a4 BOTANY. 



where, as sometimes found, it grows on open and higher ground, it adopts the general habit of 

 the trees of the country, and spreads out into a wide and tolerably compact head. The tree of 

 which the portrait is given (PL II) is of this character ; it is growing on the banks of Feather 

 river, a few miles above its mouth, and situated on the alluvial bottom but some 40 feet above 

 the stream, and a little separated from the belt of timber principally sycamores which line 

 its banks. This tree had a diameter of trunk of over 6 feet, an altitude of about 100 feet, and 

 a spread of branches nearly equal to its height, constituting one of the noblest specimens of 

 vegetation I have ever seen. 



The leaf of the Mexican sycamore, in form, color and texture, is considerably different from 

 that of its eastern representative. It is deeply cut, as represented in the figure, and is darker 

 oreen and smoother than that of P. occidentalis. The fruit is also in racemes of three to six, 

 instead of being solitary, as in that species. 



The bark is whiter than I have ever seen it in P. occidentalis, being sometimes as white as 

 milk on all parts of the trunk and branches. The dark, polished, and digitate leaves contrast 

 finely with the white bark, and give to the tree a much more tropical look than that of our 

 species. 



The figure given by Nuttall (1. c.) represents the leaf as pubescent or tomentose. I think 

 that is never its character, except when very young ; at least in different parts of California 

 where I saw the tree the foliage constantly exhibited the characters which I have described. 



The Mexican sycamore is apparently more southern in its habit than most of the trees with 

 which it is associated in California, the centre of its range being, probably, about the southern 

 line of that State. We found it bordering the Sacramento river and its tributaries in all parts 

 of the Sacramento valley, but did not meet with it further north. 



The wood of the sycamore of the west, like that of the common species and that of most of 

 the decotykdonous trees with which it is associated, is very brittle. Of its want of tenacity, 

 we had a striking illustration when encamped under the tree represented on the plate. 



Our beds were spread on the ground under its branches, nearly touching each other. During 

 the evening a fresh breeze blowing, but not a high wind we were warned by a cracking over 

 head that danger was impending, and had just time to &quot;stand from under,&quot; when a branch 

 about eight inches in diameter came crashing down directly where we had been lying. 



PINUS CONTOKTA. (Plate V.) The twisted pine. 

 P. CONTORTA. DougL in Lond. Encycl. of Trees, p. 9*75, j%. 915. 

 P. CONTORTA. Loud. Arboret, 4, p.. 2292, Jigs. 2210 and 2211. 

 P. INOPS, (P. distorta, DougL) Hook. Flor. Bor.-Amer. 2, p. 161. 



Description. A tree of moderate or small size, of a conical, and frequently very strict figure; 

 branches numerous, small ; leaves in twos, short, yellow-green in color ; cone generally ovoid 

 acute, sometimes spherical, three-quarters of an inch to one and a quarter inch in length, per 

 sistent for several years ; scales bearing short and acute spines ; seeds roundish, dark ; scale 

 elongated entire. 



We first met with this pine on the banks of Canoe creek, a tributary of Pit river, in northern 

 California. After leaving that locality we saw no more of it till we reached the banks of Kla- 

 math river above Upper Klamath lake. Here it was abundant, and continued common to the 

 Columbia. 



On Canoe creek it grows in the natural meadows bordering the stream, forming a moderately 



