560 71. AMENTIFERA. 
pedunculata are also thus named by collectors. It seems that 
Don’s name is applied to any intermediate-looking form, which 
cannot confidently be called either pedunculata or sessiliflora 
specially. 
Castanea vulgaris, Lam. 
Provinces 1 to 16; but always planted. 
Alien. Cyb. ii. 877. Often damaged by frost in spring. 
Betula (alba) glutinosa, Fries. 
Betula (alba) pubescens, Wally. 
Provinces all? Devon! Hants !-—to Highlands! 
Syn. 998. Cyb. ii. 881. The lateral lobes of the catkin scales 
are very variable in form and direction; though made much of in 
specific diagnosis as if uniform. 
Betula (alba) verrucosa, Ehrh. 
Betula (alba) pendula, Roth. 
Provinces all? Less frequent than the preceding segregate ? 
Syn. 993. Seedlings which spring under old pendulous trees, 
with rhomboid glabrous or sub-glabrous leaves, have their own 
leaves cordate-ovate and pubescent; a circumstance which tells 
something against the supposed distinctness of the extreme forms. 
Possibly each of them, glutinosa (with pubescens) and verrucosa, may 
have a variety pendula ? 
Betula intermedia, Thomas. 
Province - 15. Clova; “ Prof. Balfour, Colonel Brown.” 
Error. Cyb. ii. 882. Flora of Forfarshire, 163.—(In the two 
earlier editions of the Manual there was an attempt to divide 
Betula nana into two species “probably.” But as this was not 
repeated in after editions, it is little worth while here to introduce 
separate paragraphs for those abandoned segregates). 
Populus nigra, Linn. 
Provinces 1 to 16. [18. Shetland; Edm. flo. p. 37.] 
Alien? Cyb. ii. 885. This was treated as a native tree in Cybele 
Britannica, because so deemed by several of our provincial botanists. 
I have myself never yet seen a locality for it which could be 
declared a satisfactorily natural or unplanted one. 
Populus (tremula) glabra, E. B. 
Provinces - 15-1718. Aberdeen. Sutherland. Orkney. 
Syn. 997. Eng. bot. viii. 196. Probably in other provinces and 
counties besides those quoted. Very few of my herbarium specimens 
of tremula are in young leaf, and my attention in years past had not 
been directed to this variety in its living state. I think that it 
occurs in England; though the typical “ villosa”, with the young 
leaves densely silky, may be the form more frequent. 
