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- Seed glabrous or pustulose. 种子无毛或疱状突起。
- Palea along 2 keels glabrous or slightly ciliolate. 内稃沿着龙骨状的2或稍。
- Herbs, glabrous or villous, rarely hispidulous. 草本,无毛的或具长柔毛,很少具短硬毛。
- Stem erect, hollow, sulcate, glabrous or strigose. 茎直立,空,具槽,无毛的或具糙伏毛。
- Stamens 3, anthers glabrous or tips penicillate. 雄蕊3,花药或者端部。
- Stems erect, branched, glabrous or strigillose. 茎直立,分枝,或具短糙伏毛。
- Female flower: ovary glabrous or loosely pilose only at base. 雌花松弛的子房无毛的或具柔毛的只在基部。
- Subshrubs cushion-shaped, glabrous or cottony in leaf axils. 在叶腋里垫状,无毛或者似棉的亚灌木。
- Winter buds ovoid, glabrous or with scale margins ciliate. 冬芽卵球形,无毛的或具鳞片边缘具缘毛。
- Stem hollow, finely sulcate, glabrous or papilliferous near nodes. 空的茎,具细槽,无毛或乳头状突起接近节。
- Stems glabrous or pilose, stramineous, purple-brown with age. 茎无毛或具柔毛,麦秆色,紫褐色老时。
- Stems erect, base much branched, glabrous or sparsely hirtellous. 茎直立,基于多分枝,无毛或疏生。
- Capsule ovoid, 5-6 mm, glabrous or pilose, 2- or 3-valved. 蒴果卵球形,5-6毫米,无毛或具柔毛,瓣裂2或3。
- Petals ovate-elliptic, apex corniculate, glabrous or nearly so. 花瓣卵状椭圆形,先端,无毛或近无毛。
- Disk thick, pentagonous or 5-lobed, glabrous or hairy. 花盘厚,五角形或5裂,无毛或有毛。
- Stems erect, dichotomous, angulate, glabrous or pubescent. 茎直立,二歧,,无毛或被短柔毛。
- Ovary lobes truncate, glabrous or rarely minutely hispid at apex. 子房裂片截断,无毛或很少精确在先端。
- Nutlets obovoid or triquetrous oblong, glabrous or hairy. 小坚果倒卵球形或者三棱的长方形,无毛或有毛。
- Fruit glabrous or rarely sparsely covered with fine granules. 果无毛的或很少疏生为细小颗粒所覆盖。