1 | Plants seemingly leafless |
1' | Plants leafy |
2 | Inflorescence with a peduncle 2-4 mm long; fruit tuberculate |
2' | Inflorescence sessile or nearly so; fruit smooth or papillose |
3 | Fruit papillose, with persistent tepals at the apex |
3' | Fruit smooth, without persistent tepals at the apex |
4 | Stem internodes quite flat, 3-10 mm wide |
4' | Stem internodes terete or if flattened distinctly angular, 0.5-3(-5) mm wide.. |
5 | Fruit globose, white; internodes angular |
5' | Fruit ellipsoid, yellow; internodes terete or angular, distinctly longitudinally ribbed |
6 | Fruit tuberculate |
6' | Fruit smooth or minutely punctate |
7 | Leaves linear, less than 3 mm wide, soon falling |
7' | Leaves narrowly elliptic to obovate, 10-35 mm wide, long persistent |
8 | Male flowers, when present, central in the inflorescence |
8' | Male flowers, when present, lateral in the inflorescence |
9 | Leaves linear, 3-5 mm wide |
9' | Leaves spathulate to obovate, 12-25 mm wide |