pedicellus cum ovario circiter 2 mm. longus. Sepalwm 
intermedium erectum, ovato-oblongum, basi rotunda- 
tum, apice obtusum vel subrotundatum, 1.75-2 mm. 
longum, circiter 1 mm. latum, 2-8-nervium; sepala 
lateralia deflexa, incurvatim oblique ovata, apice subro- 
tundata, 1.25-1.5 mm. longa, vix 1 mm. lata, 2- vel 
subtrinervia. Petala patentia vel=recurvata, leviter ob- 
lique anguste ligulata, apice obtusa, 1.25-1.5 mm. longa, 
circiter 0.8 mm. lata, marginibus apice et basi exceptis 
papillato-ciliolatis, uninervia. Label/um inferum (vel anti- 
cum), sessile, ambitu ellipticum vel elliptico-quadratum, 
basi in auriculas rotundatas columnam + amplectentes 
decurrens, in toto (auriculis inclusis) circiter 1.75 mm. 
longum, medio circiter 1.5 mm. latum, marginibus un- 
dulatis, apice rotundatum leviter emarginatum, 5-ner- 
vium, basi tuberculis vel callis humilibus orbicularibus 
medio pulvino puberulento trapeziformi instructum. 
Columna brevis, porrecta, subteres, apice truncata, cir- 
citer 0.85 mm. alta; anthera hemisphaerica; fovea stig- 
matica elliptica; rostellum truncatum. 
NortHern Ruopesta: Mwinilunga District, just north of Mwini- 
lunga on shallow soil overlying laterite in Brachystegia-Isoberlinia 
woodland, Jan. 26th 1938, Milne-Redhead 4359 (Tyre) ‘“Tubers white, 
ringed; leaves green, plicate; flowers yellow-green.”’ 
The species is described from over 25 specimens dried 
or in liquid preservative. MM. pygmaea, as the name sug- 
gests, is the smallest species of the genus found so far in 
Africa, reaching at the maximum a height of 5 em. and 
being usually much smaller. Another striking feature is 
the very short stem, most of which is below the surface 
of the ground, the leaves consequently being practically 
at ground level. 
The species in general floral structure belongs clearly 
to the section Katochilos Schltr. in which the lip is an- 
terior in position. This section includes six other species 
in Tropical Africa and one in Madagascar. 
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