ZINGIBERACEZE (H. N. Ridley) 183 
A. cereum Hook. fil. Oban; n. 83. The flowers are shown 
by.a drawing to be pure white. 
A. eitratum Pereira. Oban; n. 90. A beautiful drawing 
from life gives the large bracts as white-veined and shaded at 
the base with violet outside, and darker red-brown within; the 
calyx white, with violet shadows; the lip rosy-white, darkening 
on the edge and in the throat. The stalk of the leafy stem and 
long curling bilobed ligule are purplish ; the lamina of the leaf is 
tinted in parts red and purplish. 
Costus paueiflorus K. Schum.  Represented by a coloured 
drawing. The corolla is rose-pink with a central yellow blotch 
on the lip. 
Costus (Metacostus) Talbotii Ridl. sp. nov. Planta epiphytica 
caule gracili ramoso elongato ; foliis ellipticis acuminatis vel longe 
acuminatis subcoriaceis glabris, basibus rotundatis vel breviter 
angustatis, nervis (in sicco conspicuis) circiter 14, petiolo brevi; 
ligulis tubulosis elongatis papyraceis brunneis glabris internodia 
in toto vel ultra medium tegentibus; spicis lateralibus extra- 
axillaribus ; bracteis ovatis coriaceis obtusis latis primo pubescen- 
tibus mox in marginibus solum hirtis, supremis carinis brevibus 
obtusis mucroniformibus ; floribus multis in paria digestis ; calyce 
cyathiformi superne dilatato rubro aequaliter tridentato ; corollae 
tubo calycem aequante, lobis oblongis obtusis roseis ; labello late 
obovato marginibus undulatis albo linea mediana pilis brevibus 
atrorubentibus tecta ; anthera labello breviore, connectivo (appen- 
dice) elongato angustiore, basi lobis 2 brevibus onusta; ovario 
obscure trilobo apice minute pubescenti. 
Oban; n. 1521. Also Cameroons, Bipinde; Zenker, n. 8893 in 
Herb. Kew. 
Caulis internodiis 2 cm. longis, 5 mm. in diametro ; foliis 
15-17 cm. longis, 3 em. latis, acumine 2 cm. longo, petiolo 4 mm. 
longo; spica 2 cm. longa; corolla 2 em. longa, 1 cm. lata ; labello 
3 em. longo, 1 em. lato. 
This species is allied to C. lateriflorus Baker in its lateral inflor- 
escence which is unusualin the genus. It differs from that species 
in its narrower elliptic less coriaceous leaves, the presence of large 
ovate bracts on the capitulum and smaller flowers. According to 
the field-notes the bracts are bright transparent pink, paler, almost 
white, at the base; the corolla white, with bright yellow in the 
mouth of the lip. z 
Halopegia azurea K. Schum. There are a number of 
specimens and three sketches of Halopegia which ditfer somewhat 
in appearance. We have first the typical form, in which the _ 
flower-spikes are still enclosed in the sheath of the subtending 
