SOMP] ROSES FlUni D()KSETSITII{1': U) 



and every specimen in tlie British Musevun (Hritisli collection and 

 Desegiise collection) and Kew herbaria, 1 have not yet come across 

 H. arvensis without any pinnae at all, in spite of the usual cleHnition 

 in books "sepals usually quite entire or very slightly pinnate." In 

 H, hihracteata Bastard the lowers are rosy white : a specimen from 

 Anjou, sent under that name by Basiard to Ivew, seems to be 

 li. sj/stt/la pure and simple. 



This is not a shar]dy-defined Yariety, as 1 have come across speci- 

 mens with large leaves and solitary or geminate llovvers,. and others 

 with small leaves and um])ellate or corymbose llowers. 



BOSA ARYENSIS X MICRANTIIA ? 



A bush about 3 ft. high, growing in a hedge with li. arvensis 

 and i2. micrantha, should perhaps be regarded as a hybrid between 

 these two species, 



in habit similar to i^. arvensis^ but stems withcmt ))urplish tinge 

 and leaves extending bcA^ond the solitary tlowers, which arc pure white 

 and measure 40 mm. in diameter. Pedicel thickly beset with stipitate 

 glands, 4 to 5 times as long as the calyx-tube, which is oval and 

 abundantl}^ though less prof uselj^ glandular ; sepals short, pubescent 

 on the inner side, with stipitate glands on the borders and two pinnte 

 on each side, these longer than usual in R. arvensis. Leaves all 

 5-foliolate ; folioles sessile, eglandular beneath but hairy on the 

 mid-rib, which may bear a few prickles, small, \\ to 2 times as long 

 as broad, the terminal 20 to 25 mm. by 10 to 14, acuminate at both 

 ends, with 8 to 12 teeth on each side, each usually bearing one or two 

 glands ; petioles with glands and prickles. Prickles on flowering 

 branches feebly curved, with narrow base. 



I am not aware of such a supposed hybrid having been described 

 before, but Burnat and Gremli (Suppl. Mon. Boses Alpes Marit. p. 82) 

 mention, without giving it a name, a variation of R. arvensis with 

 5-foliolate leaves and glandular calyx-tube, which is perhaps to be 

 regarded in the same light, H. micrantJia being recorded from the 

 same locality (Cosio). R. arvensis., var. setosa Bagnall (Midland 

 Natur. v. 1882, p. 181), from Warwickshire, which I have seen at 

 Kew, is perhaps the same hybrid ("arched scrambling bushes, not at 

 all prostrate "). A R. micrantha from Pljaiiouth (Briggs, 18(j7, 

 Herb. Kew), wdth long smooth jDcdicels, is probably another hybrid 

 form between these two species. 



WolIey-I)od says of the typical R. arvensis that the pedicels 

 " alwaj^s bear sessile or shortly stipitate glands which do not extend 

 to the fruit." I have, however, come across specimens in Surrey 

 with small glands scattered over the whole calyx-tube, as well as 

 others in which the glands are absent, or reduced to a very few, on 

 the pedicel. Christ describes the form repens from Switzerland as 

 with the pedicels smooth or beset with sessile glands. In the South 

 of England and in Belgium the glands are usually distinctly stipitate. 

 A R. arvensis in the Kew Herbarium, from between Ednaston and 

 Hollington, Derbyshire (Exch. Club Rep. 1887, p. 181), named by 

 Crepin R. re^jfans, has doubly serrated folioles, the smaller serrations 

 with 2 or even 3 glands; the tlowers project beyond the leaves. 



