A revision of Microchirita in Thailand 
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c. 2.5 x 1.5 mm, apically joined by a connective, thecae parallel; lateral staminodes 
c. 1 mm long, arising near the corolla base, central staminode c. 0.7 mm long, arising 
near the corolla base. Disk annular, lobed, 1 mm high. Pistil c. 12 mm long; ovary 5 
mm long, c. 0.5 mm diameter, glabrous; style 7 mm long, glabrous; stigma chiritoid, 
sparsely glandular, c. 1.2 mm long. Fruit green when immature, c. 4 cm long, c. 2 mm 
diameter, glabrous, curved. Seeds not seen. 
Distribution. Southeastern Thailand. Vietnam. 
Habitat. On limestone. 
Provisional IUCN conservation assessment. Endangered EN B2ab(iii). This species 
is common at the type locality and can be observed occurring high up on rather 
inaccessible cliffs. At the site where it was collected there is only about 1 km 2 of 
suitable habitat and the base of the outcrop and the surroundings are degraded by 
human activity. The only other locality where it has been collected is just over 400 
km to the SE from the type locality in southern Vietnam. Available limestone sites 
inbetween are rather few. 
Additional specimens examined. THAILAND: Rayong: 25 Oct 1960, Chandraprasong, K. 
69 (BK); Temple near Khao Chamao, 20 Sep 2000, Watthana, S. & Wongnak, M. 991 (QBG). 
Notes. This species can be recognised by the dark purple colour of the corolla, the 
abruptly campanulate corolla, and the small upper two lobes and the broad lower 
three lobes of the corolla. The description is largely based on the original publication 
(Middleton & Triboun, 2013), with some additional data. 
22. Microchirita rupestris (Ridl.) A.Weber & Rafidah, Taxon 60: 779 (2011); Rafidah, 
Gard. Bull. Singapore 69: 18 (2017). - Chirita rupestris Ridl., J. Straits Branch Roy. 
Asiat. Soc. 44: 59 (1905); Barnett, FI. Siam. 3: 227 (1962); Wood, Notes Roy. Bot. 
Gard. Edinburgh 33: 201 (1974); Burtt, Thai Forest Bull., Bot. 29: 89 (2001). - TYPE: 
Malaysia, Kedah, Langkawi, on damp rocks, sea level, November 1889, Curtis 
2120 (lectotype SING [SING0042989], designated by Puglisi in Rafidah (2017: 18); 
isolectoype SING [SING0042990]). (Fig. 14) 
Chirita glasgovii Ridl., J. Straits Branch Roy. Asiat. Soc. 44: 60 (1905). - TYPE: 
Malaysia, Perak, Waterloo Estate, December 1897, Robertson-Glasgow s.n. (holotype 
SING [SING0042988]). 
Chirita kerrii Craib, Bull. Misc. Inform. Kew 129 (1914); Barnett, FI. Siam. 3: 225 
(1962). - TYPE: Thailand, Mae Ping Rapids, Fa Man, in crevices of damp rock, 180 m, 
Kerr 2194 (lectotype K [K000545603], designated by Wood (1974: 200), isolectotype 
BM [BM000997770]). 
