A revision of Microchirita in Thailand 
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sparsely eglandular hairy or glabrescent in the bottom half, hairier towards the apex; 
style arising at almost a right angle to the ovary, 8.5-9.5 mm, eglandular hairy; stigma 
c. 0.7 mm long, glabrescent, bilobed, lobes rounded, 0.3-0.5 mm. Fruit and seeds not 
seen. 
Distribution. Northern and Northeastern Thailand. 
Habitat. On limestone in dry evergreen forest. 
Provisional IUCN conser\>ation assessment. Vulnerable Blab(iii). This species is only 
known from a few collections and has an EOO of < 6,000 km 2 . Not all of the localities 
are within protected areas. Its AOO might suggest a status of Endangered but much 
of the potential distribution has not been adequently explored to be confident that its 
AOO is within the limit. 
Additional specimens examined. THAILAND: Khon Kaen: Choonpa [Chum Phae], 23 Nov 
1963, Pradit 738 (BK). Loei: Phu Luang Wildlife Reserve, Nam Tok to Pa Paw trail, 29 Sep 
1990, Chantaranothai, P. et al. 90/439 (BKF, K). Phitsanulok: Noen Maprang, Bahn Mung, 
Thung Salaeng Luang National Park, 85 m, 31 Aug 2008, Sreepoowiang, K. K 52 (SING); 
Noen Maprang, Tham Pha Tha Phon Non-Hunting Area, 9 Sep 2011, Norsaengsri, M. & 
Insea, R. 8188 (QBG); Noen Maprang, Tham Pha Tha Phon Wildlife Sanctuary, 17 Nov 2010, 
Maknoi, C. 3973 (QBG). 
Notes. This species is named after Dr Naiyana Tetsana from the Forest Herbarium 
Bangkok, who collected and shared a number of specimens and photos of the new 
species described in this article. Microchirita tetsanae has individuals with purple- 
blue and cream-white flowers, sympatric in Phitsanulok. No morphological characters 
support a possible recognition of these as different taxa and they are treated here only 
as colour forms of the same species. It is also reported from Uttaradit (photos from 
Pranee Nangnam seen). 
26. Microchirita thailandica C.Puglisi, sp. nov. 
Species most similar to Microchirita tetsanae C.Puglisi in the colour pattern of the 
corolla, differing in having a narrower tube which widens abruptly (gradually widening 
in M. tetsanae ), all corolla lobes imbricate (vs. lateral lobes not imbricate with the 
upper in M. tetsanae ), a shorter ventral tube, and in not having a projection at the 
anther insertion. - TYPE: Thailand, Chaiyaphum, Phak Dee Chumphon, Wat Thum 
Wua Daeng, 460 m, 8 November 2014, Tetsana, N. et al. 904 (holotype BKF; isotype 
SING). (Fig. 16C-E) 
Caulescent herb 10-50 cm tall, internodes 3-6 cm. Stems succulent, with sparse 
eglandular indumentum, branching from the basal petiole. Leaves opposite, apart 
from the basal leaf; petioles 0.3-0.8 cm long, sparsely eglandular hairy; blades mid 
