10 A EETISED AREAXGEMENT OF EBITISH EOSES 



Var. Schottiana Ser. (sub JR. caniiia) differs from var. verticill- 

 acantha mainly in being ahnost unarmed, its leaflets also are more 

 strongly biserrate, fruit ovoid and stjdes villous. V.c. 58. 



Var. aspernata (Desegl.). Typicall}^ tliis should have its peduncles 

 and fruit strongly armed with stout acieular setse, many of them 

 eglandular, but many forms with them only glandular-hispid have 

 been placed here for want of a better name. Leaflets of medium 

 size, biserrate, fruit normally ovoid, but in the aberrant forms globose, 

 and styles hispid or subglabrous. V.c. 3, 17 ?, 23, 34 ?, 36, 58 ?. 



Var. latehrosa (Desegl.). Stems with acicles in clusters here and 

 there, leaflets rather small, biserrate, fruit ovoid and styles hispid. 

 It may be a hybrid, though similar acicles appear in varieties of 

 other Groups, the hybrid origin of which has not been suggested. 

 V.c. 1 or 2, 3, 23, 35. 



ii. Secondary Gteoup of E. bloxd.eana. 



Leaflets glabrous, fully glandular-biserrate, often narrow, with 

 subfoliar glands at least on primary nerves, rarely on mid-ribs only, 

 peduncles smooth or glandular-hispid, fruit and styles variable. It is 

 perhaps Avrong to admit specimens without subfoliar glands, but 

 these organs are often so elusive, and frequently appear only on a few 

 leaves, that I have included forms without them on account of their 

 very compound glandular biserration, and their strong resemblance to 

 forms which have them. The Group includes Crepin's Scahraf(B. 



R. BLONDJEANA Kip. Leaflets large, sometimes broad, peduncles 

 glandular-hispid, fruit subgiobose and styles hispid. Karely the 

 fruit is ovoid, and forms exist wdth glabrous or with woolly stvles. 

 V.c. 34, 36, 38, 43, 57, 58, 62 or (Srj, 70, 89 ?, 105. 



Var. vinacea (Baker). Leaflets typically narrow and well spaced 

 on their petioles, peduncles smooth, fruit ovoid or ellipsoid, and 

 styles hispid. Forms without subfoliar glands are frequent, and the 

 position of the variety is doubtful, Baker having flrst credited it with 

 subfoliar glands and afterwards making it a form of var. hiserrata. 

 V.c. 43, 58, 62. 



Var. Beafricis (Burn. & Grem.). Leaflets small, often quite 

 narrowed at each end. Normally very glandular, but British forms 

 have fcAv and inconspicuous subfoliar glands. Fruit ovoid or ellip- 

 soid, styles subglabrous. V.c. 36, 40, 58. 



iii. Secondaet Group of R. dumetoeum. 



This includes all varieties of the Primary Group {R. canina)^ 

 having hairy leaflets, even 'though the hairs are confined to the 

 mid-ribs, but not those with pubescence on the petioles only. In some 

 forms the sepals are spreading, and in one variety they are suberect, 

 but their long peduncles and hispid, not woolly, styles will distinguish 

 them from the CoriifolicB. 



A. Subgroup Dumetorum. 



Peduncles smooth, leaflets simply or biserrate. 



R. DUMETOEUM Thuill. Leaflets hairy on both sides, fruit sub- 

 globose, stvles usually densely hisjnd. V.c. 2 "r', 3, 8 ?, 13, 24, 32, 

 34 ?, 36, 65, 70. 



