54 



BOTANY. 



of the cone. Seeds small, ovoid, black, wings elliptical entire pellucid ; male flowers in small 

 nearly spherical capitula. 



This beautiful fir, one of the finest of the genus, was discovered by us on the summits of the 

 Cascade mountains, latitude 44° north. It is the most alpine in its habit of all the firs ; 

 extending from the height of 6,000 feet to the line of perpetual snow. It will, doubtless, be 

 found in similar circumstances on other parts of the Cascade range, hut we saw it only about 

 the group of mountains called the Three Sisters. It forms a tree of one hundred feet in height, 

 of which the form is rather spreading and irregular, but remarkably graceful. The foliage is 

 light and feathery, its color a clear, but not dark, yellow green. The cones are pendant, ovoid 

 acute, purple, 1£ inch long by ^ inch wide, somewhat resinous when attached to the tree, but 

 when the seed is discharged, they fall, and present the remarkable appearance of figs. 19a 196, 

 the scales being nearly all strongly reflexed, while a few near the base are slightly expanded 

 and not reflexed. 



I have given this beautiful tree the name of the commanding officer of the expedition, as a 

 slight acknowledgment of the unremitting kindness which I received in my official capacity 

 while connected with the party, as well as an imperfect expression of the personal esteem which 

 he so uniformly gained from those who were brought into intercourse with him. 



Abies Douglasii, Lindl. (Plate VIII.) Douglas' Spruce. 



A. Douglasii, Lind. in Penny Cyclop. I, p. 32. 



Pinus Douglasii, Lamb. Pinus Ed. 2, 2 t. 47. 



P. Douglasii, Loudon, Arboret, 4, p. 2319. 



P. Douglasii, Nuit. Sylv. 3, p. 129, t. 115. 



P. Douglasii, Hook. Flor. Bor. Amer. 2, p. 162, t. 183. 



Fig. 20. 

 Fig. 20. Cone, leaves, aud scales of Ji. Diuglasii, natural size 



