Tas. 8792. 
BULBOPHYLLUM rosustoum. 
Madagascar. 
OrcHIDACEAE. Tribe EPIDENDREAE. 
Butporuytium, Thouars ; Benth, et Hook. f. Gen. Plant. vol. iii. p. 501. 
Bulbophyllum robustum, Rolfe in Bot. Mag. sub t. 8000, sine deseriptione ; 
Kew Bull. 1918, p. 234; affine B. crenulato, Rolfe, sed habitu robus- 
tiore, sepalis lateralibus angustioribus et ovarii carinis integris differt. 
Herba epiphytica. Rhizoma repens, validum, vaginis ovatis ancipitibus acutis 
imbricatis obtecta. Pseuwdobulbi tetragoni, acutanguli, oblongi, 4-6 cm. 
longi, 15-2 em, lati, diphylli. Folia elliptico-oblonga, subobtusa, coriacea, 
12-22 em. longa, 2-3 cm. lata. Scapi suberecti, 15-25 cm. longi, vaginis 
tubuloso-spathaceis obtecti; spica patens vel recurva, oblonga, crassa, 
densiflora, 6-8 em. longa, circiter 1°5 cm. lata; rhachis alveolata ; bracteae 
late ovatae, subobtusae, 8 mm. longae; pedicelli crassissimi, 3 mm. longi. 
Flores parvi, carnosi, 4-5 mm. longi. Sepalwm posticum inflexum, 
ellipticum, obtusum, sepala lateralia connata ; limbus late ovatus, obtusus, 
papillosus, margine crenulatus. Petala triangulari-linearia, obtusa, hyalina, 
1-5 mm. longa. Labellwm orbiculare emarginatum, crassum, 2°5 mm. 
latum, basi subcordatum. Colwmna brevissima; alae subulato-oblongae, 
subacutae, 0°5 mm. Jongae.—R. A. Rours. 
The name Bulbophyllum robustum was originally used 
to designate a species based on specimens preserved in 
the herbarium at Kew which had been collected by the 
Rev. R. Baron in the Central District of Madagascar. 
In 1914, a living plant of a Madagascar Bulbophyllum was 
presented to Kew by Sir F. W. Moore, Royal Botanic 
Garden, Glasnevin, and on flowering proved to be 
identical with the species discovered by Mr. Baron more 
than twenty years earlier. The species belongs to a 
somewhat small group of Bulbophylla in which the rachis 
of the inflorescence is clavately thickened. The shortly 
pedicelled individual flowers are tightly adpressed to the 
rachis, and are considerably dilated laterally, while the 
fleshy lip is immersed in a cavity formed by the united 
lateral sepals, the margins of these being denticulate. 
The nearest ally of B. robustum is B. crenulatum, Rolfe, — 
another Madagascar species, figured at t. 8000 of this — 
Janvary-Marcg, 1919. : : 
