A revision of Microchirita in Thailand 
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7-10 mm long, hairy, becoming glabrescent towards apex; stigma glabrous, 0.5-0.6 
mm long. Fruit straight or curved, 4-6.5 cm long, sparsely hairy. Seeds dark brown, 
elliptic, 0.4-0.5 x 0.2-0.3 mm. 
Distribution. Northeastern to Southeastern Thailand. Cambodia. 
Habitat. On limestone in evergreen forest. 
Provisional IUCN conservation assessment. Endangered EN B2ab(iii). Although 
this species has a large EOO, it is known from rather few collections and has a 
currently known AOO well within the range for an Endangered status, coupled with 
a fragmented distribution and the many threats to limestone habitats throughout the 
region from mining, tourism and land use changes. Within the EOO there are rather 
limited opportunities for the AOO to increase beyond the threshold for Endangered 
due to the lack of suitable habitats. 
Additional specimens examined. Unknown origin: Cultivated at RBGE from material grown 
at University Botanic Garden, Utrecht, ace. 800333, P12, Nov 1980, C13665 (E); Cultivated 
at RBGE from material grown at University Botanic Garden, Utrecht, ace. 800335, P12, Nov 
1980, C13667 (E); Cult Cantonspark, Mennega, E.A. 61-70 (E); Entry s.n. (K [2 sheets])); 
Cultivated in Hort. Aberdeen, 1931, “Kerr” 337 (L); Cultivated in Hort. Aberdeen, 1931, 
“Kerr” 338 (L). THAILAND: Khon Kaen: Phu Pha Man, Tadyai Waterfalls, 18 Nov 2011, 
Lakoet, C. 237 (QBG). Loei: Phu Luang Wildlife Reserve, Nam Tok to Pa Paw trail, 29 Sep 
1990, Chantaranothai, P. et al. 90/439 (BKF, K). Nong Khai: Ban Phu Ngam, Singhanat Ban 
Phot temple, 150 m, 26 Aug 2001, Pooma, R. et al. 2686 (BKF [2 sheets]). Prachin Buri: 
Krabin, Kao Sungto, c. 50 m, 10 Nov 1930, Marcan, A. 2561 (ABD [2 sheets], BK, BM [2 
sheets], K [2 sheets], E); Cultivated at Smithsonian Institution from Marcan 2561, accession 
78-139, Skog, L.E. & Staton-Hodapp, S. 5333 (US). Sa Kaeo: Khao Chakan Temple, 88 m, 17 
Oct 2010, Staples, G. et al. 1407 (BKF, E, K, SING). Sisaket: Khun Han, Sam Rongkiat Falls 
Arboretum, 200 m, 22 Dec 2005, Pooma, R. et al. 6094 (BKF, E). 
Notes. Microchirita elphinstonia is a yellow-flowered species recognisable by the 
filament, which is somewhat divided in two halves (it can be geniculated or more 
commonly twisted), and appears darker in the upper part than in the lower in dry 
specimens. The leaves are ovate and the secondary veins can be numerous and very 
close to each other, although this is not a consistent character, e.g. in the type material. 
6. Microchirita glandulosa C.Puglisi, sp. nov. 
Similar to Microchirita involucrata (Craib) Yin Z.Wang and M. rupestris (Ridl.) 
A. Weber & Rafidah) in having bracteate inflorescences. Differs from both in the bracts 
being fused only at the base (i.e. not divided as in Microchirita involucrata and not 
fused into a cup as in M. rupestris ), in the dimorphic indumentum of sparse, long 
eglandular hairs and dense short glandular hairs on the leaf (eglandular indumentum 
in M. involucrata and M. rupestris ), and in the tripartite calyx. It differs further from 
