A revision of Microchirita in Thailand 
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Kerr A.F.G. 20571 (ABD). THAILAND: Nakhon Nayok: Nang Rawng, c. 100 m, 24 Nov 
1937, Smitinand, T. 3881 (BKF). Nakhon Ratchasima: Cultivated at RBG Edinburgh from 
Middleton, D.J. 5641, accession number 20121420, 21 Nov 2012, Middleton, D.J. 5288 (E, 
SING [2 sheets]); Pak Chong, Wat Tham Phrom Machan Thammaram, 480 m, 22 Aug 2012, 
Middleton, D.J. et al. 5641 (BKF, E); Pak Chong, Khao Yai National Park, 19 Sep 2002, 
Charoenchai, P. & Poompuang, S. 329 (CMUB); Khao Yai National Park, Nam Dohk Lek 
Falls, 20 Oct 2003, Palee, P. 646 (E); Khao Yai National Park, 8 Aug 1979, Shimizu, T. et al. 
9481 (BM, L). Saraburi: Ban Nawng Bua, 1 Oct 1927, Put, N. 1116 (ABD mixed specimen, 
see also M. tubulosa ); Muak Lek, Khao Hin Fon, Pa Chai Badan, 19 Nov 2011, Suparinyo, 
P.P. s.n. (BKF [2 sheets]); Muak Lek, 3 Sep 1928, Put, N. 1854 (K); Cult. Hort. Bot. Reg. Kew 
from Marcan 1872, 11 Nov 1925, 685.25 (K); Khao Sawng Phi Nawng, c. 400 m, 4 Oct 1963, 
Smitinand, T. & Sleumer, H.O. 1348 (BKF, E, K, L). 
Notes. This species is easily recognised by the large, orange corolla. It is most similar to 
Microchirita tubulosa, which however has a white flower with purple lateral markings 
and a ventral yellow line. 
In the protologue, Craib (1926) cited the wild collection Marcan 1872 and 
a cultivated plant grown in Aberdeen from seeds of this plant and noted that the 
description was largely based on the cultivated plant. This would make the cultivated 
plant a better choice for lectotypification but we have been unable to find any material 
unequivocally vouchered from this living collection in Aberdeen before publication of 
the protologue. 
17. Microchirita micromusa (B.L.Burtt) A.Weber & D.J.Middleton, Taxon 60: 778 
(2011). - Chirita micromusa B.L.Burtt, J. Roy. Hort. Soc. 85: 28 (1960); Barnett, FI. 
Siam. 3: 226 (1962); Wood, Notes Roy. Bot. Gard. Edinburgh 33: 194 (1974); Burtt, 
Thai Forest Bull., Bot. 29: 88 (2001). - TYPE: Thailand, Nakhon Nayok, cult, in 
Montreal Botanic Garden from seeds collected by Raymond & Smitinand, Raymond, 
M. ref. 106-59 (holotype E [E00155279]). 
Caulescent herb to 30 cm tall, internodes 4-7 cm long. Stems succulent, glabrescent 
or sparsely eglandular hairy, branching from the petiole of the basal leaf. Leaves 
opposite apart from the basal leaf; petioles to 3 cm long, glabrescent; blades lanceolate 
to elliptic, 7-25 x 4.1-12 cm, 1.7-2.5 times as long as wide, base shortly attenuate to 
subcordate, apex acute to broadly acuminate, with eglandular hairs above and sparse 
hairs beneath, margin entire or minutely serrulate, 8-18+ pairs of secondary veins. 
Inflorescences cristate, 4-10-flowered (20 according to the protologue), floral axes 
sparsely eglandular hairy to glabrescent; peduncles short and fused with each other; 
bracts absent; pedicels straight or curved, 7-16 mm long. Calyx actinomorphic, lobes 
divided to base, lanceolate, 7.5-13 x 1.2-1.7 mm apex acute, margin entire, with 
minute glands on both sides, and a sparse eglandular indumentum outside on margin 
and midrib. Corolla 20-26 mm long, yellow with an orange patch ventrally, narrow at 
base then gradually broadening, with eglandular hairs along the upper part of the tube 
and glandular hairs inside by the mouth; tube c. 16.5 mm long dorsally, c. 17.5 mm 
