Chinese Species of Tsuga. 
BY 
DOROTHY G. DOWNIE, B.Sc., B.Sc. (For.) | 
Assistant in Botany Department, Aberdeen University. 
With Plate CXCIV. 
THE following paper is an attempt to arrange and classify the 
Chinese specimens of Tsuga in the herbarium of the Royal 
Botanic Garden, Edinburgh. ‘The material was collected in the 
south-west provinces of China, chiefly Yunnan, Szechuan and 
Western Hupeh. 
Up to the present, species and varieties known are the 
following :— 
Tsuga chinensis, Pritz. <A bies chinensis, Franchet. 
Tsuga yunnanensis, Masters. Abies yunnanensis, Franchet. 
Tsuga Brunoniana, Carr., var. chinensis, Masters. 
Abies dumosa, Loud., var. chinensis, Franchet. 
Tsuga Mairei, Lemée et Léveillé. 
In an enumeration® of Chinese Tsugas, Masters refers certain 
collections to T. Sieboldii. I have seen no specimen from Chine 
which can be referred to this species. In a later work} Masters 
enumerates under T. yunnanensis collections which in his 
previous paper he had included under T. Sieboldii. Henry 7156 
—one of the specimens so treated by Masters—I have, after com- 
parison with the type in Paris, referred to T. chinensis. 
Probably some of the other specimens which, so far, I have 
had no opportunity of examining, may have been wrongly in- 
cluded under T. yunnanensis by Masters. 
Diagnostic characters. ‘The condition of the leaf margin, 
generally employed in dividing the genus, was not a constant 
factor here and a division based on the character of the leaf apex 
was adopted. ‘The utility of this feature as a diagnostic character 
was strengthened on finding that all plants with an entire leaf 
apex bore strictly sessile cones, while those with the leaf apex 
emarginate had shortly stalked cones. In all cases where the 
# . Linn. Soc. vol. xxvi, p. 556 (1902). 
+ sh Lint Son srok/ cnet bas (eo 
_ [Notes, R.B.G. Edin., No, LXVII, April 1923.] 
