228 The Trees of Great Britain and Ireland 



to the longer and terminal ones. Cones oblong-cylindrical, large, composed of 

 numerous (about seventy) scales. 



This section includes one species : 



1. Tsuga Pattoniana, S^ndclauze. Western North America. 



II. Micropeuce, Spach, Hist. Vig. xi. 424 (1842), identical yi\'Ca. Eutsuga, Engel- 

 mann, loc. cit. 120(1 880). 



Leaves flat, grooved above, bearing stomata on the lower surface only, pectinately 

 arranged on the branchlets, which are all in one plane. Cones ovoid, small, com- 

 posed of few scales, rarely more than twenty-five. 



This section comprises the remaining species, of which six are in cultivation in 

 this country. These may be conveniently arranged as follows : 



A. Leaves serrulate in margin. Shoots pubescent. 



2. Tsuga Canadensis, Carri^re. Eastern North America. 



Leaves, ^ to f inch long, usually tapering from the base to the acute or rounded 

 apex ; lower surface marked with two narrow well-defined white stomatic bands, the 

 part of the leaf external to them being pure green in colour. Buds brown, ovoid, 

 pointed, composed of pubescent, keeled acute scales. 



3. Tsuga Albertiana, S^n^clauze. Western North America. 



Leaves, ;|^ to f inch long, usually rounded at the apex and uniform in breadth ; 

 lower surface with two ill-defined broad white stomatic bands, which are indistinctly 

 continued to the margins, there being no distinct bands of pure green. Buds greyish, 

 ovoid, apex obtuse and flattened ; scales keeled, pubescent. 



4. Tsuga Brunoniana, Carriere. Himalayas. 



Leaves, i to i^ inch long, gradually tapering from the base to the acute apex ; 

 lower surface silvery white, stomatic bands well-defined and extending almost 

 to the margins. Buds globose, flattened on the top, surrounded at the base by a 

 ring of modified leafy scales, the other scales ovate, acute, pubescent. 



B. Leaves entire in margin. Shoots glabrous. 



5. Tsuga Sieboldii, Carriere. Japan. 



Leaves, \ to i inch long, oblong, rounded and notched at the apex, shining 

 above ; lower surface with two narrow well-defined white stomatic bands. Buds 

 red, ovoid, slightly acute at the apex ; scales glabrous and ciliate. 



C. Leaves entire in margin. Shoots pubescent. 



6. Tsuga diversi/olia, Maximowicz. Japan. 



Shoots pubescent, both on the leaf-bases and in the furrows between them. 

 Leaves, i to |- inch long, oblong, rounded and notched at the apex ; lower surface 

 with two narrow well-defined white stomatic bands. Buds red, pyriform, flattened 

 above ; scales obtuse, minutely pubescent. 



7. Tsuga Caroliniana, Engelmann. Southern Alleghany Mountains. 



Shoots pubescent in the furrows between the leaf-bases, which are glabrous. 



