244 
Card. Bull. Singapore 69(2) 2017 
Provisional IUCN conservation assessment. Data Deficient DD. The known EOO and 
AOO for this variety would qualify it as Endangered if there were associated threats. 
However, most of the collections are old and distributions from the areas in Central 
Thailand cannot be verified. 
Additional specimens examined. Unknown locality: Cult Aberdeen, 9 Nov 1929, Kerr, A.F.G. 
“241 ” (ABD [2 sheets]). THAILAND: Ayutthaya: s.l., 21 Dec 1936, Kerr, A.F.G. 19891 (BK, 
BM, K). Bangkok: under 5 m, 3 Jan 1923, Kerr, A.F.G. 6717 (ABD, K, BM); 29 Nov 1925, 
Kerr, A.F.G. s.n. (ABD, BK, BM, K); 16 Oct 1919, Kerr, A.F.G. 3820 (ABD, BM, K); 9 Oct 
1920, Kerr, A.F.G. 3820A (ABD, BM, K); 5 Dec 1920, Marcan, A. 482 (BM, K); Wat Jum, 
6 Oct 1921, Kerr, A.F.G. s.n. (BM). Lop Buri: Ayuthia, 22 Oct 1926, Smith, H.M. s.n. (BM). 
Prachuap Khiri Khan: Khao Sam Roi Yot National Park, 3 Dec 1928, Put, N. 2521 (K); Pran 
Buri, Sam Roi Yot, 7 May 1974, Larsen, K. & Larsen, S.S. 33698 (AAU). 
Notes. This variety was first described by Craib (1930) as a species but was included 
in synonymy of Microchirita involucrata by Wood (1974). It is here reinstated at the 
rank of variety. The only distinguishing feature is the lack of an indumentum on the 
anthers. Given the otherwise identical morphology and the overlapping distribution, a 
varietal status is preferred for this taxon. 
11c. Microchirita involucrata var. gigantiflora C.Puglisi, var. nov. 
This variety differs from Microchirita involucrata var. involucrata in the longer 
flower (c. 35 mm vs. c. 20 mm) and the much smaller bracts (< 1 cm long in var. 
gigantiflora , > 1.6 cm in var. involucrata). - TYPE: Thailand, Nakhon Si Thammarat, 
Kha Nom, Khuan Thong, Khao Wang Thong Cave, 50 m, 20 December 2006, 
Pooma, R., Phattarahirankanok, K. & Sirimongkol, S. 6472 (holotype BKF; isotype 
E [E00311111]). 
Distribution. Peninsular Thailand (Nakhon Si Thammarat). 
Habitat. On limestone in evergreen forest. 
Provisional IUCN conservation assessment. Data Deficient DD. This variety is only 
known from the type collection and its distribution and potential threats to it are 
unknown. 
Notes. The floral characters match Microchirita involucrata var. involucrata, including 
key features such as the glabrous ovary and the loosely coherent anthers, except that 
the corolla parts are proportionately larger. 
12. Microchirita karaketii D.J.Middleton & Triboun, Thai Forest Bull., Bot. 41: 
17 (2013). - TYPE: Thailand, Chiang Mai, Chiang Dao District, Doi Chiang Dao 
Wildlife Sanctuary, Tam Pak Piang, 530 m alt., 20 September 2008, Middleton, D.J., 
