Physaria kingii |
Physaria sessilis |
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King bladderpod, King's bladder-pod |
sessile bladderpod |
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Habit | Perennials; caudex usually simple, sometimes branched, (not thickened); usually densely pubescent, trichomes (sessile or short-stalked), 3–7-rayed, rays distinct or slightly fused at base, typically furcate near base, bifurcate or 3-partite, (not to slightly umbonate, smooth or moderately to strongly tuberculate). | Annuals or biennials; with a fine taproot; densely pubescent, trichomes (sessile or short-stalked), 4–6-rayed, rays usually furcate, rarely bifurcate, (moderately tuberculate or nearly smooth). | ||||||||||||||||||||||||
Stems | few to several from base, prostrate to decumbent or erect, 0.5–2(–4) dm. |
simple or few to several from base, erect, (often distal 1/2 branched), to 6 dm. |
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Basal leaves | blade suborbicular to narrowly or broadly oblanceolate to broadly elliptic or rhombic, (1.2–)2–6(–8) cm, (base usually abruptly narrowed to petiole), margins entire, sinuate, or lobed. |
blade oblanceolate, to 9 cm, margins entire, dentate, or sinuate to lyrate-pinnatifid. |
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Cauline leaves | (proximal petiolate, distal sessile); blade obovate or elliptic to spatulate, 0.5–2 cm, margins entire. |
(proximal shortly petiolate, distal sessile); blade narrowly elliptic to linear, 2–4(–6) cm, margins entire or repand to shallowly dentate. |
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Racemes | (usually not secund), dense, (sometimes elongated in fruit). |
loose. |
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Flowers | sepals lanceolate, 4–6(–7) mm; petals (yellow, cream-yellow, cream-white, or white), obovate to oblanceolate, 6–13 mm, (claw weakly differentiated from blade). |
sepals elliptic or elongate-ovate, 3.4–5.2(–6.5) mm, (lateral pair subsaccate, median pair thickened apically, cucullate); petals obovate or deltate, 5–10 mm, (sometimes with short claw, margins undulate). |
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Fruiting pedicels | (erect to divaricate-ascending or recurved, erect in distal 1/3, usually sigmoid, sometimes straight or slightly curved), 4.5–10(–15) mm. |
(divaricate-ascending to widely spreading, straight), 8–20 mm. |
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Fruits | (sessile or substipitate), subglobose, obovoid, or ellipsoid, compressed (sometimes slightly angustiseptate), 3–9 mm, (rigid, apex truncate, retuse, or rounded-acute); valves sparsely or densely pubescent, sometimes sparsely pubescent inside; (septum sometimes fenestrate, perforate, or obsolete); ovules 4–16 per ovary; style 1–9 mm. |
globose or subglobose, sometimes slightly compressed, 3–6 mm; valves (not retaining seeds after dehiscence), densely papillose, densely pubescent inside, trichomes raised; replum as wide as or wider than fruit; ovules 8–18 per ovary; style 1.5–3.5 mm. |
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Seeds | flattened (sometimes slightly). |
flattened. |
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2n | = 12. |
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Physaria kingii |
Physaria sessilis |
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Phenology | Flowering and fruiting Apr–Jun. | |||||||||||||||||||||||||
Habitat | Limestone chip, black soils, grassy roadsides, fields, limestone, oak woodlands, mesquite brush lands, pastures, open dry hills | |||||||||||||||||||||||||
Elevation | 30-700 m (100-2300 ft) | |||||||||||||||||||||||||
Distribution |
AZ; CA; ID; NV; OR; UT; nw Mexico
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TX |
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Discussion | Subspecies 7 (7 in the flora). The Physaria kingii complex is in need of further study. It is widespread in the western United States, mostly in montane environments. This treatment recognizes a highly variable species with generally well-marked, geographically coherent subspecies. Hybridization may be involved in some of the subspecies, especially in subsp. kaibabensis, where molecular data indicate intra-individual genetic variation (pers. obs.). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 645. | FNA vol. 7, p. 663. | ||||||||||||||||||||||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||
Synonyms | Vesicaria kingii, Lesquerella kingii | Lesquerella gracilis var. sessilis, Lesquerella sessilis | ||||||||||||||||||||||||
Name authority | (S. Watson) O’Kane & Al-Shehbaz: Novon 12: 324. (2002) | (S. Watson) O’Kane & Al-Shehbaz: Novon 12: 328. (2002) | ||||||||||||||||||||||||
Web links |