Physaria vitulifera |
Physaria rollinsii |
|
---|---|---|
roundtip twinpod |
Rollins' twinpod |
|
Habit | Perennials; caudex simple or branched, (cespitose); (silvery) pubescent throughout, trichomes several-rayed, rays furcate or bifurcate, (relatively massive, smooth to few-tubercled). | Perennials; (compact); caudex usually simple, (cespitose); (silvery) pubescent throughout, trichomes 6–8-rayed, rays furcate near base, fused at base, (umbonate, strongly tuberculate throughout). |
Stems | several from base, usually decumbent to ascending, (arising laterally, unbranched, coarse), 1–2 dm. |
several from base, decumbent, (unbranched, slender), 0.5–1 dm. |
Basal leaves | blade pandurate or obovate, 3–6 cm, margins usually deeply and broadly incised, rarely subentire, (apex obtuse). |
(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). |
Cauline leaves | blade oblanceolate to spatulate, similar to basal, (3–6 mm wide), margins entire, (apex often somewhat acute). |
blade oblanceolate, 1–1.5 cm (width 2–4 mm), margins entire, (apex acute). |
Racemes | congested, (elongated in fruit). |
congested, (elongated moderately in fruit). |
Flowers | sepals oblong, 6–8 mm; petals spatulate, to 10 mm. |
sepals linear, 5–7 mm; petals spatulate, 8–10 mm, (apex often somewhat truncate). |
Fruiting pedicels | (usually curving upward, sigmoid), 6–10 mm. |
(spreading, straight or somewhat sigmoid), 5–8 mm. |
Fruits | didymous, irregular in shape, somewhat angular, inflated, 5–7 × 6–8 mm, (papery, often rigid, base obtuse or truncate, apical sinus broad, open and deep); valves (retaining seeds after dehiscence), pubescent, trichomes spreading, loose; replum oblong, often constricted, as wide as or wider than fruit, apex obtuse; ovules 4 per ovary; style 5–7 mm. |
(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. |
Seeds | flattened. |
slightly flattened. |
2n | = 8, 16. |
= 8. |
Physaria vitulifera |
Physaria rollinsii |
|
Phenology | Flowering Apr–Jun. | Flowering May–Jun. |
Habitat | Rocky hillsides, dry banks, gravel and sand, granitic slopes, soil scree, red shale | Sagebrush, granitic talus, open knolls, limestone chiprock, steep slopes, clay banks, near granite boulders |
Elevation | 1600-3000 m (5200-9800 ft) | 2300-2500(-3900) m (7500-8200(-12800) ft) |
Distribution |
CO
|
CO
|
Source | FNA vol. 7, p. 665. | FNA vol. 7, p. 661. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Name authority | Rydberg: Bull. Torrey Bot. Club 28: 278. (1901) | G. A. Mulligan: Canad. J. Bot. 44: 1663, fig. 2, plate 1, fig. 4. (1966) |
Web links |