Flora of North America species comparison

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Tragia urens

wavy-leaf noseburn
Habit Herbs or subshrubs, 2–5 dm.
Stems

erect, green to purple-green, apex never flexuous.
Leaves

petiole 0–2 mm;

blade usually oblanceolate to linear, sometime elliptic, 2–8(–10) × 0.2–1.4 cm, base acute, margins entire or irregularly and shallowly sinuate, apex acute.
Inflorescences

terminal (often appearing leaf opposed), glands absent, staminate flowers 3–45 per raceme; staminate bracts 1–1.5 mm.
Pedicels

staminate 1.3–2 mm, persistent base 0.3–0.6 mm; pistillate 3.5–4 mm in fruit.
Staminate flowers

sepals 4–5, green, 1–1.5 mm;

stamens 2, filaments 0.2–0.4 mm.
Pistillate flowers

sepals linear, 1–1.8 mm;

styles connate 1/4–1/3 length;

stigmas undulate.
Capsules

7–8 mm wide.
Seeds

brown with tan streaks, 3–4 mm.
2n

= 44.

Tragia urens
Phenology Flowering late spring; fruiting summer–fall.
Habitat Dry, sandy pinelands, oak barrens, disturbed fields.
Elevation 0–300 m. (0–1000 ft.)
Distribution
from FNA
AL; FL; GA; LA; MS; NC; SC; TX; VA
[WildflowerSearch map]
[BONAP county map]
Discussion

Tragia urens is widespread from the Gulf Coast to the mid-Atlantic states and displays considerable foliar variation. Leaf blades that usually are oblanceolate to linear with entire to sinuate margins, two stamens, and sparse, stinging hairs are diagnostic traits for this species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 190.
Parent taxa Euphorbiaceae > Tragia
Sibling taxa
T. amblyodonta, T. betonicifolia, T. brevispica, T. cordata, T. glanduligera, T. jonesii, T. laciniata, T. leptophylla, T. nepetifolia, T. nigricans, T. ramosa, T. saxicola, T. smallii, T. urticifolia
Synonyms Leptobotrys discolor, T. discolor, T. discolor var. linearis, T. discolor var. subovalis, T. linearifolia, T. urens var. innocua, T. urens var. lanceolata, T. urens var. linearis, T. urens var. subovalis
Name authority Linnaeus: Sp. Pl. ed. 2, 2: 1391. (1763)
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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