22 MK. C. B. CLARKE ON INDIAN SPECIES OF CTPERUS. 



do not like to propose new specific names and give long descrip- 

 tions of these, when I see the considerable variation in length of 

 style which occurs in many fully-known species. 



The style-branches are unusually short and broad, much 

 papillose-flocculose (reminding of Fimlristylis) in the happily- 

 named G. platystylis, E. Br. ; and the style is something 

 similar in G. ceyyptiacus. 



(10) The Nut. 



The form, size, and surface-appearance of the nut are characters 

 of primary importance. 



The first distinction in form is between the trigonous and flat- 

 tened nut, according as the style is trifid or bifid. The character 

 from the style has been generally preferred, being more definite ; 

 for in Eucyperus the face of the nut is frequently flattened against 

 the rhachilla, whilst the nut is unequally trigonous, the dorsal 

 angle being but slightly developed ; and in Juncellus the nut 

 is often convex on the back, so that the distinction founded on 

 the nut, though clearly enough visible in most cases, fades away 

 in some instances. 



G. stoloniferus, Eetz., is placed by Boeckeler in Juncellus ; but 

 the nut is not less trigonous than it is in G. arenarms, G. AucJieri, 

 and others of the Conglomerati, which he places in Eucyperus. 

 (The var. jS and y in Boeckeler do not (mihi) belong.) I think the 

 species altogether a Eucyperus. 



G.pycjtrHBus, Eottb., contra, is placed by Boeckeler in Eucyperus, 

 as having a "triangular" nut: this I do not find so at all 

 (fig. 10). I agree with Kunth and Bentham that the species is 

 a Juncellus. 



In the cases of G. alopeeuroides, Eottb., and G. inundatus, 

 Eoxb. (which I have considered separately below), the form 

 of the nut is definite in each species (or var., as Boeckeler con- 

 siders). 



The flattened nut may have an edge (Pycreus) or a face (Junr 

 ccllus) next the rhachilla; and this distinction is very strong. 

 Juncellus is much more clearly separate from Pycreus than from 

 Eucyperus. 



The shape of the nut, as narrow-oblong, broad-obovoid, trun- 

 cate, shortly rostrate, &c, affords an excellent specific character, 

 constant (speaking in a broad way) in every species. 



In most of the reallv natural sections a similarity of nut is 



