Physaria ludoviciana |
Physaria angustifolia |
|
---|---|---|
foothill bladderpod, silver bladderpod |
threadleaf bladderpod |
|
Habit | Perennials; caudex simple or branched; densely pubescent, trichomes (sessile or short-stalked), 4–7-rayed, rays usually furcate, sometimes bifurcate, (rough-tuberculate throughout). | Annuals; with a fine taproot; ± densely pubescent, trichomes several-rayed, rays distinct or fused at base, bifurcate, (prominently tuberculate throughout). |
Stems | few from base, erect with outer usually decumbent, 1–3.5(–5) dm. |
simple or few to several from base, erect, (sometimes branched), to 4 dm. |
Basal leaves | (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). |
blade elliptic to rhombic, 3–8 cm, (base narrowing gradually to petiole), margins entire, repand, coarsely toothed, or pinnatifid. |
Cauline leaves | blade narrowly oblanceolate to linear, (1–)2–4(–8) cm, margins flat or involute. |
(proximal often shortly petiolate, distal sessile); blade linear or narrowly obovate, 1.5–6(–10) cm, margins entire, repand, or shallowly toothed. |
Racemes | compact, (elongated and loose in fruit, densely-flowered). |
usually loose. |
Flowers | 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). |
sepals elliptic or ovate, 4–6 mm, (lateral pair usually subsaccate); petals obovate to obdeltate, 6–10 mm, (apex often emarginate). |
Fruiting pedicels | (usually recurved), (5–)10–20(–25) mm. |
(usually divaricate, sometimes horizontal, straight or slightly curved), 8–20 mm. |
Fruits | 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. |
not didymous, ± globose, slightly inflated, 4–6 mm; valves (not retaining seeds after dehiscence), glabrous throughout; replum as wide as or wider than fruit; ovules 4 per ovary; style 2–3.5 mm; (stigma expanded). |
Seeds | slightly flattened. |
flattened, (margined). |
2n | = 10, 20, 30. |
= 10. |
Physaria ludoviciana |
Physaria angustifolia |
|
Phenology | Flowering Apr–Jul(-Aug). | Flowering Apr(-May). |
Habitat | Sandy or gravelly soils, steep hillsides, prairie pastures, clay slopes, limestone outcrops, sand dunes, open plains, sandy bluffs, rocky flats, white tuff sands | Shallow limestone-derived soils, sometimes spreading to disturbed sites |
Elevation | 0-1900 m (0-6200 ft) | 90-300 m (300-1000 ft) |
Distribution |
AZ; CA; CO; IA; IL; KS; MN; MT; ND; NE; NM; NV; OK; SD; UT; WI; WY
|
OK; TX |
Discussion | 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. 649. | FNA vol. 7, p. 625. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Alyssum ludovicianum, Lesquerella ludoviciana, Vesicaria ludoviciana | Vesicaria angustifolia, Lesquerella angustifolia, Lesquerella longifolia |
Name authority | (Nuttall) O’Kane & Al-Shehbaz: Novon 12: 325. (2002) | (Nuttall ex Torrey & A. Gray) O’Kane & Al-Shehbaz: Novon 12: 321. (2002) |
Web links |