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rachis
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*['reikiz]\nn. 脊椎, 脊柱, 花序轴\n【医】 脊柱, 脊椎, 花序轴, 叶轴
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详细解释：
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以下为句子列表：
英文: Inflorescence paniculate, rachis tawny tomentose; female flowers borne on basal part of the inflorescence.
中文: 花序圆锥状；花序轴被灰黄色短绵毛；雌花著生于花序轴下部。
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英文: Leaves bipinnate, 10-25 cm long, usually with 2 pairs of pinnae, rachis often ending in a tendril; pinnae with 2-4pairs of leaflets and terminal tendrils; leaflets opposite, oblong or long obovate, 3-9cm long, 1.5-4cm wide, apex obtuse or emarginated, bas
中文: 叶为二回羽状复叶，长10-25厘米，叶轴先端常变为卷须，羽片通常2对，顶生1对羽片变为卷须；小叶2-4对，对生，长椭圆形或长倒卵形，长3-9厘米，宽1.5-4厘米，先端钝、微凹，基部略偏斜。
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英文: Leaves crowded near apex of the trunk, spirally arranged; stipes dark brown, with sharp spines; lamina large, oblong, tripinnate; pinnae 17-20 pairs, alternate, longest one to 60 cm long, the basal one reduced; rachis short-spiny; pinnules 18-20 pairs, se
中文: 叶螺旋状排列，聚生于茎端；叶柄棕色，具锐刺；叶片大，长矩圆形，三回羽状深裂；羽片17-20对，互生，最大的长达60厘米，基部一对缩短，羽轴有短刺；小羽片18-20对，无柄或近于无柄，披针形，长达10厘米，宽2.5厘米，深裂几达中脉；末回裂片多少镰状，有齿。
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英文: Likewise, a plumulaceous tuft of barbs evolved before the pennaceous feather with a rachis because the rachis is formed by the fusion of barb ridges.
中文: 同样的，绒羽的羽枝簇比拥有羽轴的正羽更早演化出来，因为羽轴是由羽枝脊接合而成。
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