Habit
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Stems 1-3(-5) dm long, usually several times branched, secondary and tertiary branches conspicuously narrower than main stem, arising distichously
or obliquely, the main stem cylindrical for 1(2) internodes, abruptly flattened from the third node onward, second internode usually cylindrical, sometimes flattened, 15-25 mm long, (3-)4-8(-17) mm wide, the internodes rectangular or rarely obovate to narrowly obovate, 10-45 mm long, 6-25 mm wide, usually 1-5-nerved, rarely more. Axils distichous.
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