Paronychia drummondii Torr. & Gray

Chaudhri described two subspecies of Paronychia drummondii based on differences in leaf pubescence, flower size, and style length. We follow B. L. Turner (1983b), who noted that many specimens demonstrate intermediate characteristics, suggesting that taxonomic recognition not be given to the extremes.

Plants annual or biennial; taproot filiform to slender. Stems sprawl-ing t2o erect, nearly simple to much-branched especially distally, 7-35 cm, retrorsely pubescent on 1 side or throughout. Leaves: stipules lanceolate to ovate, 5-10 mm, apex acuminate, entire; blade linear-oblong to oblanceolate, 5-30 × 1-7 mm, leathery, apex acute to cuspidate, moderately antrorsely pubescent. Cymes terminal, 25+-flowered, much-branched but congested, clusters 5-20 mm wide. Flowers 5-merous, ± short-campanulate, with prominently enlarged hypanthium and calyx flaring distally, (1.5-)2-2.3 mm, pubescent proximally with short, hooked hairs; sepals greenish to brownish or red-brown, white distally, veins absent, oblong to obovate, 1-1.5 mm, leathery to rigid, margins white, 0.2-0.3 mm wide, papery, apex terminating in divergent awn, hood broadly rounded, awn white, stout-conic, 0.5-0.6 mm, glabrous; staminodes filiform, ± 0.3 mm; style 1, cleft in distal 1/ 5, 0.3-0.6 mm. Utricles ellipsoid to subglobose, 0.5-0.8 mm, minutely papillate distally.

La., Okla., Tex.

Flowering spring-fall.

Sandy woodlands, clearings, roadsides; 0-100m.

Paronychia drummondii subsp. parviflora Chaudhri

Paronychia drummondii, commonly called Drummond's nailwort, is a species of flowering plant in the family Caryophyllaceae. It is native to the United States where it is restricted to the South Central region in the states of Louisiana, Oklahoma, and Texas. Its natural habitat is in sandy woodlands and openings.

Paronychia drummondii is an erect annual or biennial. Its leaves are oblong to linear-lanceolate. A key characteristic is the abundance of uniform, hooked hairs at the base of the calyx. Flowers are produced from late spring to fall.

Paronychia drummondii là loài thực vật có hoa thuộc họ Cẩm chướng. Loài này được Torr. & A. Gray mô tả khoa học đầu tiên năm 1838.