Tas. 8109. 
VANDA Warsont. 
Annam. 
ORcHIDACERX. ‘Tribe Vanpen. 
Vanpa, R. Br.; Benth, et Hook. f. Gen. Plant. vol. iii. p. 578, 
Vanda Watsoni, Rolfe in Gard. Chron. 1905, vol. i. pp. 82, 123, fig. 52; 
Orch. Rev. 1905, p. 67; aff. V. kimballiane, Reichb. f., a qua differt 
labello concavo fimbriato albo, basi saccato nec calcarato. 
Herba epiphytica, gracilis, 1-14 ped. alta. Folia subteretia, acnta, gracilia, 
supra leviter canaliculata, 6-14 poll. longa, 2 lin. lata, viridia; vaginee 
membranaces, brunneo-maculate. Scapt suberecti, graciler, 3-1 ped. 
alti, 10-12-flori. Bractex ovato-oblongse, obtuse, 2 lin. longe. Flores 
albi; crista flava, purpureo-maculata. Sepala obovato-spathulata, 
obtusa, 9-10 lin. longa; lateralia basi obliqua. Petala obovato-spathu- 
lata, obtusa, 9 lin. longa, basi deflexa et torta. Zabellwm 3-lobum, 8 lin. 
longum ; loli laterales incurvi, carnosi, truncati, margines dentibus 
acutis binis instructi; lobus intermedius cordato-ellipticus, obtusus, con- 
cavus, circa 6 lin. latus, margines fimbriati et basi incurvi; saccus 
obtusus, 1} lin. latus, 2 lin. altus, intus flavus, brunneo-maculatus ; 
callus erectus, 3-lobus. Columna clavata, 3 lin. longa, pede callo 
truncato vel obscure 3-lobo instructo. 
Vanda Watsoni, Rolfe, is a distinct and attractive 
species, which was discovered in the interior of Annam 
by Mr. W. Micholitz, a collector for Messrs. Sander & 
Sons, by whom it was introduced to cultivation, and at 
whose request it was dedicated to Mr. W. Watson, Curator 
of the Royal Botanic Gardens, Kew. It flowered at the 
Royal Botanic Gardens, Glasnevin, early in 1905. It is 
the third member of a curious little group, characterized 
by having narrow or acute leaves and racemes of moderate- 
sized flowers, all of which have now been figured in this 
work. The two others are V. kimballiana, Reichb. f. 
(t. 7112) and V. amesiana, Reichb. f. (t. 7139), both 
natives of Upper Burma. A fourth species with terete 
leaves has also been figured, namely, JV. teres, Lindl. 
(t. 4114), but that has far larger flowers, which are 
markedly different in structure. 
The plate was prepared in February last from materials 
furnished by Messrs. Sander, with the help of a living 
plant in the Kew collection which had previously been 
received from them. It flowers freely in winter under 
tropical treatment. 
DeEceMBER Ist, 1906. 
