333 SHORT NOTES AND QUERIES. 



above-named points of difFerence would seem to imply, and I am not 

 disposed to consider them the same thin";; still I may be wrong in this 

 opinion, as the specimens before me of ScJilicknmi, are weak and poor, and 

 so the comparison has not been altogether a satisfactory one. 



From R. 7-Jiamiufolins, W. and N., it differs in havina; the barren stem 

 less angular, leaves often convex above, with more glossy surface, both 

 stem and panicle less prickly, especially the branches of the latter, some 

 of these being without a single prickle throughout their whole length ; 

 also in having the panicle considerably more lax with the flowers at a 

 greater distance from the rachis, especially near the top. The narrower 

 base of the terminal leaflet of the leaves of the barren stem affords an 

 additional mark for distinguishing it from the very broad cordate-leaved 

 form of R. rhnmnifolins, the R. cordifoUus of W. and N. 



I have never seen specimens, either fresh or dried, of R. imbricatus, 

 Hort., so have no means of comparing it and R. r-amosus, but judging 

 from Professor Babington's description of it in ' Britisli Riibi' it must be 

 very near the latter, although with the leaves imbricate, and tbose of the 

 barren stem " opaque and pilose " above, it must differ somewhat from 

 it. R. ramosiis generally grows either in open or partially shaded spots in 

 woods, as well as in thickets on their borders, and is much more of a 

 woodland plant than is R. rhamnifolius. 



In the tract of country watered by the Plyra I have seen it between 

 Stadiscoml)e and Plymstock ; at Derraford, Leigham, in the woods of the 

 Plym valley, and other places in the parish of Egg Buckland ; in a lane 

 between Elfordleigh and Newnhara Park ; near Bickleigh, etc. 



In that drained by the Tavy : — between Knackersknowle aiul Tainerton 

 Foliott ; at Warleigh ; Bhixton ; near Maristowe ; Denliam Bridge; 

 between Horrabridge and Tavistock, etc. 



In that watered by the Yealm and Erme : — at Brixton Tor; Ivy- 

 bridge, and in a moist bushy flat below Pen Beacon, on the southern 

 border of Dartmoor. I have also seen it in a wood by the Tamar, close 

 to Newbridge, on the Devon side of that river. In Cornwall I have met 

 with it between Pillaton Village and Clapper Bridge, on the Lynlier; as 

 well as near Antony, on the road to Sheviocke ; also in this county, at a 

 considerable distan(!e from Plymouth, between Looe and Morval ; between 

 the former place and Menheniot; and near Probus, only a few miles from 

 Truro. 



SHORT NOTES AND QUERIES. 



Ambrosia Peruviana, JFMd.— Vvot Dyer's note (Journ. Bot. IX. 

 53) on this plant reminds me that I have had for some time in my her- 

 barium a specimen of Ambrosia marWuna, L., a native of South Europe 

 and Asia Minor, which was found growing in abundance in 1865 in a 

 cornfield at Ham, near Pichmond, Surrey. I have placed the specimen 

 in the British Museum herbarium. Last year I received J. irifida, L., a 

 North American species, from the neighbourhood of Manchester. — James 

 Britten. 



Thlaspi alpestre in the Lake District. — The Pev. Augustin 

 Ley supplies my want (p. 262) of an unexceptionable station for this 



