Smilax rotundifolia

Linnaeus
Sp. Pl. 2: 1030. 1753.
Common names: Common greenbrier or catbrier bullbrier horsebrier
IllustratedEndemic
Synonyms: Smilax caduca Linnaeus Smilax quadrangularis Muhlenberg ex Willdenow Smilax rotundifolia var. crenulata Small & A. Heller Smilax rotundifolia var. quadrangularis (Muhlenberg ex Willdenow) Alph. Wood
Treatment appears in FNA Volume 26. Treatment on page 476. Mentioned on page 470, 475, 477.

Vines; rhizomes linear. Stems perennial, climbing, branching, terete to quadrangular, 5–6+ m × 6 mm, woody, glabrous; prickles green with dark tips, stout, to 12 mm. Leaves deciduous to evergreen, ± evenly disposed; petiole 0.5–1.5 cm; tendrils numerous; blade variable, bright green, drying to pale to brownish green, usually ovate to broadly ovate, with 3 (or 5) ± prominent veins, 4–17 × 4–16 cm, lustrous, not glaucous, glabrous abaxially, base cordate to rounded with acute insertion at petiole, margins entire, apex abruptly pointed. Umbels numerous, axillary to leaves, 5–12(–20)-flowered, open to dense, hemispherical to spherical; peduncle to 1.5 cm, longer or shorter than petiole of subtending leaf. Flowers: perianth pale yellowish green to bronze; tepals 3–4 mm; anthers shorter than to ± equaling filaments; ovule 1 per locule; pedicel 0.2–1.5 cm. Berries blue-black to black, globose, 5–8 mm, glaucous. 2n = 32.


Phenology: Flowering Apr–Jun.
Habitat: Dry to moist, sometimes riparian woods, borders, hedgerows, thickets
Elevation: 0–200 m

Distribution

V26 996-distribution-map.jpg

N.S., Ont., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Kans., Ky., La., Maine, Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Va., W.Va.

Discussion

Normally, the peduncle of Smilax rotundifolia is about the same length as the petiole of the subtending leaf. In exceptional cases, the peduncle may be considerably longer, thereby making this widely distributed species difficult to distinguish from S. bona-nox and S. tamnoides. It lacks the marginal cartilaginous band found on the leaves of the former species and the hispid prickles of the stem of the latter. Specimens of S. tamnoides lacking prickles may be distinguished by their more strongly ridged stems.

Selected References

None.

Lower Taxa

None.

... more about "Smilax rotundifolia"
Walter C. Holmes +
Linnaeus +
Common greenbrier or catbrier +, bullbrier +  and horsebrier +
N.S. +, Ont. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
0–200 m +
Dry to moist, sometimes riparian woods, borders, hedgerows, thickets +
Flowering Apr–Jun. +
W2 +, W1 +, Illustrated +  and Endemic +
Smilax caduca +, Smilax quadrangularis +, Smilax rotundifolia var. crenulata +  and Smilax rotundifolia var. quadrangularis +
Smilax rotundifolia +
species +