1.Leaf blade usually 3-lobed or unlobed when young, base rounded or slightly cordate; nutlets conspicuously veined.
幼时的叶片通常3浅裂的或不裂,基部圆形或稍心形;显著的小坚果脉。
2.leaf blade unlobed, pinnately veined, sometimes stipulate at base, paired glands at apex of petiole.
叶片不裂,成羽状脉,有时在基地具托叶,在叶柄的先端具成对腺体。
3.Leaf blade base cuneate to narrowly so, margin unlobed, long ciliate.
叶片基部楔形到狭如此,边缘,具长缘毛。
4.upper lip unlobed, oblong, ca. 3 mm. Stamens inserted at corolla sinuses.
上唇不裂,长圆形,在花冠凹缺着生的约3毫米雄蕊。
5.upper lip unlobed, ovate-oblong, ca. 2 mm wide.
上唇不裂,卵状长圆形,约2毫米宽。
6.31 (30) Leaf blade adaxially glaucous with metallic shine, unlobed.
叶片正面有白霜的具金属光泽,不裂。
7.upper lip unlobed, oblong, margin entire or shortly 2- or 3-toothed, rarely 2-lobed.
短的上唇不裂,长圆形,边缘全缘或2或3齿,很少2裂。
8.upper lip unlobed, ovate to oblong, 1. 5-2 mm wide, emarginate to truncate.
上唇不裂,卵形的到长圆形,1.5-2毫米宽,微缺的到截形。
9.Samara 8-12 cm; leaf blade 3-lobed or unlobed, margin usually entire.
12厘米;叶片3浅裂的或不裂,边缘通常全缘。
10.upper lip unlobed, ovate to ovate-oblong, 1. 5-2 mm wide.
上唇不裂,卵形的到卵状长圆形,1.5-2毫米宽。