1.Sepals ovate or oblong, erect or ascending, glabrous, base of lateral pair substrate or not saccate.
或长圆形的萼片卵形，直立或上升，无毛，不囊状的侧对近囊状或的基部。
2.Sepals ovate or narrowly oblong, erect, glabrous or pubescent, base of lateral pair saccate or not.
萼片卵形或狭长圆形，直立，无毛或被短柔毛，囊状的侧对的基部与否。
3.Sepals ovate or oblong, erect, ascending, or rarely spreading, base of lateral pair saccate or not.
萼片卵形或长圆形，直立，上升，或很少平展，基部侧配对与否。
4.Sepals oblong (median pair) or broadly ovate (lateral pair), deciduous, glabrous, unequal, base of lateral pair saccate, margin membranous.
萼片长圆形（中间对）或宽卵形（侧对），落叶，，不等长，基部的侧对，边缘膜质。
5.Sepals oblong or linear, erect, pubescent, base of lateral pair saccate or not.
萼片长圆形或线形，直立，短柔毛，囊状的侧对的基部与否。
6.spur saccate, very short, slightly longer than basal auricles of sepals or not.
囊状的距，非常短，稍长于萼片的基部耳与否。
7.Sepals curved, often saccate, veins inconspicuous, margin broadly membranous, apex truncate.
萼片弄弯，经常囊状，不明显的脉，边缘宽膜质，先端截形。
8.Sepals oblong, free or rarely united, usually persistent, erect, equal, base of lateral pair not saccate, margin not membranous.
萼片长圆形，离生或很少合生，通常宿存，直立，等长，基部的侧对不，边缘而不是膜质。
9.Sepals broadly ovate, persistent, ascending, glabrous or puberulent, base of lateral pair not saccate.
宽卵形，宿存，上升的萼片，无毛或具微柔毛，不囊状的侧对的基部。
10.Sepals ovate or oblong, erect or spreading, rarely reflexed, glabrous or pubescent, base of lateral pair not saccate.
或长圆形的萼片卵形，直立或开展，很少反折，无毛或被短柔毛，不囊状的侧对的基部。