Tragia ramosa
Tragia urticifolia
branch noseburn, branch or desert or common noseburn, desert noseburn, desert tragia
nettle-leaf noseburn
erect to trailing, dark green to light green, apex rarely flexuous.
erect, green, apex never flexuous.
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.
petiole 3–15 mm;
blade triangular-lanceolate, 2.7–6.7 × 1–3 cm, base truncate to cordate, margins serrate, apex acute.
terminal (often appearing leaf opposed), glands few, sessile, staminate flowers 2–20 per raceme; staminate bracts 1.5–2 mm.
terminal (appearing leaf opposed), glands absent, staminate flowers 11–40 per raceme, evenly distributed; staminate bracts 1–1.5 mm.
staminate 0.7–2 mm, persistent base 0.4–1.5 mm; pistillate 2–2.5 mm in fruit.
staminate 1.5–2 mm, persistent base 1–1.8 mm, longer than subtending bract; pistillate 3–4 mm in fruit.
sepals 3–4, green, 1–2.2 mm;
stamens 3–6(–10), filaments 0.3–1 mm.
sepals 3, green, 1.2–2.1 mm;
stamens 3, filaments 0.3–0.8 mm.
sepals lanceolate, 0.8–2.5 mm;
styles connate 1/3–1/2 length, long-exserted;
stigmas smooth to undulate.
sepals lanceolate-ovate, 1.3–2.3 mm;
styles connate 1/3 length;
stigmas papillate.
6–8 mm wide.
7–8 mm wide.
dark brown, 2.5–3.5 mm.
dark brown, 3–4 mm.
= 44.
= 44.
Tragia ramosa
Tragia urticifolia
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.)
Plants of Tragia urticifolia are easily distinguished from those of other non-glandular North American members of Tragia by the persistent bases of its staminate pedicels, which are long-extended beyond their subtending bracts. Although similar to T. betonicifolia, T. urticifolia has fewer stems, shorter pistillate sepals, inflorescences with fewer staminate flowers that are not distally clustered, and leaf blades with very light green abaxial surfaces.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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