Flora of North America species comparison

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Tragia jonesii

Jones' noseburn
Habit Subshrubs, 4–5 dm.
Stems

decumbent, trailing, or erect, green to gray-green, apex flexuous.
Leaves

petiole 3–10(–15) mm;

blade ovate to triangular-ovate, 0.9–2(–3) × 0.5–1.5(–2) cm, base deeply cordate, margins serrate, apex acute.
Inflorescences

terminal (often appearing leaf-opposed), glands stipitate, prominent throughout, staminate flowers 10–30 per raceme;

staminate bracts 0.8–1 mm.
Pedicels

staminate 2.2–2.4 mm, persistent base 1.8–2 mm;

pistillate 7–11 mm in fruit.
Staminate flowers

sepals 3–4, green, 0.9–1.1 mm;

stamens 2–3, filaments 0.2–0.3 mm.
Pistillate flowers

sepals ovate, 1.5 mm;

styles connate 1/3–1/2 length;

stigmas undulate to subpapillate.
Capsules

5 mm wide.
Seeds

mottled brown-purple, 2.5–3 mm.

Tragia jonesii
Phenology Flowering spring–summer; fruiting summer–fall.
Habitat Sonoran desert scrub.
Elevation 10-–900 m. (0-–3000 ft.)
Distribution
from FNA
AZ; Mexico (Baja California Sur, Sonora)
Discussion

In the flora area, Tragia jonesii is confined to Pima County in southern Arizona. Identified as T. amblyodonta in several floras, it differs from that species by its stipitate glands and twining habit. Tragia jonesii resembles T. glanduligera from southern Texas and eastern Mexico in the presence of stipitate glands, but differs in leaf blade shape and base, the number of teeth on the leaf blade margin (4–9 teeth per side in T. jonesii, 10–15 teeth per side in T. glanduligera), and the longer fruiting pedicel.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 187.
Parent taxa Euphorbiaceae > Tragia
Sibling taxa
T. amblyodonta, T. betonicifolia, T. brevispica, T. cordata, T. glanduligera, T. laciniata, T. leptophylla, T. nepetifolia, T. nigricans, T. ramosa, T. saxicola, T. smallii, T. urens, T. urticifolia
Synonyms T. scandens
Name authority Radcliffe-Smith & Govaerts: Kew Bull. 52: 480. (1997)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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