Paronychia pulvinata |
Paronychia wilkinsonii |
|
---|---|---|
Rocky Mountain nailwort |
Wilkinson's nailwort |
|
Habit | Plants perennial, densely cespitose, cushion-forming; caudex much-branched, woody. | Plants perennial, cushion-forming, hirtellous; caudex much-branched, woody. |
Stems | prostrate, much-branched, 5–10 cm, puberulent. |
erect to ascending, much-branched, 4–10 cm, hirtellous. |
Leaves | stipules ovate, 3–6 mm, apex subobtuse, entire; blade narrowly elliptic-oblong or oblong to narrowly elliptic-oblanceolate, 2–5 × 0.2–1.8(–2) mm, fleshy, apex obtuse to subacute, glabrous. |
stipules lanceolate, 5–8 mm, apex acuminate, often deeply cleft; blade lanceolate, 5–9 × 0.75–1.1 mm, leathery, apex pungently mucronate, minutely hirtellous to puberulent. |
Flowers | mostly solitary at end of shoots, almost concealed by leaves.; flowers 5-merous, elliptic-oblong, with enlarged hypanthium and calyx straight to tapering distally, 2.5–2.8 mm, densely appressed-puberulent, sparsely so distally; sepals whitish to green, veins absent, narrowly oblong to ovate-oblong, 1.5–1.7 mm, papery to herbaceous, margins white, 0.2–0.3 mm wide, papery, apex with subterminal awn, hood ascending as continuation of sepal, broadly rounded to notched, awn erect, white, 0.3–0.6(–1) mm, ± glabrous spine; staminodes filiform, 0.7–0.9 mm; style 1, cleft in distal 1/3, 0.8–1 mm. |
5-merous, ± short-campanulate, with enlarged hypanthium and calyx slightly constricted then widening distally, 3.3–4.5 mm, puberulent with mostly ascending hairs; sepals red-brown, midrib and lateral pair of veins absent to evident, oblong, 1.7–2 mm, leathery to rigid, margins white, 0.2–0.3 mm wide, papery to scarious, apex terminated by awn, hood ± obscure, broadly rounded, awn moderately divergent, white, ± lanceoloid, 1.4–2.1 mm, scabrous, distinct spine absent; staminodes ± triangular, 0.2–0.4 mm; styles 2, 0.5–0.7 mm. |
Utricles | ovoid, 1.3–1.5 mm, smooth, glabrous. |
subglobose to ± 4-angular, 1.2–1.3 mm, papillate distally. |
Cymes | terminal and subterminal, 3–7(–10)-flowered, densely congested, forming large and conspicuous glomerules 5–15 mm wide. |
|
2n | = 32. |
|
Paronychia pulvinata |
Paronychia wilkinsonii |
|
Phenology | Flowering summer. | Flowering spring–fall. |
Habitat | Rocky slopes and summit screes in alpine regions | Dry, rocky hills, gravelly slopes and summits |
Elevation | 3300-4200 m (10800-13800 ft) | 1200-1600 m. (3900-5200 ft.) |
Distribution |
CO; UT; WY
|
TX; Mexico (Chihuahua, Coahuila) |
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 5, p. 40. | FNA vol. 5, p. 43. |
Parent taxa | Caryophyllaceae > subfam. Paronychioideae > Paronychia | Caryophyllaceae > subfam. Paronychioideae > Paronychia |
Sibling taxa | ||
Synonyms | P. pulvinata var. longiaristata | |
Name authority | A. Gray: Proc. Acad. Nat. Sci. Philadelphia 15: 58. (1864) | S. Watson: Proc. Amer. Acad. Arts 21: 454. (1886) |
Web links |