284 EEPOET OF THE BOTANICAL EXCHANGE CLUB. 



has sent me a leaf from the Nightingale Valley, collected by Miss 

 At wood in 1852. This leaf certainly presents some approach to P. 

 eu aria, but I have a specimen from Miss Atwood, probably from the 

 same tree, as it is labelled Nightingale Valley, 1852, which has fewer 

 veins and more deeply lobed margins, being in fact quite undis- 

 tinguishable from Mr. T. B. Flower's Leigh Wood specimens, which 

 after all may be from the very same tree as Miss Atwood' s. Mr. T. 

 II. Archer Briggs says of this, '' the odour of the flowers is very 

 sickly and disagreeable in the Devonshire plant; " so in this it appears to 

 agree with P. eu-aria, which it also resembles in the size and colour 

 of the fruit. The broader the leaves of this plant, the more 

 the lobes point outwards ; in the narrower forms they point 

 towards the apex of the leaf. Garcke, in his ''Flora des nord und 

 mittel Deutschlands," describes P. latifoUa under the name of P. 

 Ai'ia-torminalis. Certainly in the texture of the leaves and the 

 character of their pubescence when young there is a departure from 

 P. Aria in the direction of torminalis, and in the broader-leaved 

 specimens the form of the leaf and of the lobes approaches that 

 species, and were P. latifolia not so abundant, the most probable 

 solution would be that it was a hybrid between P. Aria and P. 

 torminalis, and there is nothing in its distribution in England and on 

 the Continent to forbid the supposition. 



4. PyruB scandica. In 1869, I first made acquaintance with P. 

 scandica as a wild plant in Britain, Mr. A. Craig Christie having in 

 that year sent to the Botanical Exchange Club numerous specimens 

 collected in Glen Eis-na-vearach. Some of these are precisely 

 similar to Scandinavian specimens in my possession, but the majority 

 of them have the leaves naiTower and more deeply lobed. Specimens 

 from the Crook of Devon, where no doubt the tree has been planted, 

 agree well with the Scandinavian ones, though even this has the 

 leaves more deeply lobed than the Stockholm plants, though not more 

 so than those from TJpsal. P. scandica differs from P. latifolia in the 

 texture of the leaves, which are less coriaceous, having much the 

 same texture as those of the Mountain Ash. The leaves become 

 glabrous much sooner, long before they are full sized, and show no 

 trace of pubescence above in any specimens which I have seen in 

 flower, either fresh or dried. But what gives the greatest difference 

 of aspect is, that the general outline of the lobes of P. scandica is 

 oval or roundish, not deltoid or triangular. The degree of serration 

 of the lobes varies much, but the terminal tooth is usually larger and 

 sharper than the others, without, however, being so much so as to 

 destroy the general curved outline of the lobe. The pubescence on 

 the underside is greyer, and still less dense than in P. latifolia, and 

 the tertiary veins are more apparent on the under side of the leaf. 

 The lobes, too, diminish in size less rapidly from the base to the apex, 

 and generally speaking are deeper than in P. latifolia. According to 

 Fries they are sometimes so deep towards the base of the leaf, 

 especially on the shoots of the year, that they become pinnatifid ; some 

 of the Arran specimens have been divided nearly \\x\i way down. The 

 flowers of the living plants which I have seen had a rather pleasant 

 odour, resembling that of the Mountain Ash. The fruit of the Arran 

 plant is about the size of that of P. rtq)icola, aud according to Mr 



