Physaria floribunda |
Physaria humilis |
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point-tip twinpod |
St. Mary's Peak or bitterroot bladderpod |
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Habit | Perennials; caudex branched, (cespitose); (silvery) pubescent throughout, trichomes several-rayed, rays mostly furcate, (arms of unequal lengths, finely tuberculate). | Perennials; caudex simple, (thickened with persistent leaf bases); densely (silvery) pubescent, trichomes 5- or 6-rayed, rays furcate or 3-branched. | ||||
Stems | several from base, erect or lateral decumbent, (unbranched), 1–2 dm. |
simple or few to several from base, prostrate, (from below a terminal rosette of leaves, unbranched), 0.2–0.5 dm. |
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Basal leaves | (petiole usually winged); blade broadly oblanceolate, 3–8 cm, margins usually dentate or pinnatifid, rarely subentire, (terminal lobe acute or obtuse, not rounded). |
blade elliptic to broadly ovate or obovate, (1–)1.5–2.5(–3) cm, margins entire, (apex obtuse). |
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Cauline leaves | blade spatulate to linear-oblanceolate, 1–3 cm, margins usually entire, rarely toothed, (apex acute). |
blade spatulate, 3–7 mm, (base cuneate), margins entire. |
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Racemes | loose (and greatly elongated in fruit) to congested. |
not loose, (scarcely elongated in fruit, 3–5-flowered). |
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Flowers | sepals linear-oblong, 5–7 mm; petals spatulate, 9–11 mm. |
sepals (yellow-green), narrowly elliptic to narrowly long-triangular, 3.7–5 mm; petals oblanceolate to nearly obovate, 7–8.5 mm, (abruptly tapering to narrow claw). |
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Fruiting pedicels | (recurved), 6–15 mm. |
(straight or slightly curved). |
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Fruits | (usually pendent on arching pedicels, less frequently widely divergent), irregular in shape, (base obtuse or slightly cordate, apex deeply and broadly notched), not strongly inflated, 8–11 × 8–12 mm, (papery); valves retaining seeds after dehiscence; replum linear-oblong, constricted, 2.5–4 mm, as wide as or wider than fruit, apex obtuse; ovules 4 per ovary; style 5–8 mm. |
wider than long, apex truncate to shallowly notched, compressed (angustiseptate), 3–4 mm; valves densely pubescent, trichomes ascending to erect, sparsely pubescent inside; ovules 4 per ovary; style 2–3 mm. |
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Seeds | flattened. |
plump, (slightly compressed). |
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Physaria floribunda |
Physaria humilis |
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Phenology | Flowering Jun-early Aug. | |||||
Habitat | Steep slopes, dry summits, rocky fellfields, dry ledges | |||||
Elevation | 2700-2900 m (8900-9500 ft) | |||||
Distribution |
CO; NM
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MT |
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Physaria humilis is found in metamorphosed rock and detritus on the peaks of the Bitterroot Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 637. | FNA vol. 7, p. 644. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Lesquerella humilis | |||||
Name authority | Rydberg: Bull. Torrey Bot. Club 28: 279. (1901) | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 324. (2002) | ||||
Web links |