Physaria rollinsii |
Physaria reediana |
|
---|---|---|
Rollins' twinpod |
alpine bladderpod, reed's twinpod, Rollins' 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 simple or branched, (covered with persistent leaf bases, loosely cespitose); densely pubescent, trichomes (appressed to ascending, plant appearing shaggy, always appressed on fruits), 4- or 5-rayed, rays furcate or bifurcate, (tuberculate throughout). |
Stems | several from base, decumbent, (unbranched, slender), 0.5–1 dm. |
few to several from base, ± erect, (arising laterally, also from within basal leaves), 0.2–0.4 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). |
(erect); blade linear-oblanceolate, 1.2–2.8 cm, (base gradually narrowed to petiole), margins entire. |
Cauline leaves | blade oblanceolate, 1–1.5 cm (width 2–4 mm), margins entire, (apex acute). |
blade linear, similar to basal. |
Racemes | congested, (elongated moderately in fruit). |
dense, (often subumbellate, not or barely exceeding basal leaves). |
Flowers | sepals linear, 5–7 mm; petals spatulate, 8–10 mm, (apex often somewhat truncate). |
sepals (pale green-yellow), oblong to elliptic, 4–5 mm, (median pair usually thickened apically, cucullate); petals lingulate, 6–9 mm. |
Fruiting pedicels | (spreading, straight or somewhat sigmoid), 5–8 mm. |
(ascending, curved), 3–5.5 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. |
lanceolate in outline, compressed (latiseptate) on margins and at apex, 4–5 mm; valves pubescent, trichomes closely appressed; ovules 8–12 per ovary; style 3.5–4.5 mm (equaling or exceeding length of fruit, curved proximal to stigma). |
Seeds | slightly flattened. |
plump, (oblong). |
2n | = 8. |
|
Physaria rollinsii |
Physaria reediana |
|
Phenology | Flowering May–Jun. | Flowering May–Jul. |
Habitat | Sagebrush, granitic talus, open knolls, limestone chiprock, steep slopes, clay banks, near granite boulders | Open areas of grasslands on calcareous soils |
Elevation | 2300-2500(-3900) m (7500-8200(-12800) ft) | 1200-1900 m (3900-6200 ft) |
Distribution |
CO
|
CO; NE; WY
|
Source | FNA vol. 7, p. 661. | FNA vol. 7, p. 660. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Vesicaria alpina, Alyssum alpinum, Lesquerella alpina, Lesquerella alpina var. laevis, Lesquerella condensata var. laevis | |
Name authority | G. A. Mulligan: Canad. J. Bot. 44: 1663, fig. 2, plate 1, fig. 4. (1966) | O’Kane & Al-Shehbaz: Novon 12: 327. (2002) |
Web links |