Taxonomy and phylogenetic position of Fimbristylis fusiformis, a new species of Cyperaceae from Thailand

Abstract

Fimbristylis fusiformis, an unusual new species of Cyperaceae from Thailand, is described and illustrated. This taxon has a single terminal spikelet per culm with a semi-distichous glume arrangement, bisexual flowers that lack perianth parts, and pistil with persistent style whose base is slightly swollen and trigonous nutlets with pubescent ribs. Phylogenetic reconstruction using ITS sequence data places this taxon in Abildgaardieae and sister to the rest of Fimbristylis. The species has a conservation status of Least Concern (LC).

Morpho‐palynological study of Cyperaceae from wetlands of Azad Jammu and Kashmir using SEM and LM

“…The species Fimbristylis dichotoma showed Heteropolar pollen type, spherical shape and monocolpate aperture with prolate shape of pollens; in our finding similar characters accept the shape which is different from the study of (Ghosh & Karmakar, ; Wangwasit, Muasya, Chantaranothai, & Simpson, ). Cyperaceae had thin exine with scanty ornamentation, tenui‐exinous present in the family with thicker nexine and thick sexine (Erdtman, ).…”

Re-discovery of Fimbristylis tenera (Cyperaceae) in Thailand

“…The genus Fimbristylis Vahl (1805) comprises 314 accepted species (POWO, 2024), distributed mainly in the tropics of both hemispheres (Kern, 1974) and especially in South Asia, Indo-China and Malesia (Simpson & Koyama, 1998). There were 63 species previously reported in Thailand (Simpson & Koyama, 1998;Maxwell, 2002;Wangwasit et al, 2012;Wangwasit et al, 2017). However, the recently described Fimbristylis fusiformis K. Wangwasit & D.A.Simpson (Wangwasit et al 2017) and F. ovata (Burm.f) J.Kern, were transferred to Abildgaardia by Larridon et al (2021).…”