Tragia cordata |
Tragia urens |
|
---|---|---|
heart-leaf noseburn |
wavy-leaf noseburn |
|
Habit | Herbs or subshrubs, 2–5 dm. | |
Stems | usually decumbent or twining, rarely erect, gray-green to light green, apex flexuous. |
erect, green to purple-green, apex never flexuous. |
Leaves | petiole 15–85 mm; blade ovate to broadly cordate, 4.5–10(–13) × 3.5–10 cm, base cordate, margins serrate, apex acuminate. |
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 20–60 per raceme; staminate bracts 1.5–2 mm. |
terminal (often appearing leaf opposed), glands absent, staminate flowers 3–45 per raceme; staminate bracts 1–1.5 mm. |
Pedicels | staminate 1.5–2.2 mm, persistent base 0.7–1 mm; pistillate 2.5–3 mm in fruit. |
staminate 1.3–2 mm, persistent base 0.3–0.6 mm; pistillate 3.5–4 mm in fruit. |
Staminate flowers | sepals 3, green, 0.7–1 mm; stamens 3, filaments 0.2–0.5 mm. |
sepals 4–5, green, 1–1.5 mm; stamens 2, filaments 0.2–0.4 mm. |
Pistillate flowers | sepals elliptic to ovate, 1.5–2 mm; styles connate 1/4–1/3 length; stigmas papillate. |
sepals linear, 1–1.8 mm; styles connate 1/4–1/3 length; stigmas undulate. |
Capsules | 11–13 mm wide. |
7–8 mm wide. |
Seeds | dark brown, 4.3–5.3 mm. |
brown with tan streaks, 3–4 mm. |
Vines | , 15–20 dm. |
|
2n | = 44. |
|
Tragia cordata |
Tragia urens |
|
Phenology | Flowering spring–fall; fruiting summer–late fall. | Flowering late spring; fruiting summer–fall. |
Habitat | Rich deciduous forests, riverbanks, rocky thickets. | Dry, sandy pinelands, oak barrens, disturbed fields. |
Elevation | 50–500 m. (200–1600 ft.) | 0–300 m. (0–1000 ft.) |
Distribution |
AL; AR; FL; GA; IL; IN; KY; LA; MO; MS; OK; TN; TX
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AL; FL; GA; LA; MS; NC; SC; TX; VA
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Discussion | Both the morphology and ecology of Tragia cordata make it unique among American members of Tragia. The relatively large, heart-shaped leaves separate it from the other Tragia in the flora area; it is the only twining species of Tragia found in the deciduous forest of the Midwest. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. 187. | FNA vol. 12, p. 190. |
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 | |
Name authority | Michaux: Fl. Bor.-Amer. 2: 176. (1803) | Linnaeus: Sp. Pl. ed. 2, 2: 1391. (1763) |
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