. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. 12 BULLETIN 722, U. S. DEPARTMENT OF AGRICULTURE. the year are comparatively short, so that the sporophores of peren- nial fungi may never at any time be entirely dried out. During the late fall, extending into December and coincident with the formation of new fruiting surfaces of the Indian-paint fungus, rain falls almost constantly. The average annual precipitation is between 20 and 30 inches, increasing rapidly with elevation, reaching a maximum of more than 40 inches in the highe
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. 12 BULLETIN 722, U. S. DEPARTMENT OF AGRICULTURE. the year are comparatively short, so that the sporophores of peren- nial fungi may never at any time be entirely dried out. During the late fall, extending into December and coincident with the formation of new fruiting surfaces of the Indian-paint fungus, rain falls almost constantly. The average annual precipitation is between 20 and 30 inches, increasing rapidly with elevation, reaching a maximum of more than 40 inches in the higher slopes. In the spring of 1915 investigations were begun on the river- bottom and slope sites of the Priest River valley in Idaho. The general altitude of the region is about 2,450 to 2,500 feet. The meanderings of the Priest River in former times created a number of. Fig. 9.—Cross sections of a hemlock branch in which heart-rot extended 10 feet out from the trunk, showing how the larger branches may be affected. swamps and bayous, which are filled with water during the greater part of the year. The interlying areas are poorly drained. The whole region is one of dense forests, composed of western white pine (Pinus monticola), western red cedar (Thuja plicata), western larch (Larix occidentalis), Engelmann spruce (Picea engelmanni), Douglas fir (Pseudotsuga taxifolia), western hemlock (Tsuga Jietero- pJiylla), grand fir (Abies grandis), western yew (Taxus brevifolia), western birch (Betula occidentalis), and Cottonwood (Populus tricho- carpa). The soil is a moist sandy loam, with much alluvial material and not well drainexl on the river-bottom sites. There is a great depth of humus, litter, and needles. On the above-described site, ten. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. o
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