Paronychia rugelii |
Paronychia fastigiata |
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Rugel's nailwort, sand squares |
clusterstem nailwort, fork-chickweed, hairy fork nailwort, hairy fork whitlow-wort |
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Habit | Plants annual; taproot filiform to slender. | Plants annual; taproot filiform to slender. | ||||||||
Stems | erect, dichotomously branched, 5–50 cm, retrorsely to spreading- pubescent throughout. |
erect, usually much-branched, 4–30 cm, retrorsely to spreading-pubescent mostly on 1 side. |
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Leaves | stipules ovate-lanceolate, 2–6 mm, apex acuminate, entire; blade linear to linear-oblanceolate or linear-oblong, 3–25 × 1–2.3 mm, herbaceous, apex ± acute, moderately antrorsely puberulent. |
stipules subulate to lanceolate, 0.5–4.5 mm, apex acuminate, sometimes fimbriate; blade usually dotted or blotched, oblanceolate to elliptic or obovate, 2–25 × 0.5–7(–10) mm, herbaceous to leathery, apex subobtuse to acute or cuspidate, glabrous or occasionally with very few scattered trichomes along midrib. |
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Flowers | 5-merous, cylindric to narrowly lanceolate, with enlarged hypanthium and calyx cylindric to tapering distally, 2.3–3.5 mm, pubescent mostly proximal with hooked or usually straight hairs, sometimes with scattered straight hairs distally; sepals flecked or solid red-brown, white distally, midrib obscure, linear-lanceolate, 1.5–2 mm, papery, margins white, 0.1–0.2 mm wide, papery, apex terminated by mucro, hood obscure, narrowly rounded, mucro short-conic, ca. 0.1 mm, glabrous; staminodes filiform, widening proximally, 0.5–0.6 mm; style 1, cleft in distal 1/10. |
5-merous, short-cylindric, with enlarged hypanthium and calyx ± cylindric, 1.1–1.6 mm, glabrous or with few scattered hairs; sepals greenish to brownish, veins absent, linear-oblong, 1–1.2 mm, leathery to rigid, margins white to translucent, 0.05–0.1 mm wide, scarious, apex terminated by mucro, hood narrowly rounded, mucro short-conic, 0.05–0.3 mm, ± minutely scabrous; staminodes absent; styles 2, 0.07–0.6(–0.7) mm. |
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Cymes | terminal and lateral, 15–50+-flowered, often forming large, congested clusters 5–30 mm wide. |
terminal, 25–70+-flowered, branched, loose to compact, forming clusters 3–10 mm wide. |
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Utricles | broadly ellipsoid to ± globose, 0.5–0.7 mm, smooth, glabrous. |
obovoid to obconic, 0.7–1 mm, minutely papillate. |
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2n | = 32, 36. |
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Paronychia rugelii |
Paronychia fastigiata |
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Phenology | Flowering late spring–fall. | |||||||||
Habitat | Woodlands, fields, clearings, roadsides, waste places | |||||||||
Elevation | 0-200 m (0-700 ft) | |||||||||
Distribution |
FL; GA
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AL; AR; CT; DC; DE; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; WI; WV; ON; QC
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Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 3 (3 in the flora). The varieties here recognized are sympatric over at least portions of their ranges. A detailed study on infraspecific variation within Paronychia fastigiata is warranted. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 41. | FNA vol. 5, p. 37. | ||||||||
Parent taxa | Caryophyllaceae > subfam. Paronychioideae > Paronychia | Caryophyllaceae > subfam. Paronychioideae > Paronychia | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Siphonychia rugelii, Gibbesia rugelii, Odontonychia interior, P. rugelii var. interior, Siphonychia interior | Anychia fastigiata | ||||||||
Name authority | (Chapman) Shuttleworth ex Chapman: Fl. South. U.S. ed. 3, 397. (1897) | (Rafinesque) Fernald: Rhodora 38: 421. (1936) | ||||||||
Web links |