228 
Card. Bull. Singapore 69(2) 2017 
National Park, Kang So Pa Waterfall, 350 m, 11 Oct 1979, Shimizu, T. et al. T-18365 (BKF). 
Tak: Mae Ramad, Ban Nam Ok-roo, 15 Sep 2005, Pooma, R. 5687 (BKF); Tha Song Yang, 
road to Mae Sariang, 832 m, 19 Oct 2014, Middleton, D.J. et al. 5790 (BKF, E); Tha Song 
Yang, Tham Ook Ru Temple, 100 m, 6 Sep 2013, Phaosrichai, P. & Wongnak, M. 21 (QBG). 
Notes. This species is broadly distributed across the North of Thailand. It is recognisable 
by the bright yellow corolla with lateral dark spots inside the throat, the often curved 
fruit, steep secondary veins, and the dull orange-silver hue of the abaxial side of the 
dry leaves. 
5 . Microchirita elphinstonia (Craib) A.Weber & D.J.Middleton, Taxon 60: 778 
(2011). - Chirita elphinstonia Craib, Bull. Misc. Inform. Kew 149 (1932); Barnett, FI. 
Siam. 3: 224 (1962); Wood, Notes Roy. Bot. Gard. Edinburgh 33: 195 (1974); Burtt, 
Thai Forest Bull., Bot. 29: 87 (2001). - TYPE: Cult, in Hort. Aberdeen from seeds 
of Marcan 2561, coll. Thailand, Krabin, Ban Keng, 30 m, limestone hill (lectotype 
K [K000545615], designated by Wood (1974: 195); isolectotypes A [00054810], 
ABD, B [B100277728], BK, BR [692324], C [C10012723], CHR [CHR213604], E 
[E00155273], L, LE [LE00017212] P [P00602511], SING, US [00126000]). 
Caulescent herb to 50 cm tall, internodes 3-10 cm long. Stems succulent, glabrous, 
branching from the petioles. Leaves opposite, apart from the basal leaf, but sometimes 
2 single basal leaves are present; petioles 0.5-1.4 cm long, sparsely eglandular hairy; 
blades ovate, 1-10.5 x 2-6.3 cm (paired leaves, basal leaf not measured), 1.5-1.8 times 
as long as wide, base shortly attenuate to seemingly cordate, apex acute to shortly 
acuminate, with short eglandular hairs above and very sparse hairs beneath, minutely 
ciliate along the margin, margin entire, 4-21+ pairs of secondary veins. Inflorescences 
cristate, can be congested and many-flowered; peduncles 0.2-5 mm long, fused with 
each other, glabrous and curved; bracts absent; pedicels 8-12 mm long, glabrescent or 
sparsely hairy, curved. Calyx pale green, actinomorphic, tube 0.5-1 mm, lobes elliptic, 
8-15 x 1.5-1.9 mm, apex narrowly acute, margin entire, sometimes with indistinct 
small teeth near the apex, eglandular hairy outside, especially on tip and margin, inside 
with sessile glands. Corolla 20-30 mm long, bright yellow, with lateral dark spots in 
throat, tube narrow, curved, then progressively widening, lobes spreading, eglandular 
hairy outside, lobes papillose, ventral lobe prominent; tube 17-21 mm long dorsally, 
17-20 mm ventrally, 17-23 mm laterally between lips; lobes elliptic, apices obtuse 
to rounded, margin irregular, upper lobes 2-4.5 x 5-6 mm, lateral lobes 5-7 x 6-7.5 
mm, ventral lobe 8-10 x 6.5-10 mm. Stamens arising 9.5-12 mm above the corolla 
base; filaments geniculate or twisted in the middle, pale in the lower half, darker 
above, glabrescent or sparsely hairy below the knee, glandular above, 4-5 mm long, 
0.3-0.5 mm wide; anthers yellow, with long eglandular hairs dorsally, 2.5 x 1.7-2.5 
mm, apically joined by a connective, thecae divergent; staminodes not seen. Disk 
partial, 0.4-0.5 mm high, or complete and 0.6-0.8 mm long. Pistil 18.5-20 mm long; 
ovary 5-8 mm long, 0.7-1.2 mm diameter, glabrous at the base, hairy apically; style 
