Tragia nepetifolia
Tragia ramosa
catnip noseburn
branch noseburn, branch or desert or common noseburn, desert noseburn, desert tragia
erect to trailing, green to reddish green, apex never flexuous.
erect to trailing, dark green to light green, apex rarely flexuous.
petiole 3–25(–41) mm;
blade triangular to ovate [linear], proximal broadly ovate to sometimes suborbiculate, 1.8–5 × 0.9–3.6 cm, often red-green, base truncate to cordate, margins coarsely dentate to coarsely serrate, 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.
terminal (often appearing leaf opposed), glands sessile or absent, staminate flowers 8–40 per raceme, distally clustered [evenly distributed]; staminate bracts 1.3–1.6 mm.
terminal (often appearing leaf opposed), glands few, sessile, staminate flowers 2–20 per raceme; staminate bracts 1.5–2 mm.
staminate 1.4–1.7 mm, persistent base 0.5–0.7 mm; pistillate 2.9–3.3 mm in fruit.
staminate 0.7–2 mm, persistent base 0.4–1.5 mm; pistillate 2–2.5 mm in fruit.
sepals 3–4, reddish green, 1–2 mm;
stamens 3–4, filaments 0.3–0.6 mm.
sepals 3–4, green, 1–2.2 mm;
stamens 3–6(–10), filaments 0.3–1 mm.
sepals lanceolate [ovate], 1.4–2.3 mm;
styles connate 1/4–1/3 length;
stigmas papillate.
sepals lanceolate, 0.8–2.5 mm;
styles connate 1/3–1/2 length, long-exserted;
stigmas smooth to undulate.
6–8 mm wide.
6–8 mm wide.
brownish black, 3–4 mm.
dark brown, 2.5–3.5 mm.
= 44.
Tragia nepetifolia
Tragia ramosa
Tragia nepetifolia is typically found at high elevations in Mexico and the southwestern United States. Since it was described more than 200 years ago, many collections of Tragia in Mexico and the United States have been identified mistakenly as this species.
Tragia nepetifolia includes four varieties in Mexico, but none match plants occurring in the United States. These most closely resemble var. dissecta Müller Arg. of western Mexico, sharing inflorescences with distally clustered staminate flowers and a tendency toward reddish coloration, but differing in that their leaf blades are not as deeply toothed.
(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.)
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