17 
explained by our having examined different sides of the burn ; the left 
bank being that on which fennica grows most plentifully. It here 
occurs freely intermixed with Pyrus Aucuparia, which favours the sug- 
gestion offered by Dr. Boswell- Syme as to the hybrid nature of this 
tree.” — J. F. Duthie, Hay, 1875. 
Pyrus pinnatifida (Angl. plur.) “ West Dale Hall, Cumberland. 
(Planted.) August 31st, 1871.” — Atjgtjstin Ley. P. semipinnata, 
Both. E. B., ed. iii. — J. T. Boswell. 
On the forms ( subspecies or hybrids ?) of Pyrus Aria , Hook. — Since 
1864, in which year I wrote the description of the subspecies of 
Pyrus Aria for the 3rd ed. of “ Engl. Bot.,” as having had a special 
liking for the group I have endeavoured to obtain as much informa- 
tion on the subject as I could from personal examination of both 
living and dried specimens, foreign and British, and also by conferring 
personally and by letter with those able to afford information on the 
subject. The result has been that after much vacillation of opinion 
I have at last, as I think, arrived at some more satisfactory conclusion, 
at least as regards certain members of the group. I am very glad to 
find that at least on one point my opinion is strengthened by a most 
interesting set of Continental specimens of the Sorbus group sent me 
this spring by Mr. H. C. Watson who received them from Professor 
Reichenbach, fil. Of the first form, Pyrus eu-aria , 1 E.B.’, ed. iii., 
which I have called Pyrus eu-aria , and which is P. Aria of Babington’s 
“ Manual ” and the “ London Catalogue,” I have little to remark. Its 
leaves vary from roundish-oval to oblong-elliptical, are firm, with 9 
to 14 veins on each side, which stand out very prominently beneath, 
especially when the leaves are old, when they become somewhat 
parchment-like in texture, and remain permanently covered with very 
close pure white arachnoid felt. The margins of the leaves are 
serrate or crenate- serrate, and frequently slightly lobed, the terminal 
tooth of the lobe into which the vein runs not greatly exceeding the 
others in size and sharpness. The third vein from the base usually 
being the first that runs into anything that can properly be called a 
lobe, and the lobes deepest about one fourth from the apex of the leaf. 
The flowers are comparatively large, % to f inch across, and have 
rather an unpleasant odour ; the young leaves retain traces of an 
arachnoid tomentum, especially on the veins, until the flowers are 
fully expanded. The fruit is about half an inch in diameter and 
bright scarlet. It is a common plant in the south of England, 
especially in chalk districts, and grows to a tree of considerable size 
(10 to 20 feet). 
2. Pyrus rupicola , E. B., ed. iii. This differs from Pyrus eu-aria 
B 
