Paronychia pulvinata |
Paronychia setacea |
|
---|---|---|
Rocky Mountain nailwort |
bristle nailwort |
|
Habit | Plants perennial, densely cespitose, cushion-forming; caudex much-branched, woody. | Plants annual, biennial, or perennial; taproot filiform to slender. |
Stems | prostrate, much-branched, 5–10 cm, puberulent. |
erect to ascending, much-branched distally, 5–20 cm, finely pubescent to puberulent. |
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, 3–8 mm, apex acuminate, entire; blade linear, 5–20 × 0.3–1 mm, leathery, apex minutely cuspidate, glabrous. |
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 widening distally, 2.4–3.2 mm, moderately pubescent proximately with antrorsely appressed to spreading hairs; sepals green to tan, midrib and lateral pair of veins absent to evident, oblong, 1.2–1.3 mm, leathery to rigid, margins whitish to translucent, 0.05–0.1 mm wide, scarious, apex terminated by awn, hood ± obscure, narrowly rounded, awn widely divergent, 0.6–1.3 mm, broadly conic in proximal 1/3 with white to yellowish, scabrous spine; staminodes subulate, 0.6–0.7 mm; style 1, cleft in distal 1/2, 0.4–0.6 mm. |
Utricles | ovoid, 1.3–1.5 mm, smooth, glabrous. |
ovoid-oblong, 1 mm, smooth, glabrous. |
Cymes | terminal and lateral, 5–20+-flowered, dichasial and rather diffuse, forming clusters 3–15 mm wide. |
|
2n | = 32. |
= 64. |
Paronychia pulvinata |
Paronychia setacea |
|
Phenology | Flowering summer. | Flowering spring–fall. |
Habitat | Rocky slopes and summit screes in alpine regions | Limestone barrens, gravelly or sandy slopes and grasslands |
Elevation | 3300-4200 m (10800-13800 ft) | 30-200 m (100-700 ft) |
Distribution |
CO; UT; WY
|
TX |
Discussion | We could not distinguish Paronychia lundellorum from P. setacea based on features that Turner used for differentiation, nor did we discover any other discriminating characters. The former was described as perennial (versus annual for the latter) and as having “decided pedicellate” (versus sessile) and longer flowers. Recent data (W. Carr, pers. comm.) indicate that it does bloom in the first year. Furthermore, we have observed that the pedicel character is inconsistent and the flower lengths overlap extensively. Further study of the allopatric populations named P. lundellorum is warranted. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 5, p. 40. | FNA vol. 5, p. 42. |
Parent taxa | Caryophyllaceae > subfam. Paronychioideae > Paronychia | Caryophyllaceae > subfam. Paronychioideae > Paronychia |
Sibling taxa | ||
Synonyms | P. pulvinata var. longiaristata | P. lundellorum, P. setacea var. longibracteata |
Name authority | A. Gray: Proc. Acad. Nat. Sci. Philadelphia 15: 58. (1864) | Torrey & A. Gray: Fl. N. Amer. 1: 170. (1838) |
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