Physaria vitulifera |
Physaria fendleri |
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roundtip twinpod |
Fendler bladderpod, Fendler's bladderpod |
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Habit | Perennials; caudex simple or branched, (cespitose); (silvery) pubescent throughout, trichomes several-rayed, rays furcate or bifurcate, (relatively massive, smooth to few-tubercled). | Perennials; caudex branched, (sometimes woody at base); densely (silvery) pubescent, trichomes (sessile or short-stalked), several-rayed, rays not furcate, fused (webbed) ca. 1/2 their length, (tuberculate throughout or tubercles scarce or absent over center). |
Stems | several from base, usually decumbent to ascending, (arising laterally, unbranched, coarse), 1–2 dm. |
several from base, erect or laterally decumbent, (usually unbranched), (0.3–)0.5–2.5(–4) dm. |
Basal leaves | blade pandurate or obovate, 3–6 cm, margins usually deeply and broadly incised, rarely subentire, (apex obtuse). |
blade linear to somewhat elliptic, 1–4(–8) cm, margins entire or coarsely dentate. |
Cauline leaves | blade oblanceolate to spatulate, similar to basal, (3–6 mm wide), margins entire, (apex often somewhat acute). |
(shortly petiolate); blade usually linear to narrowly oblanceolate, rarely elliptic to rhombic, 0.5–2.5 cm, (base narrowing to petiole), margins entire or remotely dentate (sometimes involute). |
Racemes | congested, (elongated in fruit). |
loose to somewhat dense. |
Flowers | sepals oblong, 6–8 mm; petals spatulate, to 10 mm. |
sepals elliptic to oblong, 5–8 mm, (lateral pair not saccate, median pair often thickened apically, ± cucullate); petals (usually orange or orange-yellow at junction of blade and claw, sometimes also with orange guidelines), obdeltate to obovate, 8–12 mm, (claw relatively short). |
Fruiting pedicels | (usually curving upward, sigmoid), 6–10 mm. |
(divaricate-spreading to erect, usually straight or slightly curved, occasionally sigmoid), 8–20(–40) 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. |
globose, broadly ellipsoid, or ovoid, not or slightly inflated, 5–8 mm, (firm, apex usually acute); valves (not retaining seeds after dehiscence, often reddish in age), glabrous throughout; replum as wide as or wider than fruit; ovules (12–)20–32(–40) per ovary; style (2–)3–6 mm. |
Seeds | flattened. |
flattened. |
2n | = 8, 16. |
= 12, 14, 24. |
Physaria vitulifera |
Physaria fendleri |
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Phenology | Flowering Apr–Jun. | Flowering Mar–May. |
Habitat | Rocky hillsides, dry banks, gravel and sand, granitic slopes, soil scree, red shale | Limestone outcrops, gypseous hills, gravels, sandy washes, rocky slopes, bluffs, shallow drainage areas, plains and desert shrub areas |
Elevation | 1600-3000 m (5200-9800 ft) | 100-2000 m (300-6600 ft) |
Distribution |
CO
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AZ; CO; KS; NM; OK; TX; UT; Mexico (Chihuahua, Coahuila, Nuevo León)
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Discussion | In dry areas, Physaria fendleri may flower following suitable rains at any time of the year. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 7, p. 665. | FNA vol. 7, p. 636. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Vesicaria fendleri, Alyssum fendleri, Alyssum stenophyllum, Lesquerella fendleri, Lesquerella foliacea, Lesquerella praecox, Lesquerella stenophylla, Vesicaria stenophylla, Vesicaria stenophylla var. diffusa, Vesicaria stenophylla var. humilis, Vesicaria stenophylla var. procera | |
Name authority | Rydberg: Bull. Torrey Bot. Club 28: 278. (1901) | (A. Gray) O’Kane & Al-Shehbaz: Novon 12: 323. (2002) |
Web links |