Physaria saximontana |
Physaria grahamii |
|||||
---|---|---|---|---|---|---|
Fremont County twinpod, Rocky Mountain or Fremont County twinpod |
Graham's twinpod |
|||||
Habit | Perennials; caudex usually simple; (silvery) pubescent throughout, trichome rays furcate. | Perennials; caudex branched, (thick, cespitose); densely pubescent, trichomes rays (appressed on leaves, ascending on pedicels and fruits), distinct, furcate or bifurcate. | ||||
Stems | several from base, prostrate to decumbent, 0.3–1 dm. |
several from base, decumbent to erect or ascending (unbranched), 1–2.5 dm. |
||||
Basal leaves | (rosulate; petiole winged); blade orbicular to broadly obovate, 1.5–3 cm, margins entire or with broad, obscure toothlike angles each side at apex, (apex obtuse, surfaces densely pubescent, trichomes appressed). |
(outer ones spreading, inner erect or ascending); blade ovate, often broadly so, 4–7 cm, margins repand to lyrate-lobed. |
||||
Cauline leaves | blade broadly spatulate to linear-oblanceolate, 1–1.5 cm, margins entire. |
similar to basal, blade oblanceolate or narrowly oblong, reduced in size, (base gibbous). |
||||
Racemes | condensed, (subumbellate to slightly more elongated, few-flowered). |
loose, (elongated). |
||||
Flowers | sepals (yellowish, often with some purple), narrowly lanceolate, 5–6 mm; petals spatulate, 7.3–9.2 mm, (not clawed). |
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). |
||||
Fruiting pedicels | (divaricate-ascending, straight to slightly curved), 6–10 mm. |
(ascending to divaricate-ascending, sigmoid to nearly straight), 10–17 mm. |
||||
Fruits | didymous, irregular, suborbicular, deeply bilobed, inflated in age, 10–12 × 12–15 mm, (papery, basal sinus absent or obsolete, apical sinus deep); valves (retaining seeds after dehiscence), densely pubescent, trichomes spreading, (ovaries and immature fruit downy); replum narrowly ovate to broadly oblong, not narrowed at middle, as wide as or wider than fruit, apex acute to obtuse; ovules 4 per ovary; style 3–7 mm. |
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. |
||||
Seeds | flattened. |
plump, (suborbicular). |
||||
Physaria saximontana |
Physaria grahamii |
|||||
Phenology | Flowering May–Jun. | |||||
Habitat | Sagebrush, pinyon-juniper, ponderosa pine, Douglas-fir, limber pine communities on clay, or a mixture of shale fragments and clay | |||||
Elevation | 2100-2900 m (6900-9500 ft) | |||||
Distribution |
MT; WY |
UT |
||||
Discussion | Subspecies 2 (2 in the flora). Physaria saximontana (especially subsp. dentata) is morphologically similar to 22. P. didymocarpa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
||||
Key |
|
|||||
Source | FNA vol. 7, p. 661. | FNA vol. 7, p. 642. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. acutifolia var. purpurea, P. acutifolia var. repanda, P. repanda | |||||
Name authority | Rollins: Contr. Gray Herb. 214: 13. (1984) | C. V. Morton: Ann. Carnegie Mus. 26: 220. (1937) | ||||
Web links |