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首页> 外文期刊>Bothalia: African Biodiversity & Conservation >Leaf anatomy of the genus Ehrharta (Poaceae) in southern Africa: the Setacea group
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Leaf anatomy of the genus Ehrharta (Poaceae) in southern Africa: the Setacea group

机译：南部非洲Ehrharta（禾本科）的叶片解剖学：Setacea群

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The leaf blade anatomy of the taxa of the Setacea group of species of the genus Ehrharta is described and illustrated. This group includes E. rupestris Nees ex Trin. subsp.? rupestris, subsp.? tricostata (Stapf) Gibbs Russell and subsp.? dodii (Stapf) Gibbs Russell, as well as E. setacea Nees subsp.? setacea, subsp.? scabra (Stapf) Gibbs Russell, subsp.? uniflora (Burch, ex Stapf) Gibbs Russell and subsp.? disticha Gibbs Russell. All these taxa share a very characteristic leaf anatomy with inrolled or infolded leaves without keels and have adaxial ribs with interlocking prickles. The chlorenchyma is dense and compact with inwardly projecting invaginations visible in all taxa except? E. setacea subsp.? setacea. In E .? setacea subsp. scabra typical arm cells are present. Abaxial costal and intercostal zones are not differentiated and stomata are absent. The long cells are hexagonal or inflated with sinuous walls. Silica bodies are single or paired and rounded in shape. Small hook-like prickles with short barbs are common. Microhairs with a short, truncated distal cell occur. This leaf anatomical structure differs considerably from that of the other species groups recognized in African? Ehrharta and the Setacea group appears to be more distinct from the other groups than they are from each other.
机译：描述并举例说明了埃塞俄比亚属的Setacea类物种的分类单元的叶片解剖。这群人包括特里恩的鲁氏肠球菌。子rupestris，subsp。？ tricostata（Stapf）Gibbs Russell和亚种。 dodii（Stapf）Gibbs Russell以及E. setacea Nees子亚种？ Setacea，亚种？ scabra（Stapf）Gibbs Russell，子部门？ uniflora（Burch，前Stapf）Gibbs Russell和亚种。 disticha吉布斯·罗素。所有这些分类单元都具有非常独特的叶片解剖结构，其中没有龙骨的卷入或折叠的叶片，并具有带互锁的刺的后肋。绿藻密集且紧凑，在所有类群中可见向内突出的内陷，除了？ E. setacea亚种？ Setacea。在E。？刚毛亚种存在scabra典型的臂细胞。肋旁和肋间区没有区别，气孔不存在。长细胞呈六边形，或膨胀成弯曲的壁。二氧化硅主体为单个或成对并呈圆形。带短倒钩的钩状小刺很常见。出现具有短的远端细胞的微毛。这种叶片的解剖结构与非洲公认的其他物种群体有很大不同。埃哈塔（Ehrharta）和塞塔塞亚（Setacea）团体似乎与其他团体相比彼此之间的区别更大。

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