Physaria pycnantha |
Physaria arizonica |
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mountain-view bladderpod |
Arizona bladderpod |
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Habit | Perennials; caudex branched, (densely cespitose and forming hemispheric mounds); densely pubescent, trichomes 5-rayed, rays bifurcate near base, fused at base, (strongly tuberculate throughout). | Perennials; caudex branched, (cespitose); densely (silvery gray) pubescent, trichomes (sessile or subsessile), (4-), 6-, or 8-rayed, rays fused at base, furcate or bifurcate, (slightly umbonate, tuberculate throughout). |
Stems | few to several from base, erect, (usually exceeding basal leaves), 0.3–0.7 dm. |
simple or few to several from base, erect, (unbranched, slender), 0.2–1(–1.5) dm. |
Basal leaves | blade linear-spatulate, 1.5–4 cm, (base narrowed gradually to petiole), margins entire. |
(densely tufted, not rosulate, reflexed in age); blade obovate to oblanceolate, 0.7–2(–3) cm, margins usually entire, sometimes repand or shallowly dentate, (apex acute). |
Cauline leaves | blade spatulate, similar to basal. |
similar to basal, becoming narrower distally, somewhat reflexed, (distal) blade linear or narrowly oblanceolate, 0.5–2.5(–5.5) cm. |
Racemes | crowded in distal 1/3, (4–10-flowered). |
dense, often subcorymbiform. |
Flowers | sepals (pale yellow), oblong to elliptic, 3–4 mm, (median pair usually thickened apically, cucullate); petals (sometimes with slight tinge of orange basally), lingulate, 4–6 mm. |
sepals (green or greenish yellow), ovate or broadly ovate, 3.5–6.5 mm, (lateral pair subsaccate, cucullate, median pair thickened, slightly cucullate apically); petals (spreading), oblanceolate to obovate, 5.5–8(–10) mm, (claw erect). |
Fruiting pedicels | (loosely to strongly sigmoid), 6–10 mm. |
(erect or divaricate-spreading, straight or slightly curved), (3–)5–10(–15) mm. |
Fruits | ellipsoid, slightly inflated (somewhat latiseptate), 4–5 mm, (apex acute); valves pubescent, trichomes erect, appearing slightly shaggy; ovules 4–8 per ovary; styles 2.5–3 mm, (shorter than mature fruits). |
(sessile or substipitate), suborbicular to ovoid or ellipsoid, slightly inflated, 4–7 mm; valves pubescent outside, trichomes substipitate, spreading, sometimes sparsely pubescent inside, trichomes sessile, smooth; ovules 4–10(–16) per ovary; style (0.5–)1–2(–4) mm (shorter than fruit). |
Seeds | ± flattened, convex on outer side. |
flattened. |
2n | = 10. |
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Physaria pycnantha |
Physaria arizonica |
|
Phenology | Flowering late May–Jun(-Jul). | Flowering Apr–Jun. |
Habitat | Dry, windswept knolls of limestone gravel, with other cushion-forming plants | Sandy and gravelly soils, limey knolls or limestone chip, often in open stands of sagebrush-pinyon, pinyon-juniper, Gambel oak and sometimes ponderosa pine |
Elevation | 1600-2300 m (5200-7500 ft) | 1000-2200 m (3300-7200 ft) |
Distribution |
ID; MT
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AZ; UT
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Discussion | Physaria pycnantha is morphologically similar to 56. P. nelsonii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The circumscription of Physaria arizonica here is quite broad and includes plants that have densely tufted basal leaves and relatively few or no cauline leaves; plants that are loosely tufted and have several cauline leaves; and plants that have a strongly branched caudex, leafy stems, and sterile shoots (var. andrusensis). Additional study is needed to understand the pattern of variation in this complex species; all of the characters given above vary considerably. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 659. | FNA vol. 7, p. 627. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Lesquerella arizonica, Lesquerella arizonica var. nudicaulis, P. arizonica var. andrusensis | |
Name authority | Grady & O’Kane: Novon 17: 188, fig. 5. (2007) | (S. Watson) O’Kane & Al-Shehbaz: Novon 12: 321. (2002) |
Web links |