Paronychia americana |
Paronychia franciscana |
|
---|---|---|
American nailwort |
California whitlow wort, San Francisco nailwort, San Francisco whitlow wort |
|
Habit | Plants annual or biennial; taproot slender. | Plants perennial, mat-forming; caudex branched, woody. |
Stems | erect or ascending to prostrate, branched, 5–60 cm, often retrorsely pubescent on 1 side. |
prostrate, usually much-branched throughout, 5–50 cm, pubescent. |
Leaves | stipules ovate-lanceolate, 1.5–7 mm, apex acuminate, fimbriate; blade spatulate to oblanceolate or linear-oblanceolate, 3–20 × 1–4 mm, herbaceous, apex acute to obtuse or rounded, glabrous to scaberulous. |
stipules ovate-lanceolate, 3–6 mm, apex narrowly acute to long-acuminate, entire; blade elliptic to oblanceolate, 5–10 × 1.5–2.5 mm, ± fleshy, apex spinulous, entire, ± moderately antrorsely appressed-pubescent. |
Flowers | 5-merous, ± short-cylindric, with slightly enlarged hypanthium and calyx widening somewhat distally, 1–1.8 mm, sparsely to moderately pubescent proximally with hooked to straight hairs; sepals red-brown (sometimes finely striped or mottled), white distally, midrib obscure, obovate, 0.4–0.8 mm, leathery to rigid, margins white, 0.03–0.1 mm wide, thinly herbaceous, apex broadly rounded, hood broadly rounded, awn or mucro usually absent or minute; staminodes narrowly triangular, 0.3–0.4 mm; style 1, cleft in distal 1/6, 0.6–0.8 mm. |
5-merous, short-cylindric, with enlarged hypanthium and calyx cylindric to slightly tapering distally, 1.9–2.4 mm, glabrous, sepals puberulent distally; sepals greenish, becoming reddish brown, midrib and lateral pair of veins often apparent, oblong to ovate, 1.2–1.3 mm, herbaceous, margins translucent, ca. 0.1 mm wide, scarious, apex terminated by awn, hood broadly rounded, awn erect, 0.5–0.7 mm, conic in proximal 1/6 with whitish, smooth spine; staminodes absent; styles 2, 0.2–0.3 mm. |
Cymes | terminal, 9–25-flowered, ± compact, forming spheroid glomerules 2–6 mm wide. |
axillary, inconspicuous, 2–6-flowered, tightly congested. |
Utricles | ovoid to ellipsoid, 0.6–0.8 mm, smooth, glabrous. |
± globose to 4-angled, 1.2–1.3 mm, papillate distally. |
Paronychia americana |
Paronychia franciscana |
|
Phenology | Flowering year round. | Flowering spring. |
Habitat | Dunes, pine/oak woodland, fields, clearings, roadsides | Grassy hills |
Elevation | 0-300 m (0-1000 ft) | 20-300 m (100-1000 ft) |
Distribution |
AL; FL; GA; SC
|
CA; South America (Chile) [Introduced in North America]
|
Discussion | Plants of Paronychia americana with fewer flowers in lax cymes from Florida and Georgia were named subsp. pauciflora, a distinction that we do not feel is worth recognition. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Although Paronychia franciscana was described from California, where it has been known from the San Francisco area since 1887, the species is native in Chile. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 33. | FNA vol. 5, p. 38. |
Parent taxa | Caryophyllaceae > subfam. Paronychioideae > Paronychia | Caryophyllaceae > subfam. Paronychioideae > Paronychia |
Sibling taxa | ||
Synonyms | Herniaria americana, P. americana subsp. pauciflora, Siphonychia americana, Siphonychia pauciflora | |
Name authority | (Nuttall) Fenzl ex Walpers: Repert. Bot. Syst. 1: 262. (1842) | Eastwood: Bull. Torrey Bot. Club 28: 288. (1901) |
Web links |