Tragia urens |
Tragia ramosa |
|
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wavy-leaf noseburn |
branch noseburn, branch or desert or common noseburn, desert noseburn, desert tragia |
|
Habit | Herbs or subshrubs, 2–5 dm. | Subshrubs, 1.2–5 dm. |
Stems | erect, green to purple-green, apex never flexuous. |
erect to trailing, dark green to light green, apex rarely 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 2–20 mm; blade linear-lanceolate to narrowly ovate, 1–4 × 0.5–2 cm, base truncate to weakly 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 few, sessile, staminate flowers 2–20 per raceme; staminate bracts 1.5–2 mm. |
Pedicels | staminate 1.3–2 mm, persistent base 0.3–0.6 mm; pistillate 3.5–4 mm in fruit. |
staminate 0.7–2 mm, persistent base 0.4–1.5 mm; pistillate 2–2.5 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, 1–2.2 mm; stamens 3–6(–10), filaments 0.3–1 mm. |
Pistillate flowers | sepals linear, 1–1.8 mm; styles connate 1/4–1/3 length; stigmas undulate. |
sepals lanceolate, 0.8–2.5 mm; styles connate 1/3–1/2 length, long-exserted; stigmas smooth to undulate. |
Capsules | 7–8 mm wide. |
6–8 mm wide. |
Seeds | brown with tan streaks, 3–4 mm. |
dark brown, 2.5–3.5 mm. |
2n | = 44. |
= 44. |
Tragia urens |
Tragia ramosa |
|
Phenology | Flowering late spring; fruiting summer–fall. | Flowering spring–fall; fruiting late spring–fall. |
Habitat | Dry, sandy pinelands, oak barrens, disturbed fields. | Mesquite, desert scrub, pine-juniper, oak woodlands. |
Elevation | 0–300 m. (0–1000 ft.) | 200–2800 m. (700–9200 ft.) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX; VA
|
AR; AZ; CA; CO; KS; MO; NE; NM; NV; TX; UT; Mexico (Baja California, Chihuahua, Coahuila, Nuevo León, Sonora, Tamaulipas)
|
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 ramosa is a variable species showing much environmental plasticity. Collections from the western United States and western Mexico have much broader leaves than those from Texas and Nuevo León, and were previously referred to as T. stylaris. Smooth stigmatic surfaces, three to six (rarely to ten) stamens, and narrow apical leaves are characters consistent with T. ramosa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 190. | FNA vol. 12, p. 189. |
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. angustifolia, T. nepetifolia var. angustifolia, T. nepetifolia var. ramosa, T. ramosa var. latifolia, T. stylaris, T. stylaris var. angustifolia, T. stylaris var. latifolia |
Name authority | Linnaeus: Sp. Pl. ed. 2, 2: 1391. (1763) | Torrey: Ann. Lyceum Nat. Hist. New York 2: 245. (1827) |
Web links |