278 “fHE JOURNAL OF BOTANY 
ExpLaNaTION oF PraTe 494. 
. Whole plant of Sagittaria heterophylla var. iscana, with stolons, a small 
sation, reduc about a third. 2. Portion of a n inflorescence, natura 
size. Stamen, salksued Be ut 10 diameters. 4. pase carpels, prea 
about 10 diameters. 5. Stamen of S. sagittifolia, for contrast, enlarged about 
diameters. 6. Carpel of S. sagittifolia, for contrast, enlarged about 
10 diameters. 7. Portion of the — part of an exooptona a and unique leaf 
THE GENUS ROSA in tHE ‘LONDON CATALOGUE,’ gp. 10. 
By W. Barcuay. 
Prruars the Editor of the Journal of Botany will kindly give 
space to a few notes on some of the species of Rosa as given in 
the new edition of the London Catalogue. 
R. hibernica nee and R. involuta Sm. The hybrid motu of 
these two roses seems still doubtful to the ‘authors, as it is m 
n. Stra od 
say, there is no such ‘mark at the kindred hybrid Eglanterta x 
Spinossisima. urely those who ri the latter as a hybrid 
should equally accept the two are er? 
. pomifera J. Herrm. ae vidence re an plant is native 
to England given by Mr. ¥ Gorin: Bot. 1907, 204) gars 2 
very little account in the as “of a plant which 1 has been so | 
in cultivation. 
mollis Sm. var. recondita Puget. If this plant really occurs 
in fifteen counties of Britain, it ought surely to have been given 
s a variety of R. pomifera, in accordance with the views of Conti- 
nental me tee should ant be the best ndees If 
the occurrence of this variety, which is the one nearest to the type 
of H sosedeereg could i ae it would greatly sheen subi the case 
i the a being also native. 
R. omissa Déségl. and its three vars. b, ¢, and d. The variety 
d. peouds rabiginien Lej., which, as Mr. Ley states in 
e could not possibly by mistaken. Its 
sepals are truly sainbets and do ap disarticulate as do those of 
R. omissa Déségl. and its varietie 
With regard to the 2. sca itself and its variety b. resinosozdes 
Crép., the former said to occur in eighteen and the latter in thirty- 
two counties, it is truly strange that — so widely spread a 
never. before to have been recognised by any competent obse 
In 1894, in his paper “Sur la Nécessité d'une Nouvelle et 
graphie des Roses de ]’Angleterre,”’ oe says, p. 10, Up to the 
present this species does not appear to have been established as 
peoorring in the British Isles, where moreover it does not seem 
exis 
As toe. sub-mollis Ley, which is said in the paper to be very 
