Physaria newberryi |
Physaria newberryi subsp. newberryi |
|||||
---|---|---|---|---|---|---|
Newberry twinpod, Newberry's twinpod |
Newberry's twinpod |
|||||
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. | Plants usually not mound-forming. | ||||
Caudex | simple or few-branched (some populations on shifting substrates with elongated branches). |
|||||
Stems | several from base, ascending to erect (arising laterally, unbranched), 0.5–1(–2.5) 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). |
|||||
Cauline leaves | blade linear-oblanceolate to oblanceolate, 1–2 cm, margins entire. |
|||||
Racemes | dense (elongated or not in fruit, 2.5–8.5(–10) cm). |
|||||
Flowers | sepals (greenish yellow), lanceolate, 6–8.5 mm, (saccate and cucullate); petals spatulate to narrowly oblanceolate, 7–10(–12) mm. |
|||||
Styles | less than 4 mm, shorter than fruit sinus. |
|||||
Fruiting pedicels | (divaricate, straight), 5–11(–15) mm, (rigid, fruits not pendent on arching pedicels). |
|||||
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). |
|||||
Seeds | slightly flattened, (ovate). |
|||||
2n | = 8, 16. |
|||||
Physaria newberryi |
Physaria newberryi subsp. newberryi |
|||||
Phenology | Flowering Mar–May. | |||||
Habitat | Low elevation blackbrush, pinyon-juniper, Gambel oak, and ponderosa pine communities | |||||
Elevation | 800-2400 m (2600-7900 ft) | |||||
Distribution |
AZ; NM; NV; UT
|
AZ; NM; NV; UT |
||||
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.) |
Supposed differences between subspp. newberryi and racemosa do not hold up in light of recent collections that show a continuum in replum and raceme lengths. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 7, p. 652. | FNA vol. 7, p. 653. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria > Physaria newberryi | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. didymocarpa var. newberryi | P. newberryi var. racemosa | ||||
Name authority | A. Gray: in J. C. Ives, Rep. Colorado R. 4: 6. (1861) | unknown | ||||
Web links |