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