Postelsta 17 
“I 
on the under side, palisade tissue above and a 
single median resin duct between the vascular 
tissue and the lower epidermis. Staminate 
flower axillary or terminal, subglobose, with an 
elongated drooping pedicel; stamens short-stalk- 
ed, globose; anther sacs opening transversely, 
surmounted by a short, gland-like spur; pollen 
grains without bladder-like appendages.  Pis- 
tillate flower terminal, erect, short-stalked or 
subsessile, the «scales exceeding “the bracts. 
Fruit a woody, pendulous, or rarely erect cone; 
cone-scales much larger than the bracts, per- 
sistent after the fall of the seeds; the outer coat 
of the seeds furnished with resin vesicles. 
Six closely related species, natives of tem- 
perate North America, Japanandthe Himalayas 
Abies heterophylla Rafinesque, Atlantic 
journal. 1-110. 1832. 
[Tsuga heterophylla (Rafinesque) Sargent]. 
[Tsuga Mertensiana (Gordon not Bongard) 
Carriére] Western Hemlock. 
A large tree with slender, usually pendulous 
branches and very slender pubescent twigs; 
leaves distichous, flat, dark green and conspic- 
