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American nailwort

Habit Plants annual or biennial; taproot slender.
Stems

erect or ascending to prostrate, branched, 5–60 cm, often retrorsely pubescent on 1 side.

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.

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.

Cymes

terminal, 9–25-flowered, ± compact, forming spheroid glomerules 2–6 mm wide.

Utricles

ovoid to ellipsoid, 0.6–0.8 mm, smooth, glabrous.

Paronychia americana

Phenology Flowering year round.
Habitat Dunes, pine/oak woodland, fields, clearings, roadsides
Elevation 0-300 m (0-1000 ft)
Distribution
from FNA
AL; FL; GA; SC
[WildflowerSearch map]
[BONAP county map]
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.)

Source FNA vol. 5, p. 33.
Parent taxa Caryophyllaceae > subfam. Paronychioideae > Paronychia
Sibling taxa
P. ahartii, P. argyrocoma, P. baldwinii, P. canadensis, P. chartacea, P. congesta, P. depressa, P. drummondii, P. echinulata, P. erecta, P. fastigiata, P. franciscana, P. herniarioides, P. jamesii, P. jonesii, P. lindheimeri, P. maccartii, P. monticola, P. patula, P. pulvinata, P. rugelii, P. sessiliflora, P. setacea, P. virginica, P. wilkinsonii
Synonyms Herniaria americana, P. americana subsp. pauciflora, Siphonychia americana, Siphonychia pauciflora
Name authority (Nuttall) Fenzl ex Walpers: Repert. Bot. Syst. 1: 262. (1842)
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