371 
ON A NEW CHINESE ORCHID. 
By H. F. Hance, Pu.D., ETO. 
YW Peristylus Sampson, n. sp. ; tuberidiis oblongis, caule subpedali basi 
aphyllo vaginato medio folia 3-4 ovato-elliptica acutiuscula basi vagi- 
nantia gerente, squama unica bracteis conformi paulo infra spicam sita, 
spica 13-23-pollicari spirali sublaxiflora, bracteis lanceolatis acuminatis 
bar cequilongis, floribus parvis albidis, sepalis conniventibus obtusis - 
postico petalis obtusis margine inferiore lobulo auctis latiore lateralibus 
lis æquilatis, labello etubereulato trifido lobis oblongis obtusis laterali- 
bus abbreviatis angustis recurvis intermedio iis triplo latiore ac duplo 
longiore, caleare minuto viridulo scrotiformi truncato, antherarum loculis 
parallelis, rostello trilobo lobo medio minore, gynostemio utrinque sta- 
minodio magno glanduloso auriculato. 
Ad cacumina herbida montium Pak-wan, supra Cantonem, ineunte 
Maio 1868, detexit cl. Sampson (Exsice. n. 14493 
Closely allied to P. spiralis, A. Rich., but differs from that, and 
apparently from every described species, in the form of the labellum. 
In general aspect it has much resemblance to the Hongkong P. chlo- 
ranthus, Lindl. (— Habenaria lacertifera, Benth.), which, however, has 
narrower and radical leaves, the stem clothed with long scales, linear 
and nearly equal labellum-lobes, and an acutish spur. 
I merely follow the usually accepted nomenclature in referring this 
Orchid to Peristylus, with the Asiatic species of which it is undoubtedly 
congenerie; but I would willingly place it in some larger group, did I 
know how these can be safely and naturally limited. Blume (Mus. 
Lugd.-Bat. ii. 188) has endeavoured to define the genus more strictly, 
and refers to it all Lindley's Celoglossa ; whilst Mr. Bentham, in the 
* Flora Hongkongensis,’ has reduced Platanthera, Peristylus, and Cælo- 
glossum to Habenaria, I dare say with very good reason. So far as 
P. viridis is concerned, he had been anticipated by the younger Esen- 
beck, in the Genera Pl. Florz Germaniez. Cæloglossum is admitted 
by Prof. Reichenbach fil., but whether he recognizes Peristylus at all, 
and if so, within what limits, I cannot say. The two British species 
referred by Lindley, Bertoloni, Ledebour, etc., to Peristylus, have been 
thus distributed by modern botanists. 
P. atBipus.—Gymaadenia, Nees jun., Fries, Nyman, VAL 
2 B 
