A revision of Microchirita in Thailand 
263 
B2ab(iii,iv). This species is only known from the type collection in the Huppatat Non 
Hunting Area, where only one, small population was observed. The limestone range 
there is only about 12 km 2 in total and is subject to disturbance from tourism. There are 
no collections from the nearby Khao Pha Ra, and the area is surrounded by cultivated 
land. 
Additional specimens examined. THAILAND: Uthai Thani: Lan Sak, Huppatat Non Hunting 
Area, 19 Sep 2015, Tanming, W. 901 (QBG). 
Notes. This species can be recognised by the small, personate corolla and the glabrous 
anthers. The measurements reported are largely based on the original publication in 
Puglisi et al. (2016), integrated with the newly acquired material. 
21. Microchirita purpurea D.J.Middleton & Triboun, Thai Forest Bull., Bot. 41: 14 
(2013). - TYPE: Thailand, Chanthaburi, Kaeng Hang Maeo, Khao Chamao National 
Park, Wat Khao Wong Kot, 30 m alt., 27 August 2012, Middleton, D.J., Karaket, 
P., Suddee, S. & Triboun, P. 5681 (holotype BKF; isotypes A [00435722], BK, E 
[E00626983], K, P [P00966760], QBG, SING [SING0229833]). (Fig. 13D-F) 
‘Chirita sp. nov.?’ in Barnett, FI. Siam. 3: 228 (1962). 
Caulescent herb 25-100 cm tall with elongated stem runners, internodes 2-10 cm. 
Stems succulent, green with reddish parts, with a sparse hispid eglandular indumentum; 
branches sometimes arising from the petioles. Leaves opposite, with the exception of 
the basal leaf; petioles 2-9.5 cm long, reddish, sparsely eglandular hairy; blades pale 
green above and beneath, ovate or obovate, 4.3-20 x 2.7-9.5 cm, 1.3-1.8 times as 
long as wide, base cordate, apex acuminate, sparsely hairy above and beneath with a 
dimorphic indumentum of longer and shorter eglandular hairs ciliate along the margin, 
margin entire, 9-23 pairs of secondary veins, steeply ascending, venation slightly 
sunken above and raised beneath in fresh material, flat in dry specimens, tertiary 
venation inconspicuous. Inflorescences cristate, peduncles reduced or emerging 
and fused together; peduncle absent or to 5 mm long; bracts absent; pedicels pale 
green or tinged with reddish purple, 5-30 mm long, densely pubescent. Calyx green, 
actinomorphic, completely divided to base, lobes narrowly ovate, 7-9.5 x 1.5-1.9 
mm, apex acuminate, pubescent. Corolla 24-30 mm long, purple, slightly paler 
on tube and lobes, darker in the throat, tube narrow at base, curved, then widening 
abruptly into a campanulate upper tube, lobes not spreading, purple, eglandular hairy 
outside, glabrous inside, except for a patch of glandular hairs dorsally in the tube by 
the anthers; tube c. 19-19.5 mm ventrally; lobes broadly orbicular, apices rounded, 
upper lobes 4x6 mm, lateral lobes 6 x 9.5 mm, ventral lobe c. 5-8.5 x 13-15 mm. 
Stamens arising from the point where the tube widens, c. 9 mm above the corolla base, 
filaments upright, glabrous, c. 1.5 mm long, c. 0.2 mm wide; anthers white or pale 
yellow, attached at a right angle from the filament, with hairs by the filament insertion. 
