Tragia urens |
Tragia jonesii |
|
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wavy-leaf noseburn |
Jones' noseburn |
|
Habit | Herbs or subshrubs, 2–5 dm. | Subshrubs, 4–5 dm. |
Stems | erect, green to purple-green, apex never flexuous. |
decumbent, trailing, or erect, green to gray-green, apex 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. |
petiole 3–10(–15) mm; blade ovate to triangular-ovate, 0.9–2(–3) × 0.5–1.5(–2) cm, base deeply cordate, margins serrate, apex acute. |
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 stipitate, prominent throughout, staminate flowers 10–30 per raceme; staminate bracts 0.8–1 mm. |
Pedicels | staminate 1.3–2 mm, persistent base 0.3–0.6 mm; pistillate 3.5–4 mm in fruit. |
staminate 2.2–2.4 mm, persistent base 1.8–2 mm; pistillate 7–11 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, 0.9–1.1 mm; stamens 2–3, filaments 0.2–0.3 mm. |
Pistillate flowers | sepals linear, 1–1.8 mm; styles connate 1/4–1/3 length; stigmas undulate. |
sepals ovate, 1.5 mm; styles connate 1/3–1/2 length; stigmas undulate to subpapillate. |
Capsules | 7–8 mm wide. |
5 mm wide. |
Seeds | brown with tan streaks, 3–4 mm. |
mottled brown-purple, 2.5–3 mm. |
2n | = 44. |
|
Tragia urens |
Tragia jonesii |
|
Phenology | Flowering late spring; fruiting summer–fall. | Flowering spring–summer; fruiting summer–fall. |
Habitat | Dry, sandy pinelands, oak barrens, disturbed fields. | Sonoran desert scrub. |
Elevation | 0–300 m. (0–1000 ft.) | 10-–900 m. (0-–3000 ft.) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX; VA
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AZ; Mexico (Baja California Sur, 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.) |
In the flora area, Tragia jonesii is confined to Pima County in southern Arizona. Identified as T. amblyodonta in several floras, it differs from that species by its stipitate glands and twining habit. Tragia jonesii resembles T. glanduligera from southern Texas and eastern Mexico in the presence of stipitate glands, but differs in leaf blade shape and base, the number of teeth on the leaf blade margin (4–9 teeth per side in T. jonesii, 10–15 teeth per side in T. glanduligera), and the longer fruiting pedicel. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 190. | FNA vol. 12, p. 187. |
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. scandens |
Name authority | Linnaeus: Sp. Pl. ed. 2, 2: 1391. (1763) | Radcliffe-Smith & Govaerts: Kew Bull. 52: 480. (1997) |
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