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Leaf axils of sterile branches without spinescent bracteoles .

没有具刺的小苞片的不育枝的叶腋。

Shrubs or subshrubs , often with densely straggling branches ; twigs spinescent .

浓密蔓生的灌木或亚灌木，通常具分枝；小枝具刺。

Glumes and lemma glabrous , rarely laxly spinescent hairy .

颖片和外稃无毛，很少稀松的有毛。