Win Goo. 
DENDROBIUM  Darrorstanum. 
Indo-China. 
ORCHIDACEAE. Tribe Ee1IDENDREAE. 
Denprosium, Swartz; Benth. et Hook. f. Gen. Plant. vol. iii. p. 498. 
Dendrobium Dartoisianum, De Wildem. in Gard. Chron, 1906, vol. xxxix. 
p. 380; a D. tortile, Lindl, caule elongato cylindrico, sepalis petalisque 
magis tortilibus et undulatis, labello angustiore et valde convoluto.differt. 
Herba epipbytica. Pseudobulbi aggregati, elongati, cylindrici, 35-75 em. longi, 
foliacei. Folia disticha, oblongo-lance lata, subobtusa, partentia vel 
recurva, 9-10 cm. longa, 2°5-3°5 cm. lata. Rucemi axillares, breves, 
2-4 em. longi, 2-4-flori. Bructeae oblongae, obtusae, convolutae, 6-8 mm. 
longae. Pedicelli graciles, 3-5-4 cm. longi. Flores spec'osi, pallide lei, 
sepalis petalisque apice purpureis, Jabello basi purpureo-lineato. Sepa/u 
patentia, lineari-oblonga, obtusa, irregulariter torta, 3-3°5 cm. longa. 
Labellum integrum late ellipticum, obtusum, basi convolutum, 4 cin. 
longum ; discus velutinus. Mentum obtusum, 3mm. longum. Columnua 
lata, 6 mm. longa.—R. A. Rot¥rs. 
The fine Dendrobium which forms the subject of our 
illustration was discovered in 1905 in Indo-China. The 
precise locality has not so tar been indicated, but it is said 
to occur at about 1,750 feet above sea-level. It was 
introduced to cultivation by Mr. G. Bronckart along with 
another Indo-Chinese species, D. Bronckartii, De Wildem., 
ficured at t. 8252 of this work, which is a native of Annam. 
The nearest ally of D. Dartoisianum is D. tortile, Lindl., a 
native of Chittagong and Burma, figured at t. 4477 of this 
work; the stems of D, Dartoisianum are, however, longer 
and more cylindric than those of D. tortile, the undulate 
sepals and petals are more markedly twisted, the base of 
the lip is narrower and more convolute and the coloration 
of the flowers is different. The plant from which our 
figure has been prepared was purchased for the Kew collection 
in 1906 from Mr. M. Verdonck, Ghent. It has been grown 
and flowered in a tropical house at Kew under the con- 
ditions suitable for the species of the group to which 
D. nobile, Lindl., belongs; during winter it is rested in an 
airy greenhouse. 
January, 1911. 
