subterete

Racemes subterete; articulations of rachis transverse; callus short, truncate.

leaf blade flattened [to subterete], margin entire, slightly to gradually [to strongly] revolute.

Young branches pale green, turning purplish or brownish, subterete, glabrous.

twigs purple-red, subterete, slender, finely striate.

Stems usually 4-sided, narrowly winged when young, slightly setose and puberulous on wings otherwise glabrous, often subterete when mature.

Branchlets subterete or slightly compressed, glabrous or nearly so.

Cladodes borne in clusters, rarely solitary, green, flat, 3-angled, or subterete.

Herbs perennial. Stems densely tufted, diffuse, purplish, subterete, 10--30 cm tall, dichotomously branched, densely glandular hairy.

Seed subterete in cross section, face concave.

Branchlets subterete, brown to gray-brown, glabrous.

Stem branched, subterete, to more than 1 m, woody, slightly striate.

Rhizome creeping, subterete, 2--7 mm thick, sometimes with swollen nodes.

Leaves shorter than scape, 0. 5--1(--2) mm wide, semiterete to subterete, smooth, rarely scabrous along ribs and at margin.

upper part erect, subterete, slightly swollen at nodes, glabrous, young parts densely minutely brown glandular. Leaves opposite;

Petiole of basal leaf subterete, shorter than to about as long as blade, shortly strigose;

Vines woody. Branches subterete, not grooved, smooth, sparsely puberulous only at nodes, glabrous elsewhere;

Ovary subterete, ca. 2 mm, sessile or obscurely stipitate, glabrous, or rarely apex sparsely pubescent; style short to almost absent;

Branchlets brown turning gray-brown or gray-red when old, subterete, sericeous-villous initially, later glabrescent;

Petiole of basal leaf subterete, shorter than or ca. as long as blade, muricate beneath;

petiole purple-red, ca. as long as blade, subterete, glabrous or pilose near blade;

Branchlets brownish or gray, subterete, striate, glabrous;

Petiole of basal leaf ca. as long as blade or longer, subterete, glabrous;

Branchlets brown-purple, subterete, stout, ca. 5 mm in diam. , plicate, glabrous throughout;

Petiole of basal leaf purplish red, subterete, 3-10 cm, stout, glabrous or papilliferous;

Stems terete or obtusely 4-sided to subterete, densely setose and puberulous, glabrescent or glabrous when older;

petiole purple-red, subterete, 4-10 cm, stout, glabrous or muricate;