Thismia kelabitiana was found in the Kelabit Highland in Sarawak/Borneo/Malaysia and is described in Dancak et al. (2018). The species has coralloid roots and a mitre formed by the inner tepal lobes, hence, it belongs to sect. Sarcosiphon (Kumar et al. 2017). However, it has several features that makes it unique. Apart from the comparatively large flowers (almost 3 x 2 cm in length and width) the bright yellow mitre built by the inner tepal lobes is rather delicate with filiform colums and a small cap-like roof with indentions. The outer tepal lobes are dissolved to a rim of coarse teeth, also yellow in color. Thismia goodii, also from Borneo, is similar to T. kelabitiana, but the rim formed by the outer tepal lobes is entire, the crown of the flower is bright blue, the mitre is not as delicate, and the roof of the mitre lacks the indentions. Other species having roughly similar mitre forms, and interestigly also match in the form of anther appandages, are T. betung-kerihunensis and T. clavigera, but those have conspicuous upright appandages at the apex of the mitre.
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Thismia kelabitiana Dancak, Hrones & Sochor 2018