﻿40 



after that as a var. of R. leucostachys Schleich., though, I regret to 

 say, I have not been able to secure Mr. Marshall's agreement with 

 such an arrangement. 



A further study of the living bushes last summer has convinced 

 me that we have a well-marked var. of the true R. Barren Bell.-Salt. 

 in the form described and named dentatifolius by the late Mr. Briggs 

 in Fl. Plym. p. 121. I have a beautiful series of specimens collected 

 by him from 15 different localities (14 Devon and 1 E. Cornwall), 

 and I know it, from my own observation, to be a locally abundant 

 and constant form over the whole country from Plymouth and 

 Launceston, in the west, to Okehampton and Haldon Hill near 

 Exeter, to the north and east ; the typical plant being thus far 

 unknown in the province. I add a fresh description, as that in Fl. 

 l'i :i i)K was written to differentiate it from the strong state of R. 

 Sprenqelii, formerly miscalled Borreri, instead of from Dr. Salter's 

 plant (v. Jow n. Bot. 1892, p. 271) :— 



Var. dentatifolius Briggs. St. comparatively destitute of stalked 



■ . " ■ ' . ■: ■ ; . >• ■ - - 



I ! • ' ■ ■ 



more numerous acick-s and stalked glands. A very conspicuous 

 bramble, growing in large clumps in heathy places and on roadside 

 banks, with long stout quite prostrate st., and crowded 1. of 

 curiously narrow incurved yellowish Its. 



My description of 22. radula Weihe in my "Essay" {Journ. Bot. 

 1892, p. 299) must be understood in an aggregate sense, — exclusive 

 of course, of the two varieties there described separately under the 

 names Bloxamianus and sertiflorus. It now seems clear to me that 

 this aggregate description really covers three well-marked forms, 

 which it will be convenient to distinguish in future as varieties, as 

 follows : — 



a. Typical radula. R. melanoxylon Blox. St.-pnckles compara- 

 tively few, equal and confined to the angles; the armature on the 

 faces of st. consisting of short subeqttal acicles, bristles, and stalked 

 glands. Lts. unevenly sharply serrate ; term, broadly ovate and 

 very gradually acuminate. Pan. rather pyramidal, with crowded 

 branches above, lax below; its strong prickles long, subulate, declining. 

 I have seen this (the typical continental plant) in considerable 

 quantity in Yorks., and as far south as Berks. I have also received 

 it from Scotland. 



b. echinatoides, n. var. St.-prickles many, more unequal, and not 



■ '" ■ ; ' i >;;■. 



or recurved. Pan. hardly differing from the type in outline (except 

 perhaps in being usually narrower and laxer), but far more prickly, 



... ■ < . ' ' ■ ■ ,',//■■..'■■ 



ones. St. and pan.-rachis dark red in exposure. Approaches R. 

 echinatus Lindl., R. pallidus Bab. (non W. & N.), and the more 

 glandular forms of R. anglosaxonicus Gelert. I believe general in 

 the north. Especially abundant in Yorks. Surrey. 



