154 ENGLISH BOTANY. 



Vav. y is a very remarkable plant, of which I have seen no British 

 specimens, but J suppose that it is this to which Dr. Boott refers in 

 the letter quoted above, as in it he says that he inclines to " the 

 idea established by French authors that the true C. fulva, Good- 

 enough, ' Trans. Linn. Soc.,' is a sterile form of C. speirostachya." 

 C. fulva of continental botanists, of which I have Scandinavian speci- 

 mens from Mr. C. Ilartmann, is more ca^spitose than C. fulva, vars. a 

 and 3, with stouter and much rougher stems, broader leaves, more 

 shortly sheathing bracts, and more approximate female spikes, nar- 

 rower, paler, and moi'e orange glumes, more inflated fruit, with a 

 much longer beak, and containing no properly matured nut. It may 

 be a sterile form of C. fulva, as we find sterile forms in several species 

 of Carex, but my own impression is that it is a hybrid between C. 

 fulva and C. flava. 



C. fulva of British authors is liable to be confounded not only with C. 

 distans, but also with small specimens of C. liinervis. From C. binervis 

 it diiFers in being less casspitose, with shorter, narrower, and less rigid 

 leaves, in having the male spike more acute, the female spikes shorter, 

 more remote, and with the fruit more spreading, the glumes gradually 

 tajiering and not suddenly cuspidate, the fruit with a narrower beak, 

 and the marginal ribs not very much stronger than the others. The 

 lobe which termmates the sheath of the leaf on the side opposite the 

 lamina is considerably longer and much less truncate than in C. 

 binervis. 



In habit it is nearer to C. distans, but the male spike is more 

 pointed, the female spikes broader in the middle, with the fruit much 

 moi-e spreading, the glumes gradually pointed and not rather abruptly 

 cuspidate or nuxcronate, the fruit rather more inflated, more regularly 

 oval and with a larger beak, and often without pellucid punctures, 

 the nut smoother and wider towards the apex. 



From C. punctata it differs in its less casspitose habit, its blunter 

 male spike, more ovoid female spikes, more tapering and darker- 

 coloured glumes, less spreading and less inflated fruit, with much 

 more conspicuous ribs, and a longer and rougher beak, having the 

 teeth edged with a white membrane. 



Tawny Sedge. 

 French, Carcx fauve. German, HornschricV s Segge. 



SPECIES LVL— CAREX EXTENSA. Good. 



Plate MDCLXXV. 



Reich. Ic. Fl. Germ, et Helv. Vol. VIII. Tab. CCLXXrV^. 

 JDillot, Fl. Gall, et Germ. Exsicc. No.-3257. 



Rootstock densely cajspitose, without stolons. Stem ascending or 

 curved, slender, flexuous, wiry but rather weak, obscurely trigonous, 

 smooth throughout, leafy nearly to the middle. Leaves nearly equal- 



