Hardy Species of Enkianthus under Cultivation 
in the Royal Botanic Garden, Edinburgh. 
BY 
WILLIAM GRANT CRAIB, M.A., 
Lecturer on Forest Botany and Indian Forest Trees 
in the University of Edinburgh. 
ATTEMPTS, some years ago, to arrange the herbarium material 
of Enkianthus, and more especially of the campanulatus series 
of the genus, only served to prove that this genus, like so many 
of its allies, must be studied from living material. Since my 
transference to Edinburgh my attention has been directed by 
the Regius Keeper to the material under cultivation in the 
Royal Botanic Garden. 
In spite of the comparatively recent revisions of the genus 
by Palibini,* Wilson, jand Schneider, { great confusion apparently 
Still exists. The experience of this establishment is not an 
isolated one. Attempts to purchase E. cernuus and E. sub- 
sessilis direct from Japan have always resulted in the addition 
to the collection of plants of the campanulatus series. Failure, 
however, to introduce the two species named has resulted in 
our having here a set of the campanulatus series which contains 
Some very distinct plants. 
At present only two of the groups of the genus are repre- 
sented among our hardy plants, viz. the perulatus group repre- 
sented by E. perulatus and the campanulatus group in which 
two distinct geographical series may be recognised: (1) the 
series of true campanulatus, with glabrous pistil, all natives of 
Japan, and (2) the deflexus series with hairy pistil, inhabitants 
of E. Himalaya and W. China. 
No difficulty attaches to the recognition of E. perulatus or, 
as it is probably more widely known under cultivation, 
japonicus, either from vegetative or from floral characters. 
Vegetatively probably the most distinctive character is to be 
found in the course of the petiole with respect to the branchlet. 
The petiole is adpressed to or at least parallel to the branchlet 
throughout its length, the lamina alone spreading obliquely 
* Script. Hort. Bot. Petrop., xv, p. 8 ¢ Gard, Chron., xli (1907), p. 311. 
~ Laubholz. ii, p. 519. 
[Notes, R.B.G., Edin., No. LIV, October 1919.] 
