13(12) Plants usually thorny; twigs thornlike, bearing leaves and flowers, or twigs with needlelike thorns; leaf blade small, usually shorter than 7 cm.
植株通常多刺；小枝刺状，着生
和花，或小枝具刺；小
，通常短于7
米
13(12) Plants usually thorny; twigs thornlike, bearing leaves and flowers, or twigs with needlelike thorns; leaf blade small, usually shorter than 7 cm.
植株通常多刺；小枝刺状，着生和花，或小枝具刺；小，通常短于7米
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