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Review of species limits in Geissorhiza leipoldtii (Iridaceae: Crocoideae) and G. heterostyla with the recognition of new taxa plus important new records in the genus
South African Journal of Botany ( IF 2.7 ) Pub Date : 2016-09-01 , DOI: 10.1016/j.sajb.2016.05.006
P. Goldblatt , J.C. Manning

Abstract Field research and herbarium study in the genus Geissorhiza (Iridaceae) has led us to revise the taxonomy of some species. Geissorhiza leipoldtii was previously more widely circumscribed to include G. ixioides as synonym as well as collections that we recognize here as the new species G. nutans . Typical G. leipoldtii has upright to half nodding flowers with a pure white perianth and ascending stamens with longer anthers and usually equal filaments. Geissorhiza ixioides , last collected in 1897 and not again until now, differs in its mauve or pink flowers with a dark centre, short stamens, and short style dividing opposite the middle of the anthers. Geissorhiza nutans stands out in its smaller, nodding flowers with translucent white to pale mauve or pale pink perianth and unilateral, horizontal to drooping stamens with markedly unequal filaments, the upper one half as long as the lower two. We recognize two subspecies in G. heterostyla : subsp. heterostyla with a pubescent stem and nodding, usually blue to violet flowers; and subsp. rosea with a smooth stem and upright to half nodding, white, pale blue or pale mauve flowers. Geissorhiza now includes 102 species, all from the winter rainfall zone of southern Africa. In addition, we document significant range extensions in G. aspera and G. karooica , and report important new records for the critically endangered G. Geissorhiza malmesburiensis. These findings broaden our understanding of the diversity of Geissorhiza and assist in conservation assessments of the species.

中文翻译:

Geissorhiza leipoldtii (Iridaceae: Crocoideae) 和 G.heterostyla 的物种限制回顾,新分类群的识别以及该属的重要新记录

摘要 Geissorhiza(鸢尾科)属的实地研究和植物标本室研究使我们对某些物种的分类进行了修订。Geissorhiza leipoldtii 以前被更广泛地限定为包括 G. ixioides 作为同义词以及我们在此处将其视为新物种 G. nutans 的集合。典型的 G. leipoldtii 具有直立到半点头花,花被纯白色,雄蕊上升,花药较长,花丝通常相等。Geissorhiza ixioides 最后一次收集是在 1897 年,直到现在才再次收集,其不同之处在于其淡紫色或粉红色的花朵,具有深色中心、短雄蕊和在花药中间分开的短花柱。Geissorhiza nutans 以其较小的点状花朵而引人注目,花朵呈半透明的白色至淡紫红色或淡粉色花被和单边,水平到下垂的雄蕊具明显不等长的花丝,上半部与下两部等长。我们在 G.heterostyla 中识别出两个亚种:subsp。具短柔毛茎和点头的异柱花,通常开蓝色到紫罗兰色的花;和亚种。玫瑰具有光滑的茎和直立到半点头的白色、淡蓝色或淡紫红色花朵。Geissorhiza 现在包括 102 种,全部来自南部非洲的冬季降雨区。此外,我们记录了 G. aspera 和 G. karooica 的显着范围扩展,并报告了极度濒危的 G. Geissorhiza malmesburiensis 的重要新记录。这些发现拓宽了我们对 Geissorhiza 多样性的理解,并有助于对该物种进行保护评估。具短柔毛茎和点头的异柱花,通常开蓝色到紫罗兰色的花;和亚种。玫瑰具有光滑的茎和直立到半点头的白色、淡蓝色或淡紫红色花朵。Geissorhiza 现在包括 102 种,全部来自南部非洲的冬季降雨区。此外,我们记录了 G. aspera 和 G. karooica 的显着范围扩展,并报告了极度濒危的 G. Geissorhiza malmesburiensis 的重要新记录。这些发现拓宽了我们对 Geissorhiza 多样性的理解,并有助于对该物种进行保护评估。具短柔毛茎和点头的异柱花,通常开蓝色到紫罗兰色的花;和亚种。玫瑰具有光滑的茎和直立到半点头的白色、淡蓝色或淡紫红色花朵。Geissorhiza 现在包括 102 种,全部来自南部非洲的冬季降雨区。此外,我们记录了 G. aspera 和 G. karooica 的显着范围扩展,并报告了极度濒危的 G. Geissorhiza malmesburiensis 的重要新记录。这些发现拓宽了我们对 Geissorhiza 多样性的理解,并有助于对该物种进行保护评估。此外,我们记录了 G. aspera 和 G. karooica 的显着范围扩展,并报告了极度濒危的 G. Geissorhiza malmesburiensis 的重要新记录。这些发现拓宽了我们对 Geissorhiza 多样性的理解,并有助于对该物种进行保护评估。此外,我们记录了 G. aspera 和 G. karooica 的显着范围扩展,并报告了极度濒危的 G. Geissorhiza malmesburiensis 的重要新记录。这些发现拓宽了我们对 Geissorhiza 多样性的理解,并有助于对该物种进行保护评估。
更新日期:2016-09-01
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