85 
to cultivate romp! in Britain than those from the western side 
of the continent. Its great hardiness is the principal point in 
its favour, but it is quite probable that more remunerative trees 
can be grown quite as well, if not better, than the white spruce up 
to an altitude at which a paying forest would cease in this country. 
As a shelter belt for some other tree, it is doubtful whether it 
would prove a general success on account of its slow growth, there- 
fore there is little that can be advanced in its fav 
Forbes, “ Development of British Forestry,” p. 119, however, 
gives an illustration of some nice trees growing at an elevation of 
1500 feet in the Pennines. 
Tue Norruern Scrus Prive (Pinus Banksiana, Lamb.).—On 
some estates in Scotland the cultivation of this pine under forest 
will ever be of any commercial value. its best it is a scrub 
pine, and little can be said in its favour ak aane that it is very Phabay, 
and that it might form cover or shelter at a high elevation where 
little else would grow. Even then it is probable that P. montana 
var. uncinata would prove to be the better tree. 
VII._THE GENUS NAUTILOCALYX. 
T. A. SPRAGUE. 
Living plants of three Peat tem species of Gesneri- 
aceae were presented to cit in 0 by Messrs. Sander & owe 
is the type and sole species of Episcia, section Nau ates | Benth. 
he fil. (Gen. Plant. vol. ii. p. 1007). It differs from the 
becied he eee to widen the definition of the section 
Nautilocalyz ty excluding the two characters peculiar to the type 
species, so as to admit Alloplectus Lynchit, Episcia hirtifiora and 
their allies. 
The question next arose as to whether Nautilocalyx should be 
retained as a section of Episcia, transferred to Allo plectus, or 
treated as a distinct genus. A preliminary iuikehtiefa tials soon 
showed that Alloplectus and Episcia were ill-defined, and that until 
their distinguishing characters were better understood it would be 
premature to revive the genus Nawtilocalyz. On account of the 
nature of the placentation (see below), it was decided to transfer 
