Paronychia fastigiata (Raf.) Fern.

The varieties here recognized are sympatric over at least portions of their ranges. A detailed study on infraspecific variation within Paronychia fastigiata is warranted.

Plants annual; taproot filiform to slender. Stems erect, usually much-branched, 4-30 cm, retrorsely to spreading-pubescent mostly on 1 side. Leaves: 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. Cymes terminal, 25-70+-flowered, branched, loose to compact, forming clusters 3-10 mm wide. Flowers 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. Utricles obovoid to obconic, 0.7-1 mm, minutely papillate. 2n = 32, 36.

Anychia fastigiata Rafinesque, Atlantic J. 1: 16. 1832

Paronychia fastigiata, common names hairy forked chickweed, hairy forked nailwort, and forked chickweed, is an annual plant native to North America.

Paronychia fastigiata là loài thực vật có hoa thuộc họ Cẩm chướng. Loài này được (Raf.) Fernald mô tả khoa học đầu tiên năm 1936.