DR. LINDLEY ON WEST AFRICAN TROPICAL ORCHIDS. 129 
CALANTHE, R. Brown. 
1, C. corymBOosaA (§ Eucalanthe B.); foliis latis 5-nerviis acuminatis 
basi longe angustatis subtus pilosiusculis, corymbo denso tomentoso, 
bracteis lineari-lanceolatis ovariis longioribus, labello cuneato bilobo 
apiculo interjecto apice utrinque truncato dentato basi verrucoso dente 
parvo porrecto utrinque, calcare filiformi arcuato. 
“Herbaceous, 1} foot high. Corolla white and purple; at 5000 feet, 
on Fernando Po, Dec. 1860." (392) Mann. 
An ally of C. sylvatica and natalensis, from which its dense 
corymbose inflorescence distinguishes it, exclusive of other import- 
ant marks. The leaves are 4 inches broad. 
Porystacuya, Hooker. 
l. P. ENSIFOLIA; caule flexuoso compresso, foliis ensiformibus supremo 
spica simplici longiore, bracteis subulatis, floribus glabris, sepalis late- 
ralibus triangulis carinatis, labello oblongo levi hastato : lobis basila- 
ribus linearibus acutis nanis. 
“Flowers yellow." Prince’s Island (1986) Barter. 
This has much the habit of Epidendrum armeniacum (Póppig's 
Encyclia macrostachya), except that the spike is shorter and 
thinner. I do not find the usual pulverulent surface upon the 
face of the labellum. 
2. P. BIFIDA; caule stricto gracili, foliis ensiformibus acute bifidis, 
racemo simplici laxo glabro paucifloro, sepalis obtusis, petalis linearibus, 
labello sessili carnoso angusto obtuse trifido concavo pulvinare basilari 
oblongo apice unituberculato. 
" Epiphy te, 4000 feet, Fernando Po, Dec. 1860.” (649) Mann. 
This too has the habit of Epidendrum armeniacum. From P. 
ensifolia it differs in its much narrower sharply bifid leaves, its 
loose raceme, blunt sepals, and wholly dissimilar lip, the cushion 
of which is furnished at the point with a distinct downy tubercle. 
3. P. LAXIFLORA ; foliis oblongis basi angustatis, panicula patentissima 
racemosa pubescente, sepalis pubescentibus petalisque linearibus acu- 
tis, labello brevi unguiculato lamina rotunda cordata acute tridentata 
pulvinare lineari secus unguem. 
* Epiphyte, a foot high, Fernando Po, June 1860.” (437) Mann.— 
* Flowers pale yellow. On Mangroves. R. Nun." (2126) Barter. 
This is one of the larger species, with spreading panicles of race- 
mose flowers, in which respect it greatly resembles P. puberula. 
Its flowers are more than twice as large, and the lip has a long 
LINN. PROC.—DOTANY, VOL. VI. K 
