l6"4 Mr. Woods oh ilie Brifis/i Species of Rusa. 



in others, though somewhat dift'erent on different parts of the plant, 

 yet on any given part they are nearly similar. Some further obser- 

 vations on this head will be found in the description of the surculi. 

 Some Roses in the place of setae exhibit white hairs, weak, but 

 not very fine : in R. Borreri the peduncle has sometimes weak 

 setie, sometimes these white hairs, and sometimes, though more 

 rarely, a fine pubescence: hairs also occur on the upper side of 

 the axillfE of the foliole, and occasionally also along the channel 

 on the upper side of the petiole in most Roses ; and sometimes the 

 petioles and the nerves on the underside of the leaf are covered 

 rather with hairs than with down ; but from this point the hairi- 

 ness passes insensibly into pubescence, with which it is even in- 

 terchangeable. On the upper side of the leaf likewise a few 

 straggling along the nerves may occasionally be observed in all 

 the smooth-leaved Roses ; the seeds also and the styles are gene- 

 rally hairy or villous. The weak white hairs occur in every part 

 of the plant on which glands or setae are found, being a produc- 

 tion apparently of a similar nature. 



Chaff may be observed occupying the place of hairs at the 

 axillae of the folioles of R. spinosissima and some others of that 

 tribe. I have not observed it elsewhere. 



Pubescence is found on the stems, receptacles, calyces, sti- 

 pulae, and folioles. The presence or absence of hirsuties, whether 

 of coarse or fine hairs, on the petiole and on the veins beneath the 

 leaf, appears to me of considerable importance, and it is observ- 

 able that these always accompany each other. Individual leaves 

 may doubtless be found in which the petiole is downy and the 

 nerve naked, or perhaps sometimes just the reverse; but a more 

 extended examination will assuredly demonstrate their connexion. 

 To the pubescence of the inferior and superior paginae of the leaf 



attention; 



