52 MR. G. BENTHAM ON GRAMINE XZ. 
sometimes within them two or three very minute scales, which 
may possibly be rudimentary staminodia. Doell has also pro- 
posed to separate generically, under the name of Eremites, a 
Brazilian plant which, from the single spike I have seen as well 
as from his deseription and figure, appears to be no more than 
a starved state of some true Pariana. 
2. Corx, Linn. (Lithagrostis, Gertn.), contains three or four 
East-Indian species closely allied to each other, one of which, 
the common “Job's tears," is widely spread over the warmer 
regions both of the New and the Old World, but in many places 
of comparatively modern introduetion. The hard covering of the 
fruit here consists of the sheath of a subtending bract, the 
withered glumes as well as the internode of the rhachis remaining 
entirely enclosed within it. 
3. Porvroca, Br. (Cyathorhachis, Nees), three or four tropical 
Asiatic species in which the stony case of the fruit is formed by 
the outer empty glume, which is completely closed over the 
remainder of the spikelet as well as the internode to which it is 
attached. The species are :—(1) P. bracteata, Br. (Coix heteroclita, 
Roxb.) spicis maseulis terminalibus ramosis, inferioribus an- 
drogynis v. foemineis plerisque simplicibus, glumis exaristatis : 
(2) P. Wallichiana (Cyathorhachis Wallichiana, Nees), spicis 
masculis terminalibus ramosis, inferioribus androgynis v. feemineis 
plerisque simplicibus, spicularum mascularum gluma exteriore 
longe tenuiterque aristata: (3) JP. macrophylla, sp. n., spicis 
longis (omnibus?) androgynis simplicibus, glumis acuminatis 
exaristatis ; folia adsunt 2-pedalia, 2 poll. lata, spice 4-6-polli- 
cares: from the Louisiade Archipelago ( Mac Gillivray). 
4. CuroNACHNE, Br., contains three species from tropical Asia 
or Australia, in which the hardened fruit-case is formed, as in 
Polytoca, of the outer empty glume, but the internode of the 
rhachis, instead of being completely enclosed within it, is em- 
braced only by its thickened margins, and is seen lying as it 
were in a groove of the fruit-case. 
5. ScLERACHNE, Br., is a single Javan species, with the 
fruit nearly of Chionachne, but with a different habit, and the 
bardened outer glume is produced. beyond the fruit into an open 
membranous appendage. 
6. Tripsacum, Linn., consists of two or three American species 
with the terminal male inflorescence usually more branched than 
in the preceding Asiatic genera, approaching that of Euchlana 
