THE OKNUS ROSA 295 



(11) R. coriifolia var. Lintoui X R, lutetiana. Fig. 25, 

 Plate XXL 

 This forms a stout luxuriant bush. In its flowers the 

 colour of the corolla seems to be a delicate pink intermediate 

 between the white of /«/(f//rt;;/rt; and the clear rose ol Li/Uoni ; 

 similarly, too, the shape of the petals strikes the mean, for 

 they are neither so broad as those of litfetiana nor so narrow 

 as in Liiitoni. In the calyx, the sepals are more strongly 

 glandular and pinnate than those of lutetiana and to a great 

 extent approach Lintoui. The latter form has a broad 

 woolly head of stigmas sessile on the disk; this has a much 

 narrower head, slightly larger, subspherical, far from sessile, 

 and weakly hispid ; in lutetiana, as we know, the protruding 

 stigma head is nearly glabrous. The lengths of the peduncles 

 are intermediate. The bracts, stipules and prickles, in colour, 

 shape and other minor characters, are not so far removed from 

 Lintoui. 



The leaves are dark green and keeled and remind one of 

 lutetiana; still, the teeth, whilst not so marked, bear the 

 three or four glandular denticles of Lintoui. Influenced by 

 the same form they exhibit beneath a feeble hairiness on the 

 primary veins, but only rarely do glands appear; when they 

 do, they resemble the reddish ones of Lintoui. 



On July 2ist. 1919, the sepals of the hybrid were horizontal, 

 those of the adjacent Lintoui half erect, and those of lutetiana 

 reflexed. At that time Lintoui fruits were the largest by far, 

 and, as a matter of fact, both the hybrid and lutetiana were 

 still flowering. 



To sum up, as a bush and broadly speaking, it is liker 

 lutetiana and was at first regarded as a phase of that 

 microgene ; in its minuter details it follows Lintoui. 



I call it Rosa hybrid promissa. 



For all the figures, except those in the text, and Plate VIII., 

 fig. B, and Plate XV., I am indebted to Miss Monica M. Hull. 



Armstrong College, 



March 2^th, ig20. 



