Physaria grahamii |
Physaria vitulifera |
|
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Graham's twinpod |
roundtip twinpod |
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Habit | Perennials; caudex branched, (thick, cespitose); densely pubescent, trichomes rays (appressed on leaves, ascending on pedicels and fruits), distinct, furcate or bifurcate. | Perennials; caudex simple or branched, (cespitose); (silvery) pubescent throughout, trichomes several-rayed, rays furcate or bifurcate, (relatively massive, smooth to few-tubercled). |
Stems | several from base, decumbent to erect or ascending (unbranched), 1–2.5 dm. |
several from base, usually decumbent to ascending, (arising laterally, unbranched, coarse), 1–2 dm. |
Basal leaves | (outer ones spreading, inner erect or ascending); blade ovate, often broadly so, 4–7 cm, margins repand to lyrate-lobed. |
blade pandurate or obovate, 3–6 cm, margins usually deeply and broadly incised, rarely subentire, (apex obtuse). |
Cauline leaves | similar to basal, blade oblanceolate or narrowly oblong, reduced in size, (base gibbous). |
blade oblanceolate to spatulate, similar to basal, (3–6 mm wide), margins entire, (apex often somewhat acute). |
Racemes | loose, (elongated). |
congested, (elongated in fruit). |
Flowers | sepals lanceolate or narrowly oblong, 5.8–7.2 mm; petals (erect, sometime purplish or drying purple), narrowly oblong to oblanceolate, 7–10 mm, (not or weakly clawed). |
sepals oblong, 6–8 mm; petals spatulate, to 10 mm. |
Fruiting pedicels | (ascending to divaricate-ascending, sigmoid to nearly straight), 10–17 mm. |
(usually curving upward, sigmoid), 6–10 mm. |
Fruits | didymous, globose or subglobose, inflated, 10–13 mm, (papery, basal and apical sinuses deep); valves (retaining seeds after dehiscence), pubescent, trichomes ascending, appearing fuzzy; replum oblong to oblanceolate, as wide as or wider than fruit, apex obtuse; ovules 4 per ovary; style (4–)5–7 mm. |
didymous, irregular in shape, somewhat angular, inflated, 5–7 × 6–8 mm, (papery, often rigid, base obtuse or truncate, apical sinus broad, open and deep); valves (retaining seeds after dehiscence), pubescent, trichomes spreading, loose; replum oblong, often constricted, as wide as or wider than fruit, apex obtuse; ovules 4 per ovary; style 5–7 mm. |
Seeds | plump, (suborbicular). |
flattened. |
2n | = 8, 16. |
|
Physaria grahamii |
Physaria vitulifera |
|
Phenology | Flowering May–Jun. | Flowering Apr–Jun. |
Habitat | Sagebrush, pinyon-juniper, ponderosa pine, Douglas-fir, limber pine communities on clay, or a mixture of shale fragments and clay | Rocky hillsides, dry banks, gravel and sand, granitic slopes, soil scree, red shale |
Elevation | 2100-2900 m (6900-9500 ft) | 1600-3000 m (5200-9800 ft) |
Distribution |
UT |
CO
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Discussion | Physaria grahamii is difficult to evaluate due to the paucity of collections. The tentative recognition by N. H. Holmgren (2005b) is followed here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 7, p. 642. | FNA vol. 7, p. 665. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | P. acutifolia var. purpurea, P. acutifolia var. repanda, P. repanda | |
Name authority | C. V. Morton: Ann. Carnegie Mus. 26: 220. (1937) | Rydberg: Bull. Torrey Bot. Club 28: 278. (1901) |
Web links |