IP s t c I s i a 177 



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, Japan and the Himalayas 



Abies heterophylla Rafinesque, Atlantic 

 Journal, i iiig. 1832. 



{Tsiiga heterophylla (Rafinesque) Sargent]. 

 VTsuga Mertensiana (Gordon not Bongard) 

 Carriere] Western Hemlock. 



A large tree with slender, usually pendulous 

 branches and very slender pubescent twigs; 

 leaves distichous, flat, dark green and conspic- 



