164 Postelsia 
B. Twigs with or without sterigmata, leaves flat, 
petioled, furnished with lateral resin ducts, 
cones axillary, pendulous, cone-scales per- 
sistent, shorter than the bracts. Pseudotsuga 
C. Twigs without sterigmata, marked with cir- 
cular leaf scars, cones axillary, erect, cone- 
scales deciduous from the persistent axis. 
Eu-A bies 
section 1. Picea: Link. Abhand: Akad. Besun 
170.1827... £530..aS Senus. ophuce: 
Leaves quadrangular or flattened, seldom 
twisted so as to appear two-ranked; leaf bases 
becoming woody and persistent as prominent 
sterigmata; resin ducts of leaves lateral, two or 
sometimes only one or none; leaves stomatiferous 
on all four sides, or in species with flat leaves 
mainly on the morphologically upper side. 
Flowers terminal, or in the axils of the upper 
leaves of the growth of the previous year. Stam- 
inate flower with a short, or occasionally a long 
slender pedicel; anther sacs opening longitudin- 
ally, surmounted by an orbicular toothed crest; 
pollen grains with bladder-like appendages. 
Pistillate flower erect, short-stalked, with bracts 
