A revision of Microchirita in Thailand 
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green above, ovate to lanceolate, 2.8-11 x 1.5-6.8 cm (basal leaf likely to have been 
larger but not seen), 1.6-1.9 times as long as wide, base truncate to shortly attenuate, 
apex acute to acuminate, eglandular hairy above and beneath, margin ciliate, margin 
entire, 7-8 pairs of secondary veins (basal leaf not seen), venation slightly sunken 
on the adaxial side. Inflorescence cristate, many-flowered, floral axes hispid with 
mixed eglandular and glandular hairs; peduncles extremely reduced and fused with 
each other; bracts absent; pedicels 2-15 mm long. Calyx pale green, c. 9.5 mm long, 
tube 5-7 mm long, lobes narrowly lanceolate, c. 8.5 x 1.5 mm, apex narrowly acute 
to acuminate, lobes not imbricate, with sparse eglandular hairs outside and an even 
sparser indumentum inside, mixed with sessile glands. Corolla c. 23 mm long, tube 
purple, lobes purple-blue, mouth pale blue, with a yellow ventral marking and a dark 
purple patch at the base of the upper lobes, tube narrow, bent downwards, abruptly 
widening, outer side hairy throughout, inside densely covered in eglandular hairs in 
the mouth and dense sessile glands over the ventral yellow spot; tube c. 13.5 mm 
dorsally, c. 14 mm ventrally and laterally; upper lobes c. 5.5 x 8.5 mm, lateral lobes c. 
5.5 x 8 mm, ventral lobe c. 7 x 8 mm. Stamens arising c. 9 mm above the corolla base, 
filaments straight, c. 2 mm long, c. 0.5 mm diameter, without any projection; anthers 
ligate, with an indumentum of long brown hairs growing on the outer end and short 
white hairs growing on the inner end, c. 1.1 x 1.3 mm; lateral staminodes c. 1 mm 
long, arising c. 8 mm above the corolla base, central staminode c. 0.8 mm long, arising 
c. 9 mm above the corolla base. Disk annular, c. 0.9 mm. Pistil c. 13 mm long; ovary c. 
8 mm long, c. 1 mm diameter, glabrous in the basal 1/3, eglandular tomentose above; 
style enantiostylous, c. 5 mm, eglandular hairy; stigma 0.8 mm long, densly glandular 
hairy, shallowly bilobed, lobes rounded, c. 0.4 mm. Fruit straight, sparsely eglandular 
hairy, 3-5 cm. Seeds c. 0.4 x 0.2 mm, brown, elliptic. 
Distribution. Eastern Thailand. 
Habitat. On limestone. 
Provisional IUCN conservation assessment. Data Deficient (DD). This species is only 
known from the type locality and too little is known of its distribution or possible 
threats (except that the single collection was not made in a protected area). 
Notes. This species has been named after the country to which it is endemic. 
27. Microchirita tubulosa (Craib) A.Weber & D.J.Middleton, Taxon 60: 79 (2011). 
- Chirita tubulosa Craib, Bull. Misc. Inform. Kew 173 (1922); Barnett, FI. Siam. 
3: 227 (1962); Wood, Notes Roy. Bot. Gard. Edinburgh 33: 190 (1974); Burtt, Thai 
Forest Bull., Bot. 29: 89 (2001). - TYPE: “described from plants grown from seed 
collected by Kerr. Flowered in October 1921” (lectotype ABD, first step designated 
by Wood (1974: 190), second sted designated here [the specimen which matches the 
image deposited inE, barcode E00155288]; isolectotypes ABD, E). (Fig. 17) 
