276 MR. H. N. RIDLEY—AN ENUMERATION OF 
mi 
BULBOPHYLLUM MONTIGENUM, Ridl. in Trans. Linn. Koc. 
ser. II., Bot. iv. (1894) p. 235. 
Kinabalu, ad 6000 ped. alt. 
B. BREVIFLORUM, Züdl. l. c. p. 236. 
Kinabalu, ad 6000 ped. alt. 
B. § INTERVALLATZ, sect. nov. 
Rhizoma sspe crassum, pseudobulbis conicis majusculis vel 
subnullis. Folia coriacea, sepe magna. Scapus rigidus elatus, 
majore parte nudus, apice racemoso incrassato, bracteis approxi- 
matis appressis ovatis. Racemus multi sepe plurimiflorus, flores 
majusculi singulatim intervallis longis expansi. Sepala lanceolata 
acuminata vel caudata. Petala perparva. Labellum majusculum. 
Columne stelidia brevia. 
Species adhuc note tres, in arboribus sylvarum Malayensium, 
crescentes. 
This is a very distinct section of Bulbophyllum, remarkable for 
possessing a tall stiff scape ending in a many-flowered raceme, 
the flowers of which are expanded one by one at long intervals, 
the rachis slowly elongating as they are expanded, so that, 
though in one species as many as eighty flowers are eventually 
borne on the raceme, no two are open at one time, and many 
weeks elapse between the opening of the first and last flowers. 
A similar method of flowering occurs in many of the Sarcochili, 
as in the section Cucullati (e. g. S. Arachnites, Reichb. f., and 
S. notabilis, Hook. f.), and also in Oncidium Papilio, Lindl. The 
flowers are rather fugacious, lasting for little more than a day. 
In two of the species they are widely expanded when open, the 
other is (usually, at least) cleistogamous and does not open at 
all  Thelip is channelled, with the channel filled with nectar ; 
it does not move freely on the foot of the column as is usual in 
the rest of the genus, but is quite stiff and porrect. 
Though two of the species are not, so far as I know, natives of 
Borneo, I have thought it best to describe all together. 
B. TARDEFLORENS, sp. nov. 
hizoma crassum lignosum, radicibus longis tectum, pseudo- 
bulbis subnullis. Folium ovatum, basi attenuatum, apice obtusum 
crassum coriaceum atro-viride, 9 pollices longum, 3 pollices latum. 
Scapus folio approximatus, gracilis, teres rigidus erectus ultra- 
pedalis. Racemus crassior cylindricus, braetee amplectentes 
ovate. Flores plurimi, magni. Sepalum posticum lanceolatum 
