168 MR. H. N. RIDLEY ON PLANTS 
pes, marginibus alatis, stelidiis magnis oblongis truncatis, filamento gracili longiore. 
Anthera campanulata. Capsula ellipsoidea, 1:5 cm. longa, pedicello 2 cm. longo. 
Between Camps III and VIII, 2500 to 4900 ft. 
Allied to D. piestocaulon, Schlechter, but with a very different and coriaceous lip, 
practically four-lobed, with a very deep and wide indentation between the two acuminate 
points of the middle lobe. The flowers are very thin in texture, and appear to have 
been greenish in colour. | 
DENDROBIUM (0 GRASTIDIUM) PLANICAULE, Ridl., sp. nov. 
Caules validi, complanati, 30 cm. longi vel longiores. Folia disticha, oblongo- 
linearia, coriacea, apice inzequaliter biloba lobis rotundatis, 4 cm. longa, 1 cm. lata, 
nervis tribus in dorso conspicuis, vaginis complanatis costatis 1 cm. longis, 4 mm. 
latis, ore integro. Flos solitarius, e vagina extrusus, bracteis parvis lanceolatis 
obtusis. Pedicellus cum ovario 5 mm. longus. Sepalum posticum lanceolatum, 
obtusum, lateralia latiora, ovata, lanceolata, acuta, carnosa (sicca atra), 10 mm. 
longa, 4 mm. lata, mento rotundato obtuso. Petala latiora, ovata, subacuta, 9 mm. 
longa, 4 mm. lata. Labellum linguzeforme, ovatum, lanceolatum, brevius, obtusum, 
6 mm. longum, lateribus sursum curvis, apice decurvo magis carnoso. Columna 
brevis, ad pedem breviorem curvata, haud alata, margine clinandrii vix elevato. 
Anthera conica, in apice processu oblongo rotundato complanato munita.  Pollinia 
2, minima, hemispheerica. 
Camps VI d and VI c, 3900 and 5500 ft. 
Allied to D. erectifolium, J. J. Sm., but with smaller leaves, flattened sheaths, and an 
entire lip. The flowers are solitary, fleshy, and dry black. 
DENDROBIUM ($ REVOLUTA) DISSITIFOLIUM, Ridl., sp. nov. 
Caulis validus, ultra 40 cm. altus, 5 mm. crassus. Folia lanceolata, acuminata, 
tenuiter coriacea, costata, 10 mm. longa, l:5 em. lata, apice valde insqualiter 
biloba, vaginis 2 cm. longis costatis, ore integro. Racemus e basi vaginæ extrusus, 
gracilis, 5 cm. longus. Flores 9, mediocres. Sepalum posticum ovatum, 6 mm. 
longum, 4 mm. latum, lateralia late triangularia, flava, 6 mm. longa, æquilata, 
mento brevissimo obtuso. Petala tenuiora, oblonga, obtusa, apice rotundata. 
Labellum obcuneatum, magnum, 6 mm. longum, 5 mm. latum, lobis lateralibus 
lanceolatis acutis, lobo medio obovato lato equilongo minute denticulato, carinis 
2 crassis e basi in discum procurrentibus. Columna crassa, stelidiis brevibus 
erectis, clinandrio vix profundo; pollinia 2. 
Camp VI c, 5500 ft. 
The species seems to be most suitably placed among the Revoluta, but it is very 
distinet from any species of this section. 
DENDROBIUM ($ PEDILONUM) srrictum, Ridl., sp. nov. 
Rhizoma lignosum, radicibus longis validis, caulibus erectis ad 65 cm. altis 3 mm. 
crassis rigidis. Folia anguste lanceolata, acuta, stricta, carinata, 5 em. longa, 
