longus, 1-1.8 mm. latus, marginibus inferne leviter re- 
curvatis; lobi laterales leviter divergentes, ligulati vel 
oblanceolato-ligulati, apice rotundati vel fere truncati, 
4.5-5 mm. longi, 0.8-1.2 mm. lati; calear incurvatim 
dependens, inferne anguste cylindraceum, apice tantum 
inflatum, obtusum, 9-10 mm. longum. Coluwmna 3 mm. 
alta, pallide viridis; anthera erecta, loculis parallelis 2 
mm. longis, canalibus (et rostelli lobis lateralibus) leviter 
decurvatim patentibus 1.5 mm. longis, staminodiis lentic- 
ulari-ellipsoideis 0.8-1 mm. longis; brachia stigmatifera 
valde decurvata, labello adpressa, lingulata, complanata, 
22.5 mm. longa; rostelli lobus intermedius obtuse tri- 
angularis. 
Nortuern Ruopesia: Mwinilunga District, Dobeka Plain, one-half 
mile southwest of Dobeka Bridge, on sandy ground in open near edge 
of Cryptosepalum-woodland, Dec, 14th., 1937, Milne-Redhead 3664 
(Tyrer); plain north-east of Dobeka Bridge, on sandy ground in open, 
Dec. 30th., 1937, Milne-Redhead 36644. 
A rather striking little species characterised by the 
single basal leaf, the open inflorescence, the front petal- 
lobe directed downwards and adnate to the lip in the 
lower part, and by the shortly stalked anther in which 
the canals, instead of being porrect or curved upwards, 
are gently curved downwards. 
Habenaria (§. Diphyllae) unifoliata Swmmerhayes 
sp. nov.; affinis H. lthophilae Schlechter, a qua folio 
singulo, floribus paulo minoribus, petali partitione antica 
et labelli partitionibus lateralibus pro rata longioribus, cal- 
cari paulo breviore, antherae canalibus longioribus differt. 
Herba terrestris, 85-45 cm. alta; tubera globosa vel 
ellipsoidea, circiter 2 cm. longa, 1.5-2 em. diametro, 
breviter tomentosa. Molium singulum, basale, solo ad- 
pressum, suborbiculare, latissime et obtusissime apicula- 
tum, supra basin profunde cordatum, basi ipsa vaginans, 
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