute. |
Racemes | dense. |
compact, (elongated and loose in fruit, densely-flowered). |
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 oblong to broadly elliptic, 4–7(–8) mm, (lateral pair subsaccate, median pair cucullate); petals oblanceolate or obovate, (5–)6.5–9.5(–11) mm, (claw undifferentiated from blade, or blade gradually narrowed to claw). |
Fruiting pedicels | (divaricate-ascending, sigmoid or, sometimes, nearly straight), 5–15(–25) mm. |
(usually recurved), (5–)10–20(–25) 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. |
subglobose or obovoid, usually inflated, sometimes slightly compressed, (3–)4–6 mm; valves densely pubescent, trichomes spreading, usually pubescent inside, trichomes appressed, sessile; ovules (4–)8–12(–16) per ovary; style 3–4.5(–6.5) mm. |
Seeds | flattened. |
slightly flattened. |
2n | = 12, 32. |
= 10, 20, 30. |
Physaria gordonii |
Physaria ludoviciana |
|
Phenology | Flowering Feb–Jul. | Flowering Apr–Jul(-Aug). |
Habitat | Sandy or light soils, rocky plains, caprock ledges, gravelly brushland, sandy desert washes, stream bottoms, pastures, roadsides, abandoned fields | Sandy or gravelly soils, steep hillsides, prairie pastures, clay slopes, limestone outcrops, sand dunes, open plains, sandy bluffs, rocky flats, white tuff sands |
Elevation | 150-1700 m (500-5600 ft) | 0-1900 m (0-6200 ft) |
Distribution |
AZ; KS; NM; OK; TX; VA; Mexico (Chihuahua, Sonora)
|
AZ; CA; CO; IA; IL; KS; MN; MT; ND; NE; NM; NV; OK; SD; UT; WI; WY
|
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.) |
Material previously reported as Physaria ludoviciana from Canada (Alberta, Manitoba, Saskatchewan) is here included in 6a. P. arenosa subsp. arenosa. Lesquerella argentea (Pursh) MacMillan is a later homonym that has been used for P. ludoviciana. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 640. | FNA vol. 7, p. 649. |
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 | Alyssum ludovicianum, Lesquerella ludoviciana, Vesicaria ludoviciana |
Name authority | (A. Gray) O’Kane & Al-Shehbaz: Novon 12: 323. (2002) | (Nuttall) O’Kane & Al-Shehbaz: Novon 12: 325. (2002) |
Web links |