172 Postelsta 
median resin duct close to the hypoderm. Stam- 
inate flower axillary or terminal, subglobose with 
an elongated drooping pedicel; stamens short- 
stalked, globose; anther sacs opening trans- 
versely, surmounted by a short gland-like skin; 
pollen grains with bladder-like appendages. 
Pistillate flower sessile, terminal at the end of a 
short, leafy branchlet, the bracts exceeding the 
broad scales. Fruit a woody, pendulous or 
erect cone; cone-scales much larger than the 
bracts, persistent after the fall “of the seeds: 
seeds furnished with resin vesicles. 
This subgenus includes only the following 
species which is often included under 7suga, 
from which it differs in the form and structure 
of the leaves, the pollen grains with bladder- 
like appendages, and the long bracts of the 
pistillate flower. 
Abies Mertenstana (Bongard) Lindley and 
Gordon, Journ. Hort. Soc. Lond. 5:211.1850. 
[Abies Pattoniana Jeffrey ex A.Murray. 1853. | 
[Tsuga Mertensiana (Bongard) Sargent]. 
[Tsuga Pattoniana (Jeffery) Sénéclauze]. 
Mountain Hemlock. Patton Spruce. 
