EVERGREENS OF IOWA 
333 
Cult, common. 
Campus. 
.N. and cent. Europe. 
FI. April. Fr. Oct. 
Note: This is deservedly popular as an ornamental tree, and greatly 
superior to the following. 
2. L. laricina Larch-like L. American L. Tamarack 
Cones about 1cm. long; trunk crooked, branches and branch- 
lets curved. 
Bract shorter than seminiferous scale, erect or incurved ; scale 
glabrous ; lvs. without white lines beneath. 
Cult, frequent 
Campus; 1807 Fourth Ave. ; 1510 East St. 
Lab. to Penna., Minn, and northward. 
FI. Apr.-May Fr. Oct. 
Note: The source of a tough, light timber, especially prized in ship 
building. 
3. Picea Spruce 
(The latin name of a. pine) 
Cone-shaped evergreens with lvs. 1.5-2. 5cm. long, bristling all 
round the branch ; lvs. slightly curved, 4-sided or diamond shaped 
in cross section. Cones drooping. 
Lvs. spirally arranged (one in ia place) leaving a hard prickle 
when they fall off. Cone scales thin, roundish. Stam. fl. catkin- 
like, each sporophyll with 2 sporangia. Pist. fl. crimson, the 
rounded scales longer than the bracts. Winter buds interspersed 
with lvs. at ends of shoots. 
1. Twigs yellow; lvs. green; cones 10-15cm. long i. P. abies 
1. Twigs ashy yellow; lvs. ashy; cones 2.5-5cm. long 2 . P. canadensis 
1. Twigs pale; lvs. bluish-waxy, very sharp y. P. pungens 
1. P. abies Fir S. Norway Spruce 
Large trees with horizontal branches and drooping branchlets. 
Lvs. pure green; branchlets deep yellow. Cones 1-1. 5dm. long, 
the scales rounded. 
Stam. fl. 2-3 cm. long. Pist. fl. 3-4cm. long. 
Cult, common. 
Campus; 1302 East St. 
Northern Europe. 
Fl. May Fr. Oct. 
Note: Probably the best tree for windbreaks, retaining the foliage well 
down to the ground. Distinguishable when young by the color of twigs 
and lvs. 
