Smilax illinoensis Mangaly

Smilax illinoensis is intermediate between S. ecirrhata and S. lasioneura.

Herbs. Stems annual, erect, unbranched, 0.5–1 m, herbaceous; prickles absent. Leaves numerous, evenly distributed, larger distally; petiole thin, equaling or longer than blade; tendrils distal, few, short; blade narrowly ovate, pubescent and not glaucous abaxially, base rounded to truncate, margins convex, apex acute to acuminate. Umbels 3–10, axillary to leaves and bracts, 10–50-flowered, semiglobose; proximalmost peduncle longer than distalmost. Flowers: tepals 3.5–4.5 mm; anthers usually shorter than filaments; ovules (1–)2 per locule. Berries blue to black, globose. 2n = 26.

Ont.; Ill., Ind., Iowa, Mich., Minn., Mo., Ohio, Wis.

Flowering May--Jun.

Roadside thickets, woods; 150--600m.

Smilax illinoensis , the Illinois greenbrier, is a North American species of plants found only in the United States and Canada. It is native primarily to the Great Lakes Region with a few populations farther south in Missouri and in the Ohio Valley.

Smilax illinoensis is an erect, unbranched herb up to 100 cm (39 inches) tall, with no prickles. It grows in woods and thickets.

Smilax illinoensis là một loài thực vật có hoa trong họ Smilacaceae. Loài này được Mangaly miêu tả khoa học đầu tiên năm 1968.