A revision of Microchirita in Thailand 
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Fig. 14. Microchirita rupestris (Ridl.) A.Weber & Rafidah. A. Unifoliate habit. B. Caulescent 
habit. C. Side view of the flower. D. Detail of the corolla. A, B from Middleton, D.J. et al. 
5721; C from Middleton, D.J. et al. 4836; D from Middleton, D.J. et al. 5204. (Photos: A, B, P. 
Karaket; C, D, D.J. Middleton) 
Distribution. Widespread in Thailand. Cambodia, Vietnam, Malaysia. 
Habitat. On rocks in shady areas. 
Provisional IUCN conservation assessment. Least Concern LC. This species is 
common and widespread. 
Additional specimens examined. THAILAND: Ayutthaya: s.l., c. 30 m, 21 Nov 1970, 
Smitinand, T, et al. 11377 (BKF, E). Chiang Mai: 400 m, 23 Nov 1920, Kerr, A.F.G. s.n. 
(BM); Sangampang, Muang Awn Cave, 525 m, 12 Oct 1989, Maxwell, J.F. 89-1221 (CMU, 
E); Mae On, 500 m, 7 Sep 2011, Pooma, R. et al. 7797 (BKF, E); Mae On, Doi Lohn, 13 Apr 
2005, Palee, P. 799 (CMUB); Mae Ping Rapids 150 m, 17 Dec 1913, Kerr, A.F.G. 3044 (BM, 
