A revision of Microchirita in Thailand 
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Fig. 17. Microchirita tubulosa (Craib) A.Weber & D.J.Middleton. A. Inflorescence and side 
view of the flower; B. Lateral view of the flower. C. Front view of a mature flower. D. Front 
view of a young flower. A, C from Middleton, D.J. et al. 4809; B, D from Tetsana, N. et al 800. 
(Photos: A, C, D.J. Middleton; B, D, N. Tetsana) 
<75 km 2 , which would be within the threshold for an Endangered status except that 
the number of locations is too high for Endangered or Vulnerable. Nevertheless, many 
of the collection localities for this species are not in protected areas and the regions 
in which this species occurs are also where mining of limestone is particularly active. 
Additional specimens examined. Unknown locality: “145” coll. 9 Nov 1927 (ABD [2 sheets]); 
Cultivated at RBG Kew, 5 Nov 1923, 418-23 (K); various specimens with no data or barcode 
(ABD). THAILAND: Ayutthaya: Kanam Pasak, Keng Koi, 50 m, 9 Dec 1923, Kerr, A.F.G. 
7961 (ABD, BK, K). Chonburi: Sriracha, Koh Seechang Isl., 7 Nov 1969, van Beusekom, 
C.F. & Smitinand, T. 2039 (AAU, BKF, E, L, P); Siracha, Si Chang Island, 25 m, 10 Sep 1993, 
