170 : MR. H. N. RIDLEY ON PLANTS 
DENDROBIUM ($ PEDILONUM) XANTHELLUM, Ridl., sp. nov. 
Caulis 40 cm. longus, 2 mm. crassus, superne flexuosus, internodiis 1 cm. longis. 
Folia desunt. Racemus subterminalis, gracilis, 3:2 em. longus, circiter 15-florus. 
Bractee ovate, 1 mm. longs. Flores parvuli, aurantiaci, 12 cm. longi, pedicellis 
1:3 em. longis gracilibus. Sepalum posticum lanceolatum, acutum, 6 mm. longum, 
lateralia latiora, 2 mm. lata; mentum conicum, crassiusculum, obtusum, 9 mm. 
longum. Petala lanceolata, acuta, sepalo postico similia. Labellum sepalis brevius, 
ungue lineari, apice angusto lanceolato acuto integro. Columna crassa, fovea 
stigmatica ampla rhomboidea, stelidiis inconspicuis parvis, margine clinandrii alto. 
 Anthera apice rotundata nec retusa, minutissime papillosa. RosteZlum bidentatum. 
Camp VI a, 3100 ft. 
Near Dendrobium inamenum, Krauzlin, of British New Guinea, but with a linear 
acute, not cucullate entire lip. 
DENDROBIUM (8 PEDILONUM) RHODOBOTRYS, Ridl., sp. nov. 
Caules alti, 3 mm. crassi. Folia lanceolata vel ovato-lanceolata, coriacea, acuta, basi 
rotundata, 8 em. longa, 2-5 cm. lata, vaginis 2 cm. longis, ore rotundo. Racemus 
terminalis, densus, multiflorus, 2 cm. longus. Bractee oblonge, lanceolate, 
obtuse, 5 mm. longee, 2 mm. late, rosea. Flores circiter 24, subcapitatim con- 
gest». Pedicelli graciles, 1:5 cm. longi. Sepalwm posticum oblongum, obtusum, 
4 mm. longum, 2 mm. latüm, lateralia similia, apice rotundata; mentum breve, 
crassum, obtusum, rectum, 5 mm. longum. Petala latiora, ovato-oblonga, obtusa, 
omnia rosea. Labellum 1'2 cm. longum, ungue brevi lineari, callo transverso 
laminiformi ad apicem emarginato, lamina aurantiaca elongato-triangulari integra 
truncata 8 mm. longa apice 5 mm. lata, marginibus ad apicem involutis. Columna 
aurantiaca, ad apicem pedis angustata, stelidiis crassis oblongis obtusis, rostello 
lato recto, filamento breviusculo. 
Camps VI and VI c, 3900 and 5500 ft., and VII to VIII, up to 4900 ft. 
Allied to D. bracteosum, Reichb. fil., but the flowers are much smaller, the lip-apex 
broad, minutely denticulate, with the callus as a low transverse emarginate bar between 
the foot and blade of the lip. A small piece of a plant with flowers little more than 
1 em. long, collected between Camps III and VIII, has exactly the same floral structure, 
and is doubtless the same plant with smaller leaves and flowers. 
DENDROBIUM MITRIFERUM, J. J. Sm. in Bull. Dep. Agr. Ind. Néerl. xxxix. (1910) 10, 
and in Nova Guinea, vii. p. xciv c. 
Camp VI c, 4900 ft. 
Distrib. New Guinea. 
The flowers seem to be pink, except the lip, which is Pu ds white with a yellow 
tip; the lip is remarkably short in proportion to the sepals. Smith gives the colour of 
the flowers as yellow with orange and orange-red. The plant, however, seems identical 
with the figure and divi. 
