220 DR. J. D. HOOKER ON THE PLANTS 
Caudez crassitie penne corvine. Folia sessilia, } unc. lata. Scapus bre- 
vis, bracteis compressis distiche imbricatis acutis tectus. Racemus 
3—4-pollicaris, rhachi valida angulata. Bractee fere 5 unc. long, mem- 
branaceo-glumaces. Flores purpurei?, glaberrimi. Sepalum superius 
cucullatum, lateralia planiuseula. Petala membranacea. Labellum 
crasse carnosum, columna brevius, brevissime unguiculatum, basi 
latiusculum, in apicem crassum truncatum attenuatum. Columna 
alata, alis in processus 2 breves subulato-productis. 
7. BoLBOPHYLLUM, sp.? 
Hab. Cameroons Mountains, alt. 5000 feet. (Fruit only.) 
Species parvula, caudice valido. Pseudobulbi breves, oblongi, tetrapteri, 
2-phylli. Folia 14 unc. longa, lineari-oblonga, in petiolum contracta. 
Scapus brevis, validus. Racemus rhachi compressa v. angulata, 
robusta. Bractee parve. Flores parvi. Sepala ovato-subulata. Petala 
parva, linearia. Labelium crasse carnosum, recurvum, obtusum, ex- 
cavatum. Columna aptera, ramis 2 subulatis porrectis. 
8. ANGRAECUM ARCUATUM, Lindl. 
Hab. Cameroons Mountains, alt. 4000-6000 feet. (FI. Nov.) 
The same as the Cape of Good Hope species, which ranges from 
Uitenhage to Natal. Lindleyidentifies a much larger form, gathered 
by Mann on the banks of the Nun, with the same. 
9. ANGRACUM, sp. 
Hab. Cameroons Mountains, alt. 5000 feet. (Fruit only.) 
Very similar to, but much smaller than, A. capitatum, Lindl. 
(ante, vi. 137). 
10. POLYSTACHYA ALPINA, Lindl. (ante, vi. 131). 
Hab. Fernando Po, alt. 6000 feet. (Fl. Dec.) 
11-15. Pon vsrAcHv x species 5. 
Hab. Cameroons Mountains, alt. 5000-6000 feet. 
Of this genus, which abounds in tropical Africa, and of which 
one species reaches the Albany district of South Africa, there are 
five Cameroons Mountains species, occurring at elevations between 
4000 and 6000 feet. 
16. CALANTHE CoryMBosa, Lindl. (ante, vi. 129). 
Hab. Fernando Po, alt. 5000 feet. (Fl. Dec.) 
17. Disa ALPINA, H.f., n. sp. Caule gracili, foliis elongato-lanceolatis 
longe acuminatis 3-nerviis, spica densiflora, bracteis subulato-lanceo- 
latis flores subzequantibus, sepalo postico late ovato obtuso calcari 
decurvo zquilongo, petalis late oblique ovatis obtusis, labello minimo 
lineari. 
Hab. Cameroons Mountains, alt. 7000 feet. (Fl. Nov.) 
Herba gracilis, spithamea ad pedalis, glaberrima. Folia "caule paulo 
