270 
Card. Bull. Singapore 69(2) 2017 
identified during this study. This species can be recognised by the hairy anthers, the 
pale lilac corolla and the absence of a ventral line and lateral spots in the corolla. It is 
most similar to Microchirita lilacina, which has a broader mouth and glabrous anthers, 
and to M. albiflora, which is completely white and lacks sessile glands on the stem. 
24. Microchirita tadphoensis C.Puglisi, sp. nov. 
Most similar to Microchirita hamosa (R.Br.) Yin Z.Wang in the delicate habit and to 
M. bimaculata (D.Wood) A.Weber & D.J.Middleton in the shape of the corolla. Differs 
in having a shortly campanulate pale yellow corolla (white in Microchirita hamosa ) 
with a ventral darker yellow marking but no lateral spots (spots always present in M. 
bimaculata). - TYPE: Thailand, Nakhon Phanom, Ban Phaeng, Phu Langka National 
Park, Tad Pho Waterfall, 224 m, 23 October 2015, Suddee, S., Keiwbang, W. & Hemrat, 
C. 4980 (holotype BKF; isotype SING). (Fig. 15D-F) 
Herb to 20 cm tall, stem sparsely aglandular hairy, not branched, internodes c. 3 cm 
long. Leaves opposite, apart from the basal leaf; petioles 1-4 mm long, sparsely 
eglandular hairy; blade ovate to elliptic, 1.7-4.2 x 1.2-3.2 (a partial much larger basal 
leaf was seen that would be beyond these measurements if complete), 1.3-1.5 times as 
long as wide, base subcordate, apex acute to broadly acute, eglandular hairy on both 
surfaces, margin entire and ciliate, 7-9+ pairs of secondary veins, flat and scarcely 
visible on both sides. Inflorescence cristate, 1-5-flowered, floral axes eglandular 
hairy; bracts absent; pedicels 0.5-1.5 cm, straight or curved. Calyx pale green, slightly 
zygomorphic, lobes almost free, lanceolate-elliptic, 3-3.3 x 0.5-0.9 mm, lower lobes 
slightly larger than the upper, apex acute, margin entire, eglandular hairy outside, 
glabrous inside. Corolla c. 12 mm long, white outside, inside pale yellow with a yellow 
patch ventrally, base of tube narrow and curved, then gradually broadening, sparsely 
eglandular hairy outside, inside glabrous basally and with sessile glands apically and 
on the lobes; tube c. 9.3 mm dorsally, c. 9.7 mm ventrally and c. 8 mm between the 
lips; upper lobes c. 2 x 2.5 mm, lateral lobes c. 1.3 x 3 mm, ventral lobe c. 2 x 3 mm. 
Stamens arising c. 4.6 mm above the corolla base; filaments c. 2 mm long, 0.2 mm 
diamenter, straight, glabrous at the base, with sessile glands in the top half; anthers c. 
1.2 x 0.5 mm, probably ligate, with a small patch of straight hairs by the attachment, 
thecae strongly divergent; staminodes not seen. Disk absent. Pistil c. 10 mm long; 
ovary c. 5 mm long, c. 0.7 mm diameter, glabrous in the basal 1/3 to Vi, then eglandular 
hairy; style c. 3.5 mm, delicate, eglandular hairy; stigma with lobes c. 0.7 x 0.5 mm, 
somewhat plumose inside. Fruit eglandular hairy, more or less curved, 1.7-3.4 cm 
long, 0.7-1.2 cm diameter. Seeds dark brown to black, broadly elliptic and furrowed, 
c. 0.5 x 0.2 mm. 
Distribution. Northeastern Thailand. 
Habitat. On sandstone in dry evergreen forest. 
