Physaria subumbellata |
Physaria navajoensis |
|
---|---|---|
parasol bladderpod |
Navajo bladderpod |
|
Habit | Perennials; caudex simple or branched, (usually covered with persistent leaf bases, cespitose); densely pubescent, trichomes (closely appressed), rays distinct, usually bifurcate. | Perennials; caudex branched, (woody, pulvinate-cespitose, forming hard, hemispherical mats, basal parts covered with persistent leaf bases); densely (silvery gray) pubescent, trichomes mostly 5-rayed, rays bifurcate, slightly fused at base, (umbonate, strongly tuberculate except nearly smooth over umbo). |
Stems | several from base, erect, (unbranched, slender), 0.1–0.6 dm. |
several from base (crowded), erect, not exceeding leaves. |
Basal leaves | blade rhombic to obovate, 2–4 cm, margins entire. |
usually absent. |
Cauline leaves | blade linear-oblanceolate, similar to basal. |
(petiole not differentiated from blade); blade linear-oblanceolate, 3–8(–13) mm, margins entire. |
Racemes | dense (distally, subumbellate). |
(secund), dense, corymbose, (few-flowered, not or barely exceeding leaves). |
Flowers | sepals (yellowish), oblong to elliptic, 3.5–7 mm, (median pair usually thickened apically, cucullate); petals lingulate to spatulate, 4–7 mm. |
sepals (yellow-green), linear to narrowly triangular, 3.7–4.8 mm, (lateral pair subsaccate); petals (deep yellow, slightly orange in center), spatulate, 5.2–6.5 mm, (claw joined at right angle). |
Fruiting pedicels | (divaricate-ascending), 3–5 mm, (densely pubescent). |
(ascending to divaricate-ascending, straight), 3.5–6 mm. |
Fruits | (erect), ovate to suborbicular, compressed apically (latiseptate), 3–4 mm; valves pubescent; replum ovate to obovate; ovules 4–6 per ovary; style 2–3 mm. |
(becoming reddish or copper-colored in age), ovate, often slightly compressed (at margins apically), 3–5 mm, (apex acute); valves (not retaining seeds after dehiscence), glabrous; (septum perforate or not); ovules 4–8 per ovary; style 1.8–3 mm. |
Seeds | plump. |
plump or slightly flattened, (strongly mucilaginous). |
2n | = 10. |
|
Physaria subumbellata |
Physaria navajoensis |
|
Phenology | Flowering Apr–Jun. | Flowering May-early Jun. |
Habitat | Rocky high ridges, gravel and stony areas, juniper covered knolls, rock crevices, clay hillsides, pinyon-juniper areas, calcareous substrates | Pinyon-juniper communities on nearly barren outcrops of Todilto Limestone |
Elevation | 1600-2700 m (5200-8900 ft) | 2200-2400 m (7200-7900 ft) |
Distribution |
CO; UT; WY
|
AZ; NM |
Discussion | Of conservation concern. Physaria navajoensis is morphologically similar to 85. P. tumulosa of southern Utah, differing subtly. Physaria navajoensis has petals slightly orange at the junction of blade and claw, a sharp bend at that junction giving the flower a flat-topped appearance, and strongly mucilaginous seeds. Physaria tumulosa has pure yellow petals that gently flex at the junction of blade and claw, and seeds that are not mucilaginous. Molecular data (pers. obs.) show that these two species are not directly related. A population of plants on Deer Spring Point, Kane County, Utah, appears to be this species, but molecular data indicate that it is probably a hybrid between P. tumulosa and, most likely, P. intermedia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 7, p. 663. | FNA vol. 7, p. 651. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Lesquerella subumbellata | Lesquerella navajoensis |
Name authority | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 328. (2002) | (O’Kane) O’Kane & Al-Shehbaz: Novon 12: 325. (2002) |
Web links |