42 REVISION OF SECTION TOMENTOSA OF THE GENUS ROSA. 
dentate, is opposed to bis text, where he says, " leaves doubly den- 
tate." 
The herbarium of Smith presenting the same confusion as subse- 
quent describers of R. tomentosa, we must examine the descriptions of 
Fl. Brit., without taking the subsequent errors into account, for all, 
or at least the majority of botanists describe this plant in accordance 
with the characters given in 1800, and which have since been con- 
firmed by De Candolle in 1805, Gmelin in 1806, Persoon in 1807, 
Trattinick in 1823, Eeichenbach in 1830, and Boreau in 1849. 
If R. tomentosa is as. variable as R. canina, as some maintain, 
who object to raise to the position of species those pretended forms, 
which they hold must in time be reduced to their original species, 
then it is surprising that these pretended forms have retained their 
peculiarities for more than half a century, as must be obvious to 
every one who observes without preconceived notions. We be- 
lieve that every constant variety among plants should be considered a 
species. 
If further study and deeper research prove that the R. tomentosa of 
the French Floras is not that of Smith, I willingly accept Mr. Baker's 
name (R. Dilleniana, Baker in litt.) for our species, but, in the mean- 
time, I must adhere to Smith's name. 
Mr. Baker writes that he refers to our R. toweniosa, Buddie's spe- 
cimen in Herb. Sloane, cxxvi. p. 22, named E. sylvestris, folio molliter 
hirsuto, fructu rotundo glabro, calyce et pedunculo hispidis, Ray, 
Synops. ed. iii. p 478. Its round fruit cannot belong to this species, 
the fruit of which is oval. Smith, with good reason, refers the species 
in Bay to R. Skerardi, Da v. 
Mr. Baker writes me that R. heter ophylla, Woods, 1. c. p. 195, and 
Herb. u. 34 and 35, seems to him a luxuriant state of R. tomentosa, 
and that R. pulckella, Woods, I.e. p. 196, and Herb. n. 36, is a vari- 
able mountain form of the same species. 
10. R. cinerascens, Dumort. Fl. Belg. p. 93. 
W r ood 
Soc. xii. p. 194, and Herb. n. 31 and 33; Engl. Bot. t. 1896 (teste 
Baker). 
Shrub, with the bark of the young branches purple; prickles thin, 
sparse, dilated at the base, straight, unequal, often in pairs below the 
petioles ; petioles toinentose, glaudulose, prickly below ; 5-7 leaflets, 
