ON ROSA SEPTUM. 77 



ginatam vel sublaceram amplectaiite, stamiiiibus 3 filamentis elongatis, 

 autheris flavis, stylis plumosis purpureis. — In coUibus a Peking occa- 

 sum versus sitis, mense Augusto, 1865, raro obvenit cl. Dri. S. W. 

 Williams. (Exsicc. n. 12572.) 



This plant is possibly soboliferous, as I find a scaly shoot, like those 

 of Muhlenbergice, arising above the stout radical fibres. Neither the 

 limits nor station of this genus have hitherto been very satisfactorily 

 settled. To me it appears, on the one hand, closely allied to Tricuspis, 

 Beauv., and, on the other, to Triodia, K. Br., and especially Scolochloa, 

 Link (= Fluminia, Fr.), genera placed widely apart by Nees v. Esen- 

 beck, in the outline of his arrangement given in the second edition of 

 Lindley's ' Natural System of Botany.' The Festuca seroiina, of 

 Linnaeus, seems to have been correctly referred here by Link, a view 

 also taken by the younger Nees, by Parlatore, and, I believe, by General 

 Munro (Linn. Journ. Bot. Vol. VI. p. 41) ; though the description of 

 the genus (identical with that in Nees' " Graminese Africae Austra- 

 lioris "), as having the lower palea 3-nerved, given by this gentleman, 

 in the fullest exposition of his views with which he has yet favoured 

 the public (Harvey, Gen. S. African PI. ed. 2. 449), would technically 

 exclude it. Koch, the elder Nees, Kunth, Grisebach, and Steudel 

 place this species in Molinia ; the affinity of which is surely rather 

 with Glyceria, and the genera or sections into which it has been 

 divided of late years. Molinia squarrosa, Trin., unknown to me, may 

 be an ally of the Chinese plant ; but is described as having 1-3- 

 flowered spikelets. I gathered Diplachne fusca, Beauv., at Amoy, 

 some years ago. 



ON ROSA SEPIUM, Thuill., AND OTHER NEW OR LITTLE- 

 KNOWN FORMS OF BRITISH KOSES. 



By J. G. Baker, F.L.S. 



In this paper I propose to describe in full the typical form of 

 R. sepium, Thuill., mentioned in a note in my monograph (Linn. Journ. 

 Bot. vol. ii. p. 224, and Journ. Bot. Vol. VIII. p. 24), as gathered 

 by myself last year in Surrey, on the southern slope of Hind Head, 

 and also to notice one or two other forms which I have had the op- 

 portunity of seeing since the paper was read. 



