1.staminodes present or not, sometimes persistent, awl-shaped, spatulate, or petaloid, sometimes connected into a tube.
退化雄蕊有或无，有时宿存，锥形，匙形，或者花瓣状，有时合生成管。
2.staminodes when present petaloid, tightly enclosing style and stigma, alternating with petals.
退化雄蕊当存在时瓣状，紧紧包围花柱和柱头，与花瓣互生。
3.Lateral staminodes petaloid, larger than corolla lobes.
侧生退化雄蕊瓣状，比花冠裂片大的。
4.Lateral 2 staminodes of outer whorl petaloid, or forming small teeth at base of labellum, or adnate to labellum, or absent.
外轮的侧面的2个退化雄蕊花瓣状，或者在唇瓣基部形成小齿，或者与唇瓣贴生，或者无。
5.Petaloid appendages 10, scale like, inserted at throat of tube, obviously densely pilose at anthesis.
瓣状附属物10，鳞片状，着生在筒的喉部，在花期明显密被柔毛。
6.Fertile stamen ca. 3 mm, with a yellow, petaloid appendage.
能育的雄蕊约3毫米，具黄，瓣状附属物。
7.Style with filiform, slender, or petaloid branches.
花柱丝状，纤细，或者形成花瓣状的分支。
8.Sepals 5 or more, petaloid, yellow, rarely white or red, obovate or elliptic, caducous.
萼片5或更多，瓣状，黄，很少白色或红色，或椭圆形，早落。
9.Sepals 4, greenish, not petaloid, inserted at base of ovary, sometimes persistent.
萼片4，带绿色，不瓣状，着生的子房基部，有时宿存。
10.Sepals 5, often petaloid, caducous or persistent, imbricate.
萼片5，通常，早落或宿存，覆瓦状。