ORCHIDACER (A. B. Rendle) 103 
Polystachya Dorotheae Rendle sp. nov. Caules subcom- 
pressae approximatae basi paullo inflatae et vaginis scariosis 
circumdatae ; foliis caulinis 4 e vaginis elongatis tubuliformibus 
lineari-oblongis vel lineari-oblanceolatis apice inaequali acutius- 
culis; scapo elongato bracteis scariosis parte inferiore tubuli- 
formibus arcte vestito superne nudo et puberulo ramoso, ramis 
multifloris ; bracteis florentibus ovatis superne acuminatis et 
recurvatis; floribus inter mediocres glabri ; sepalo dorsale elliptico- 
oblongo obtuso mucronato, sepp. lateralibus triangulari-oblongis 
subito et breviter acutis mentum obtusum efformantibus ; petalis 
linearibus apice spathulatis; labello trilobo basi cum crista 
mediana suffulto, lobis lateralibus late oblongis apice rotundatis 
margine integro, lobo mediano lato emarginato crenulato medio 
cristato ; capsula subsessili fusiformi. (Pl. 13, figs. 3, 4.) 
Oban ; n. 861. 
Plant 6 cm. high. Stem leafy below, passing above into the 
panicle. Leaves 10-30 cm. long, 2-3 cm. broad. Panicle 18 cm. 
long, branches (in fruit) to 8°5 cm. long. Flowering bracts 3 mm. 
long. Dorsal sepal 4:5 mm. long; lateral sepals, greatest length 
7 mm., chin 4:5 mm.  Peíals 4:5 mm. long, broadening at the apex 
to ‘7 mm.; lip 6 mm. long, greatest breadth 4:5 mm. Column short, 
thick, 2 mm. long. Fruit 17-18 mm. long. 
A member of the tessellata group of species, and from the descrip- 
tion and figure near the Congo species P. Huyghei De Wild., but 
distinguished by details of the flower such as blunt dorsal sepal and 
lip-lobe, spathulate petals, &c. 
Polystaehya nigeriea Rendle sp. nov. Species inter minores 
caulibus compressis basi in pseudobulbum fusiformem incrassatis ; 
foliis distichis a vagina compressa siccis sejunctis, lamina e basi 
plicata ligulata apice inaequali obtusa emarginata; scapo supra 
folia bracteis binis compressis spathaeformibus vestito puberulo 
densifloro ; bracteis florentibus e basi triangulare setaceis flores 
excedentibus saepe reflexis; floribus parvis glabris breviter 
pedicellatis ; sepalo dorsali late ovato concavo acuminato, sepp. 
lateralibus triangulari-ovatis breviter caudatis, mento late 
rotundato ; petalis lineari-acutis ; labello trilobo lobis lateralibus 
rhomboideis erectis, lobo mediano ovato-acuminato ; columna 
brevi crassa, rostello dentibus binis acutis instructo. (Pl. 13, 
figs. 5-9.) 
Oban ; n. 929. 
Stems 10-17 em. high, surrounded at the base by a mass of 
slender roots, and often associated with the persistent remains of 
stems of previous seasons. Leaves 4-11 cm. long, 9-18 mm. broad, 
separating from the persistent sheaths when dried. Raceme to 7 cm. 
long, or more. Flowering bracts to 8 mm. long. Dorsal sepal 
2°5-2°75 mm. long; lateral sepals 8:5 mm. long, length of base 
2:5 mm.  Petals 2:5 mm. long; lip 2:6 mm. long; lateral lobes 
1:5 mm. long; mid-lobe 1:75 mm. long. Column 2:5 mm. long. 
Ovary with pedicel glabrous, 3 mm. long. ; 
