2. Ae tonuifolia Nutt. —H-s A small tree in our range, less often forming 
Clumps, 8-12 m. tall, (D.BeH. 10-20 cm.) mature bark fissured, dark grey, ee 
younger bark steely grey with a lustre, lenticels often but not always transverse, 
becoming corky and broken into vertical fragments in older bark, fairly mature 
bark longitudinally striate within when peeled. quickly bec ch t Ae 
brown, staining the fingers; branchlets olivaceous, pubescent; bud scales — ae 
puberulent, not resinous; leaves 5-10 cm long, oval, mostly obtuse, subtruncate 
at the base, at least in some, both surfaces dull, the lower pubescent on the = 
veins, margin distinctly double toothed, the larger teeth blunt, the smaller 
usually so, petioles 1-1.5 cm. long, puberulent, stipules elliptical, 1-1.5 om. 
long, eaayuebobes twisted-curling, soon deciduous; staminate catkins 5-6 cm. se, 
long, calyx lobes rounded, shorter than the stamens; pistillate catkins commonly = 
6-8 in terminal clusters, ovate when mature, 12-14 m. long; scale lobes .8-1 m, | 
long; peduncles stout, commonly 4-5 mm. long, 1.5 mm. thick, glandular; nutlets 
elliptical in outline, 2.5 mm. long, each wing scarcely equal to or less than 
their diameter. 
Throughout our range but largely confined to alluvial soil of stream 
bottoms, usually below 3000 feet. 
— - hae ree 
a ero 
Se Ae rhombifolia Nutt. ——>A well developed tree with trunks 10-15 m. tall 
and DePeHe of 20-50 cm., the bark dull, soft gray, little or not at all 
fissured, longitudinally striate within when peeled, quickly changing color to 
& rich cinnamon brown, staining the fingers, the branchlets gray, pubescent; 
bud scales pubescent; leaves prevailinsly 6-12 cm. long 55-7 cm. wide, 
- prevailingly oval or ovate, rounded or very obtuse at both ends, very thin and 
soft, with a flaccid drooping hapit on the tree, pubescent on both surfaces, 
the upper sometimes glabrate, the margins finely and irregularly toothed, the 
teeth scarcely 1 mm. tall, infrequently somewhat double toothed; petioles 
1-1-5 cm. long, pubescent; stipules 5-6 mn. long, oblong-lanceolate, pubescent; 
Staminate catkins not seen; pistillate catkins commonly 4-5 in terminal clusters, 
narrowly ovoid, 10-12 mm. long, borne on rather stout peduncles 5-8 mm. long, 
l mm thick; seeds not seen. 
Gittle Bear end Potlatch) 
Locally numerous in .A canyons tributary to the Clearwater River; not 
observed within our region proper, but may occur in the broader valleys. 
ae eo ae ae Te a 
