Physaria rollinsii |
Physaria pachyphylla |
|
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Rollins' twinpod |
thick-leaf bladderpod |
|
Habit | Perennials; (compact); caudex usually simple, (cespitose); (silvery) pubescent throughout, trichomes 6–8-rayed, rays furcate near base, fused at base, (umbonate, strongly tuberculate throughout). | Perennials; caudex usually simple, rarely branched, (loosely mounded, rosette-like growth); densely (silvery or gray) pubescent, trichomes (sessile), 5-rayed, rays bifurcate, slightly fused near base of main rays, (tuberculate throughout, less over umbo). |
Stems | several from base, decumbent, (unbranched, slender), 0.5–1 dm. |
several from base, decumbent to prostrate, (well-exserted beyond basal leaves), 0.2–0.5 dm. |
Basal leaves | (strongly rosulate); blade usually oblanceolate or broader, sometimes triangular, 2–3.5 cm (width 5–10 mm), margins entire or with 1 or 2 broad teeth, (apex acute). |
(petiole differentiated from blade); blade (slightly cupped, leathery, nearly 1 mm thick), oblanceolate to orbicular, 1.2–2 cm, margins entire, (apex acute). |
Cauline leaves | blade oblanceolate, 1–1.5 cm (width 2–4 mm), margins entire, (apex acute). |
blade spatulate, similar to basal. |
Racemes | congested, (elongated moderately in fruit). |
dense, (subumbellate). |
Flowers | sepals linear, 5–7 mm; petals spatulate, 8–10 mm, (apex often somewhat truncate). |
sepals (pale yellow), elliptic to oblong, 3.5–4.0 mm, (median pair somewhat thickened apically, cucullate); petals lingulate, 5–6 mm. |
Fruiting pedicels | (spreading, straight or somewhat sigmoid), 5–8 mm. |
(ascending, curved), 5–7 mm. |
Fruits | (erect), didymous, suborbicular, inflated, 2–5(–8) × 4–8(–10)mm, (coriaceous, base slightly cordate or nearly obtuse, sinus obsolete or absent, apical sinus broad and deep); valves (retaining seeds after dehiscence), pubescent, trichomes appressed, (silvery on ovaries and immature fruit); replum obovate to oblong, as wide as or wider than fruit, rarely somewhat constricted basally, apex obtuse; ovules 4 per ovary; style 5–7 mm. |
globose or ellipsoid, slightly inflated (with slight apical constriction), 3–6 mm; valves pubescent, trichomes closely appressed; ovules 8 per ovary; style 1–3 mm (shorter than mature fruit). |
Seeds | slightly flattened. |
plump, (oblong). |
2n | = 8. |
|
Physaria rollinsii |
Physaria pachyphylla |
|
Phenology | Flowering May–Jun. | Flowering Jun–Jul. |
Habitat | Sagebrush, granitic talus, open knolls, limestone chiprock, steep slopes, clay banks, near granite boulders | Barren areas of mixed white, pink, or reddish limestone and diatomaceous earth |
Elevation | 2300-2500(-3900) m (7500-8200(-12800) ft) | 1300-1600 m (4300-5200 ft) |
Distribution |
CO
|
MT |
Discussion | Of conservation concern. Physaria pachyphylla is known from the Pryor Mountain Desert near the Wyoming state line. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 7, p. 661. | FNA vol. 7, p. 656. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Name authority | G. A. Mulligan: Canad. J. Bot. 44: 1663, fig. 2, plate 1, fig. 4. (1966) | O’Kane & Grady: Novon 17: 187, fig. 4. (2007) |
Web links |