74 THE JOURNAL OF BOTANY 
nearer to jfissus than to plicatus, and that (contrary to p. 118 of 
- R. G.) it has narrower leaflets and smaller flowers than 
plicatus; while ‘acuto vel acuminato’ ems, to say the least, a 
very misleading description of the terminal leaflet, which is so very 
marked an liar.”’ 
Rogersii is one of the most marked British brambles, and 
no specimens of R. ammobius are accessible, I think it advisable to 
give the latest deseriptions of both (Focke, 1902, and Rogers, 1900). 
R. ammobius :— Barren stems roundish and with slender prickles 
at the base, otherwise as in R. plicatus, but pale-green, often rather 
glaucous; prickles slightly recurved from a broad base, usually 
somewhat weaker than in R. plicatus. Leaves 5-nate; a few often 
6-nate or 7-nate through division of the terminal leaflet. Petiole 
channelled on the upper side below the middle, with strong prickles. 
Ovate-acumi 
chiefly falcate prk. on rach. and ped., racemose or su se, 
short and truncate at first, often prolonged with distant alternate 
: later and racemose branches below. Stam. slightly exceeding 
those of R. suberectus in outline, thoug they are usually narrower, 
longer pointed, and far more hairy and greyish. Pet. white or 
pinkish, obovate or oval, of medium size.’’ 
. IntEGRIBASIS P, J, Mill. is here ranked as a subspecies of 
R. nitidus. 
R. orrnoctapos A. Ley (1896), placed by Rogers among the 
Vestiti, is referred to Focke’s subsection Sub-Sprengeliani, with the 
new hame fi. euchloos; as there is a previous R. orthoclados Boulay, 
Ronces Vosges (1869). 
