- Calyx and leaf are similar, labellum 3 crack, base the ministry surrounds staminal lower part, in lobation extend and remarkable.
- The flower has short canister, corollaceous 2 lips, lobation is unequal, diversity of design and color, have white, purple, lilac or pink.
- Lobation wraps around needle form or long quadrature circle, have toothed, the reverse side of foliaceous predestined relationship provides oily gland to nod, have strong stink.
- Foliaceous each other is born or opposite, the leaf breaks up for 2 Hui Yu shape, lobation is few and far between forked shape, lobule opposite or incorrect unripe, line form, whole reason.
- 5 calyx lobation, have small hair;
- Calyx bell shape, lobation triangle;