MR. G. BENTHAM ON ORCHIDEjE. 349 



Gastrodia, E. Br., about seven species from tbe lndo-Australian 

 region, extending to New Zealand, includes Epiplianes, Blume, 

 aud Gamoplexis, Falcon, (whose analysis in tbe Linnean Trans- 

 actions, xx. t. 13, is not quite correct). Yoania, Maxem., is a 

 single Japanese species, unknown to me ; but, from the character 

 given, it must be allied to Epipogum. Epipogum, Grsertn., con- 

 sists of two species, both of them remarkable for the wide area 

 over which tbey are scattered in few individuals, the one in 

 Europe and temperate Asia, the other in tropical Asia, Africa, 

 and Australia ; the latter species constitutes the genera Galera, 

 Blume, Ccratopsis, Lindl., and Podantliera, Wight. 



Subtribe G. Lijiodore.e. — The genera here collected have the 

 more or less incumbent anther and short rostellum of Arethuseoe, 

 but differ considerably in habit. They never form underground 

 tubers ; the erect, simple stems, except in a very few species, bear 

 several leaves ; they are usually tall, with a simple terminal spike 

 or raceme. They are all extratropical, either in the northern 

 hemisphere generally, or limited to extratropical South America. 



Five genera now belong to the subtribe, all well known, and 

 now of undisputed delimitation. Limodorum, as limited by L. C. 

 Bichard to a single Mediterranean species, for the Limodorum of 

 older authors was an amalgamation of dissimilar plants since dis- 

 persed in different genera. Chloraa, Lindl., about eighty extra- 

 tropical South-American and chiefly Chilian species, includes 

 Asarca, Lindl., which it has been vainly attempted to distinguish 

 generically, sometimes by one character, sometimes by another. 

 Bieneria,Reichb. f, a supposed intermediate genus, and Ulantlia 

 Hook., published in Bot. Mag. t. 2956, as a West-Indian plant, 

 but since shown to be a Chilian Chloraa. cultivated in the St. - 

 Vincent botanic garden. Bipinnula, Juss., has two or three 

 extratropical South-American species, only distinguished from 

 Ckloreea by the very remarkable pinnatifid petals. CepJialantJiera, 

 ten northern species from the New or the Old World, amongst 

 which two from North-west America, published as Chlorams, and 

 one from Japan, are occasionally leafless or nearly so. Epipactis, 

 Crantz, ten species, also northern, from the New or the Old 

 World. 



Tribe 4. Ophrtdeje. 



The Ophrydea?, as established by Lindley, form a perfectly 

 distinct tribe, circumscribed by positive characters derived from 



