Tragia amblyodonta |
Tragia saxicola |
|
---|---|---|
blunt-tooth noseburn, dog-tooth noseburn |
Florida keys noseburn |
|
Habit | Subshrubs, 1.2–5 dm. | Herbs or subshrubs, 1.2–3.5 dm. |
Stems | erect to trailing, gray-green, apex often flexuous. |
erect, green, apex flexuous. |
Leaves | petiole 4–20(–30) mm; blade usually triangular to subhastate, sometimes ovate, 1–4.5 × 0.8–3 cm, base cordate, hastate, or truncate, margins crenate to serrate, apex acute to obtuse. |
petiole 5–13 mm; blade suborbiculate to ovate, 1.2–3 × 1–2.3 cm, base subcordate, margins dentate to serrate, apex acute. |
Inflorescences | terminal or axillary, glands absent, staminate flowers 5–16 per raceme; staminate bracts 0.9–2 mm. |
terminal (often appearing leaf opposed), glands absent, staminate flowers 12–20 per raceme; staminate bracts 0.8–1.2 mm. |
Pedicels | staminate 0.7–1.2 mm, persistent base 0.2–0.8 mm; pistillate 1.5–4 mm in fruit. |
staminate 1.5–1.9 mm, persistent base 0.5–0.7 mm; pistillate 3.2–3.7 mm in fruit. |
Staminate flowers | sepals 3–4, green, 0.9–1.2 mm; stamens 3–4, filaments 0.2–0.7 mm. |
sepals 3–4, green, 1–1.5 mm; stamens 3–4, filaments 0.4–0.6 mm. |
Pistillate flowers | sepals lanceolate, 1–2.5 mm; styles connate to 1/3 length, short-exserted; stigmas undulate to subpapillate. |
sepals lanceolate, 1.5–3 mm; styles connate 1/4–1/3 length; stigmas undulate. |
Capsules | 7–8 mm wide. |
6–7 mm wide. |
Seeds | brown with tan mottling, 2.5–3.5 mm. |
dark brown with light brown streaks, 2.4–3 mm. |
2n | = 110. |
|
Tragia amblyodonta |
Tragia saxicola |
|
Phenology | Flowering spring–fall; fruiting summer–late fall. | Flowering late winter–fall; fruiting spring–early winter. |
Habitat | Dry, rocky, exposed slopes in xerophytic scrub. | Dry pinelands and hammocks on limestone substrates. |
Elevation | 10–1400 m. (0–4600 ft.) | 0–10 m. (0–0 ft.) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Coahuila, Durango, Nuevo León, Tamaulipas) |
FL |
Discussion | Tragia amblyodonta is easily distinguished from other members of Tragia by the combination of usually triangular to subhastate leaf blades, gray-green coloration, and painfully stinging hairs. Both stomata diameter and pollen grain size of T. amblyodonta are larger than in any other North American species of Tragia (K. I. Miller and G. L. Webster 1967). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Tragia saxicola occurs in south Florida and the Florida Keys. Although similar to T. smallii in its suborbiculate leaf blades, it differs in having longer petioles and smaller seeds. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 186. | FNA vol. 12, p. 189. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | T. nepetifolia var. amblyodonta | |
Name authority | (Müller Arg.) Pax & K. Hoffmann: in H. G. A. Engler, Pflanzenr. 68[IV,147]: 51. (1919) | Small: Fl. S.E. U.S. 702, 1333. (1903) |
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