Paronychia chartacea


Rhodora 38: 418. 1936.

Common names: Paper nailwort papery whitlow-wort
IllustratedEndemicConservation concern
Basionym: Nyachia pulvinata Small Torreya 25: 12. 1925,
Treatment appears in FNA Volume 5. Treatment on page 34. Mentioned on page 31.

Plants annual or short-lived perennial, often densely matted; taproot filiform to slender. Stems prostrate to ascending, dichotomously branched, 5–20 cm, often retrorsely pubescent on 1 side. Leaves: stipules ovate-lanceolate, 1–1.5 mm, apex obtuse to acuminate, fimbriate; blade oblong to triangular-ovate, 1.5–6 × 0.5–1.5 mm, leathery, apex acute to obtuse, glabrous. Cymes terminal, 7–25+-flowered, much-branched and very profusely developed along all branches, 1.5–20 mm wide. Flowers 5-merous, occasionally 3- or 4-merous, obconic to short-campanulate, with gradually expanded hypanthium and calyx widening distally, 0.5–0.8 mm, pubescent proximally with straight to hooked hairs; sepals brown-purple, white to greenish at apex, sometimes proximally, veins absent, ± oblong, 0.5–0.7 mm, leathery to rigid, margins whitish to translucent, 0.1–0.2 mm wide, scarious, apex terminated by crest or mucro, hood broadly rounded, mucro rounded-triangular, ca. 0.1 mm, glabrous; staminodes absent or rudimentary; styles 2(–3), ca. 0.3 mm. Utricles ovoid or ellipsoid to subglobose, 0.4–0.5 mm, smooth, glabrous.


Varieties 2 (2 in the flora).

The occasional occurrence of 3- or 4-merous flowers is unique to Paronychia chartacea among North American species of the genus.

Paronychia chartacea is in the Center for Plant Conservation’s National Collection of Endangered Plants.

The following key is adapted from L. C. Anderson (1991).

Selected References



1 Caudex (stem base) (1-)1.5-3.5(-4.2) mm; leaf blades 0.5-1.5 mm wide; flower clusters 3-20 mm wide; c peninsular Florida Paronychia chartacea var. chartacea
1 Caudex (stem base) (0.4-)0.7-1(-1.5) mm; leaf blades 1.2-3 mm wide; flower clusters 1.5-4 mm wide; Florida panhandle Paronychia chartacea var. minima
... more about "Paronychia chartacea"
Ronald L. Hartman +, John W. Thieret +  and Richard K. Rabeler +
Fernald +
Nyachia pulvinata +
Paper nailwort +  and papery whitlow-wort +
Illustrated +, Endemic +  and Conservation concern +
Anychia +, Anychiastrum +, Gastronychia +, Gibbesia +, Nyachia +, Odontonychia +  and Siphonychia +
Paronychia chartacea +
Paronychia +
species +