Physaria newberryi |
Physaria pulvinata |
|||||
---|---|---|---|---|---|---|
Newberry twinpod, Newberry's twinpod |
cushion bladderpod |
|||||
Habit | Perennials; caudex simple or branched, (branches often covered with persistent leaf bases, cespitose); densely (silvery) pubescent, trichomes rays fused at least 1/2 their length. | Perennials; caudex (buried), branched, (dense, forming hard mats); densely pubescent, trichomes (subsessile), 8–13-rayed, rays usually furcate, distinct, (umbonate, usually tuberculate, less so over umbo). | ||||
Stems | several from base, ascending to erect (arising laterally, unbranched), 0.5–1(–2.5) dm. |
several (to several hundred) from base, erect, (each terminating in a tufted cluster of leaves), to 7 dm. |
||||
Basal leaves | (ascending to erect, petiole slender); blade oblanceolate to obovate, 3–8 cm, (base tapering to petiole), margins incised or dentate with broad teeth, (apex acute to obtuse). |
(petiole not differentiated from blade); blade narrowly elliptic to narrowly linear-oblanceolate, (0.8–)1–1.5 cm, (base cuneate), margins entire. |
||||
Cauline leaves | blade linear-oblanceolate to oblanceolate, 1–2 cm, margins entire. |
similar to basal, blade sometimes linear, (apex acute). |
||||
Racemes | dense (elongated or not in fruit, 2.5–8.5(–10) cm). |
dense, (often ± subumbellate, somewhat elongated in fruit). |
||||
Flowers | sepals (greenish yellow), lanceolate, 6–8.5 mm, (saccate and cucullate); petals spatulate to narrowly oblanceolate, 7–10(–12) mm. |
sepals narrowly elliptic, 2.5–3.5(–4) mm, (not keeled); petals narrowly spatulate, 4–7 mm. |
||||
Fruiting pedicels | (divaricate, straight), 5–11(–15) mm, (rigid, fruits not pendent on arching pedicels). |
(strongly sigmoid), 5–10 mm. |
||||
Fruits | didymous, sides curved and angular, highly inflated, 6–16 × 8–12 mm, (papery, apical sinus broad and concave); valves (retaining seeds after dehiscence, distinctly 2-keeled on side away from replum), pubescent, trichomes appressed; replum linear to linear-lanceolate, as wide as or wider than fruit, apex acute; ovules 4–8 per ovary; style 2–9 mm, (usually not exceeding sinus). |
ellipsoid, compressed, 4–6 mm; valves densely pubescent, trichomes appressed; ovules 2 per ovary; style 2–3.5 mm. |
||||
Seeds | slightly flattened, (ovate). |
flattened, (oval). |
||||
Physaria newberryi |
Physaria pulvinata |
|||||
Phenology | Flowering late May–Jun. | |||||
Habitat | Gray, argillaceous shale outcrops with sagebrush and junipers | |||||
Elevation | 2300-2600 m (7500-8500 ft) | |||||
Distribution |
AZ; NM; NV; UT
|
CO |
||||
Discussion | Subspecies 2 (2 in the flora). Physaria newberryi, with its unusual fruits, can be confused with 15. P. chambersii. In P. chambersii, the sides of the fruit are flat, the style always exceeds the top, or shoulders, of the fruit, and shoulders form an angle that does not curve in toward the style. In P. newberryi, the sides of the fruit are concave, the styles are shorter than shoulders of the silicle (except in subsp. yesicola), and shoulders of the silicle form a curved, inward arching crown on the fruit. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Physaria pulvinata is known from an area surrounded by a pygmy forest of Utah juniper in Dolores and San Miguel Counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 7, p. 652. | FNA vol. 7, p. 659. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. didymocarpa var. newberryi | |||||
Name authority | A. Gray: in J. C. Ives, Rep. Colorado R. 4: 6. (1861) | O’Kane & Reveal: Brittonia 58: 74, fig. 1. (2006) | ||||
Web links |