Flora of North America species comparison

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Gossypianthus lanuginosus

woolly cottonflower
Habit Plants 1–7 dm diam.
Stems

prostrate to decumbent, 0.4–1 mm diam., sparsely pilose to strongly woolly-villous with whitish, straight to wavy-crinkled hairs.
Leaves

basal and cauline;

basal leaves with petiole 0.5–2 cm, blade linear or linear-oblanceolate to spatulate, 1.6–9.7 × 0.2–1(–1.7) cm;

cauline leaves with winged petiole 1–5 mm, blade ovate, elliptic-ovate elliptic, oblong-elliptic, oblong, or oblong-ovate, (0.1–)0.5–1.8(–3.3) × (0.1–)0.2–0.7 (–1.3) cm, glabrous or sparsely to densely pilose to strigose.
Flowers

sessile;

tepals green, oblong-lanceolate, outer tepals 2.5–4 mm, inner tepals 2.5–3.6 mm, chartaceous, apex acuminate, woolly-villous on exposed surfaces.
Seeds

0.8–1.2 × 0.6–0.9 mm.
Glomerules

white, globose to cylindric, 1–10 × 5–8 mm.
Utricles

included within tepals, 1.4–2 mm.

Gossypianthus lanuginosus
Distribution
from FNA
AR; NM; OK; TX; Mexico; West Indies
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[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Basal leaf blades oblong-oblanceolate, oblanceolate, or spatulate; cauline leaf blades ovate to oblong-ovate or obovate, pilose to sericeous abaxially, pilose to glabrate adaxially
var. lanuginos
1. Basal leaf blades linear to linear-oblanceolate; cauline leaf blades oblong-elliptic to oblong, glabrous throughout or with scattered, marginal hairs near base
var. tenuiflor
Source FNA vol. 4, p. 438.
Parent taxa Amaranthaceae > Gossypianthus
Subordinate taxa
G. lanuginosus var. lanuginos, G. lanuginosus var. tenuiflor
Synonyms Paronychia lanuginosa, Guilleminea lanuginosa
Name authority (Poiret) Moquin-Tandon: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 13(2): 337. (1849)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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