Tragia urens |
Tragia laciniata |
|
---|---|---|
wavy-leaf noseburn |
sonoita noseburn, Sonoran noseburn |
|
Habit | Herbs or subshrubs, 2–5 dm. | Subshrubs, 2.5–5 dm. |
Stems | erect, green to purple-green, apex never flexuous. |
erect to decumbent, dark 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. |
usually 3-foliolate, sometimes 3-lobed nearly to base; petiole 7–18 mm; leaflets: blade lanceolate, base acute, margins deeply and coarsely serrate, sinuses often extending 1/2+ to midvein, apex acute, central one 2.5–4 × 1–2 cm, lateral ones often with basal lobe. |
Inflorescences | terminal (often appearing leaf opposed), glands absent, staminate flowers 3–45 per raceme; staminate bracts 1–1.5 mm. |
terminal (often appearing leaf opposed), glands absent, staminate flowers 10–20 per raceme; staminate bracts 0.5–1.5 mm. |
Pedicels | staminate 1.3–2 mm, persistent base 0.3–0.6 mm; pistillate 3.5–4 mm in fruit. |
staminate 0.8–1.6 mm, persistent base 0.3–0.7 mm; pistillate 2.5–3 mm in fruit. |
Staminate flowers | sepals 4–5, green, 1–1.5 mm; stamens 2, filaments 0.2–0.4 mm. |
sepals 3–4, green, 1–1.4 mm; stamens 3, filaments 3.5–4 mm. |
Pistillate flowers | sepals linear, 1–1.8 mm; styles connate 1/4–1/3 length; stigmas undulate. |
sepals lanceolate, 2–3 mm; styles connate 1/4–1/2 length; stigmas undulate to subpapillate. |
Capsules | 7–8 mm wide. |
6–7 mm wide. |
Seeds | brown with tan streaks, 3–4 mm. |
dark brown, 3–3.2 mm. |
2n | = 44. |
|
Tragia urens |
Tragia laciniata |
|
Phenology | Flowering late spring; fruiting summer–fall. | Flowering summer–fall; fruiting late summer–fall. |
Habitat | Dry, sandy pinelands, oak barrens, disturbed fields. | Oak woodlands, ravines, stream banks. |
Elevation | 0–300 m. (0–1000 ft.) | 1200–1700 m. (3900–5600 ft.) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX; VA
|
AZ; Mexico (Chihuahua, Sonora) |
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.) |
Tragia laciniata is the only Tragia in the flora area with compound leaves. Some plants from Sonora, Mexico, are intermediate between T. laciniata and T. nepetifolia var. dissecta. In the flora area, T. laciniata is known from southern Arizona. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 190. | FNA vol. 12, p. 188. |
Parent taxa | Euphorbiaceae > Tragia | Euphorbiaceae > Tragia |
Sibling taxa | ||
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 | T. urticifolia var. laciniata |
Name authority | Linnaeus: Sp. Pl. ed. 2, 2: 1391. (1763) | (Torrey) Müller Arg.: Linnaea 34: 182. (1865) |
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