Dendrobium Swartz
Habit: epiphytic herbs
Stem: branched, unbranched, tufted or separate, with leaves, noded
Leaf: characteristics: sheathing or noding at base, base clasping
Leaf: position: alternate
Leaf: shape: cylindric
Inflorescence: type: raceme, umbel
Flower: other characteristics: spreading, pendulous
Sepal: free or similar, lateral sepals adnate to column foot or labellum forming a mentum
Petal: narrower than sepals or as long as dorsal sepal, broader than sepals
Labellum: with sac or spur or auricles at base, 3-lobed, not lobed
Column: with column foot
Pollinia: number: 4
Pollinia: shape: subclavate or ovate