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wavy-leaf noseburn

Jones' noseburn

Habit Herbs or subshrubs, 2–5 dm. Subshrubs, 4–5 dm.
Stems

erect, green to purple-green, apex never flexuous.

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

Leaves

petiole 0–2 mm;

blade usually oblanceolate to linear, sometime elliptic, 2–8(–10) × 0.2–1.4 cm, base acute, margins entire or irregularly and shallowly sinuate, apex acute.

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 absent, staminate flowers 3–45 per raceme; staminate bracts 1–1.5 mm.

terminal (often appearing leaf-opposed), glands stipitate, prominent throughout, staminate flowers 10–30 per raceme; staminate bracts 0.8–1 mm.

Pedicels

staminate 1.3–2 mm, persistent base 0.3–0.6 mm; pistillate 3.5–4 mm in fruit.

staminate 2.2–2.4 mm, persistent base 1.8–2 mm; pistillate 7–11 mm in fruit.

Staminate flowers

sepals 4–5, green, 1–1.5 mm;

stamens 2, filaments 0.2–0.4 mm.

sepals 3–4, green, 0.9–1.1 mm;

stamens 2–3, filaments 0.2–0.3 mm.

Pistillate flowers

sepals linear, 1–1.8 mm;

styles connate 1/4–1/3 length;

stigmas undulate.

sepals ovate, 1.5 mm;

styles connate 1/3–1/2 length;

stigmas undulate to subpapillate.

Capsules

7–8 mm wide.

5 mm wide.

Seeds

brown with tan streaks, 3–4 mm.

mottled brown-purple, 2.5–3 mm.

2n

= 44.

Tragia urens

Tragia jonesii

Phenology Flowering late spring; fruiting summer–fall. Flowering spring–summer; fruiting summer–fall.
Habitat Dry, sandy pinelands, oak barrens, disturbed fields. Sonoran desert scrub.
Elevation 0–300 m. (0–1000 ft.) 10-–900 m. (0-–3000 ft.)
Distribution
from FNA
AL; FL; GA; LA; MS; NC; SC; TX; VA
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; Mexico (Baja California Sur, Sonora)
Discussion

Tragia urens is widespread from the Gulf Coast to the mid-Atlantic states and displays considerable foliar variation. Leaf blades that usually are oblanceolate to linear with entire to sinuate margins, two stamens, and sparse, stinging hairs are diagnostic traits for this species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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. 190. FNA vol. 12, p. 187.
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. saxicola, T. smallii, T. urticifolia
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 Leptobotrys discolor, T. discolor, T. discolor var. linearis, T. discolor var. subovalis, T. linearifolia, T. urens var. innocua, T. urens var. lanceolata, T. urens var. linearis, T. urens var. subovalis T. scandens
Name authority Linnaeus: Sp. Pl. ed. 2, 2: 1391. (1763) Radcliffe-Smith & Govaerts: Kew Bull. 52: 480. (1997)
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