A revision of Microchirita in Thailand 
251 
the localities are in protected areas with the associated threats to limestone habitats 
that entails. 
Additional specimens examined. THAILAND: Khon Kaen: Sum Pak Nam, Phu Pha Man 
National Park, Chum Phae, 377 m, 21 Oct 2007, Norsangsri, M. & Lakoet, C. 2789 (E, QBG); 
Chum Phae, Phu Pha Man National Park, Tham Phaphung section, 25 Oct 2007, Norsangsri, 
M. & Lakoet, C. 2811 (QBG). Loei: Phu Kra Dueng, 504 m, 6 Nov 2014, Tetsana, N. et al. 
883 (BKF, SING); Phukradung National Park, Sohme Krae area, 1000 m, 4 Oct 2003, Palee, 
P. 636 (CMUB). 
Notes. The epithet refers to the contrast between the colour of the corolla tube and the 
lobes. The specimens from Khon Kaen have denser inflorescences (up to 12 flowers) 
and a denser indumentum, but are otherwise alike. 
15. Microchirita luteola C.Puglisi, sp. nov. 
Similar to Microchirita tubulosa (Craib) A.Weber & D.J.Middleton but differs in not 
having spots inside the lateral corolla lobes, having an entire disk (usually dorsally cleft 
in M. tubulosa), glandular indumentum on the stems (vs. eglandular), and acuminate 
calyx lobes (vs. usually acute, more rarely slightly acuminate). It is also similar to 
Microchirita marcanii in the shape of the corolla, but differs in the mixed eglandular 
and glandular indumentum on many plant parts (eglandular only in M. marcanii 
(Craib) A.Weber & D.J.Middleton) and the corolla colour pattern (light yellow corolla 
with a yellow stripe vs. orange corolla with lateral purple spots). Finally, it differs from 
Microchirita elphinstonia (Craib) A.Weber & D.J.Middleton in having a glandular 
indumentum and in the larger and much paler yellow corolla. - TYPE: Loei, Nong 
Hin, Suan Sa Wan, Pha Ngam Forest Park, 662 m, 11 September 2014, Tetsana, N. et 
al. 829 (holotype BKF; isotype SING). (Fig. 11A-C) 
Caulescent herb to 50 cm tall, internodes 2.5-10 cm. Stems, petioles, pedicels and 
peduncles succulent, green and often tinged with reddish-brown, glandular and 
eglandular hispid; branches sometimes arising from the petioles of the basal leaf as 
well as the opposite leaves. Leaves opposite, apart from the basal leaf; petioles 0.1-1.5 
cm long; blades pale to mid green above, whitish green beneath, ovate, elliptic or 
obovate, 3.8-8 x 1.5-5.8 cm, 1.2-3.1 times as long as wide, base shortly attenuate to 
cordate, apex acute to acuminate, eglandular strigose above, hispid beneath, ciliate 
along the margin with eglandular hairs, margin entire or obscurely denticulate, 
7-17+ (leaf incomplete) pairs of secondary veins, venation slightly sunken above 
and raised beneath in fresh material, flat in dry specimens, tertiary venation visible 
in dry specimens. Inflorescences cristate, 1^1-flowered; peduncles 4-10 mm long, 
shortly fused with each other; bracts absent; pedicels pale green to reddish brown, 
3-25 mm long. Calyx reddish brown at the base, green apically, succulent at the base, 
tube c. 1.6 mm long, lobes imbricate at base, lanceolate, 14-17 x 3-3.5 mm, apex 
acuminate, margin entire, outside with short, patent, mixed glandular and eglandular 
