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Florida keys noseburn

blunt-tooth noseburn, dog-tooth noseburn

Habit Herbs or subshrubs, 1.2–3.5 dm. Subshrubs, 1.2–5 dm.
Stems

erect, green, apex flexuous.

erect to trailing, gray-green, apex often flexuous.

Leaves

petiole 5–13 mm;

blade suborbiculate to ovate, 1.2–3 × 1–2.3 cm, base subcordate, margins dentate to serrate, apex acute.

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.

Inflorescences

terminal (often appearing leaf opposed), glands absent, staminate flowers 12–20 per raceme;

staminate bracts 0.8–1.2 mm.

terminal or axillary, glands absent, staminate flowers 5–16 per raceme;

staminate bracts 0.9–2 mm.

Pedicels

staminate 1.5–1.9 mm, persistent base 0.5–0.7 mm;

pistillate 3.2–3.7 mm in fruit.

staminate 0.7–1.2 mm, persistent base 0.2–0.8 mm;

pistillate 1.5–4 mm in fruit.

Staminate flowers

sepals 3–4, green, 1–1.5 mm;

stamens 3–4, filaments 0.4–0.6 mm.

sepals 3–4, green, 0.9–1.2 mm;

stamens 3–4, filaments 0.2–0.7 mm.

Pistillate flowers

sepals lanceolate, 1.5–3 mm;

styles connate 1/4–1/3 length;

stigmas undulate.

sepals lanceolate, 1–2.5 mm;

styles connate to 1/3 length, short-exserted;

stigmas undulate to subpapillate.

Capsules

6–7 mm wide.

7–8 mm wide.

Seeds

dark brown with light brown streaks, 2.4–3 mm.

brown with tan mottling, 2.5–3.5 mm.

2n

= 110.

Tragia saxicola

Tragia amblyodonta

Phenology Flowering late winter–fall; fruiting spring–early winter. Flowering spring–fall; fruiting summer–late fall.
Habitat Dry pinelands and hammocks on limestone substrates. Dry, rocky, exposed slopes in xerophytic scrub.
Elevation 0–10 m. (0–0 ft.) 10–1400 m. (0–4600 ft.)
Distribution
from FNA
FL
[BONAP county map]
from FNA
AZ; NM; TX; Mexico (Chihuahua, Coahuila, Durango, Nuevo León, Tamaulipas)
[BONAP county map]
Discussion

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.)

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.)

Source FNA vol. 12, p. 189. FNA vol. 12, p. 186.
Parent taxa Euphorbiaceae > Tragia Euphorbiaceae > Tragia
Sibling taxa
T. amblyodonta, T. betonicifolia, T. brevispica, T. cordata, T. glanduligera, T. jonesii, T. laciniata, T. leptophylla, T. nepetifolia, T. nigricans, T. ramosa, T. smallii, T. urens, T. urticifolia
T. betonicifolia, T. brevispica, T. cordata, T. glanduligera, T. jonesii, T. laciniata, T. leptophylla, T. nepetifolia, T. nigricans, T. ramosa, T. saxicola, T. smallii, T. urens, T. urticifolia
Synonyms T. nepetifolia var. amblyodonta
Name authority Small: Fl. S.E. U.S. 702, 1333. (1903) (Müller Arg.) Pax & K. Hoffmann: in H. G. A. Engler, Pflanzenr. 68[IV,147]: 51. (1919)
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