Physaria rollinsii |
Physaria brassicoides |
|
---|---|---|
Rollins' twinpod |
double bladderpod, double twinpod |
|
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; (somewhat compact); caudex branched, (relatively large); (silvery) pubescent throughout, trichomes (sessile), several-rayed, rays furcate, (slightly umbonate, tuberculate throughout). |
Stems | several from base, decumbent, (unbranched, slender), 0.5–1 dm. |
several from base, decumbent to ascending (arising laterally, unbranched, stout), (0.2–)0.5–1.7 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 somewhat winged); blades orbicular to obovate, 2–6 cm (width 1–2.5 cm, thick), margins usually repand, rarely entire, (adaxial surface scurfy). |
Cauline leaves | blade oblanceolate, 1–1.5 cm (width 2–4 mm), margins entire, (apex acute). |
blade oblanceolate to broadly spatulate, 1–2 cm (width 3–5 mm), margins entire, (apex obtuse to subacute). |
Racemes | congested, (elongated moderately in fruit). |
moderately dense (or elongated). |
Flowers | sepals linear, 5–7 mm; petals spatulate, 8–10 mm, (apex often somewhat truncate). |
sepals linear-oblong, 6–8 mm; petals spatulate, 9–12 mm. |
Fruiting pedicels | (spreading, straight or somewhat sigmoid), 5–8 mm. |
(divergent, straight to somewhat curved or sigmoid), 5–12 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. |
(erect), didymous, cordate, moderately inflated, (6–)10–20 × 10–23 mm, (papery, base obtuse or with obscure sinus, apical sinus deep, broad); valves (retaining seeds after dehiscence), densely and loosely pubescent, trichomes spreading; replum linear-oblong, constricted, as wide as or wider than fruit; ovules 4 per ovary; style 4–5(–9) mm. |
Seeds | slightly flattened. |
plump, (broad). |
2n | = 8. |
= 8, 16. |
Physaria rollinsii |
Physaria brassicoides |
|
Phenology | Flowering May–Jun. | Flowering May–Jun. |
Habitat | Sagebrush, granitic talus, open knolls, limestone chiprock, steep slopes, clay banks, near granite boulders | Bare hillsides, dry gravel and clay soil, badlands, clay knolls, banks |
Elevation | 2300-2500(-3900) m (7500-8200(-12800) ft) | 900-1400 m (3000-4600 ft) |
Distribution |
CO
|
CO; MT; ND; NE; SD; WY
|
Source | FNA vol. 7, p. 661. | FNA vol. 7, p. 628. |
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) | Rydberg: Bull. Torrey Bot. Club 29: 237. (1902) |
Web links |