32 Muhlenbergia, Volume 3 
STREAMS 
The course of the Truckee river from its source in Lake 
Tahoe to Pyramid Lake has already been outlined. Its banks 
through the Truckee Valley are thickly covered with a dense 
growth of a form of Populus balsamifera, P. trichocarpa, Salix 
argophylta, S. laevigata? S. lasiolepis, S. padophylla, and Alnus 
rhombifolia. Populus tremuloides occupies large areas along 
the streams in the yellow pine belt, where it produces mere 
saplings or underbrush. In the fall these golden patches around 
the springs are very striking from Reno. At lowest elevations 
it forms a good sized tree, but it is not abundant in the valley. 
Populus Fremonte# takes the place of all other poplars in the 
more desert region beyond the Virginia mountains. Near Pyra- 
mid Lake there is a good sized forest of it, the trees very large. 
Along the banks of the river we find Rosa Woodsit? Prunus de- 
missa, Ribes aureum, R. tenutflorum, Mimulus Langsdorfit, 
Cicuta vagans, Phacelia ramosissima, Vicia linearts, Artemisia 
aromatica, A. Kennedyt, Allium acuminatum, Erigeron Can- 
adensis, Epilobhium panticulatum, <Asclepias speciosa. At 
higher elevations than the valley, some of the creeks coming 
down from the melting snow have the following species in lim- 
ited quantities: Acer glabrum, Alnus tenuifolia, Amelanchier 
Cusickitz, Ribes cereum, R. viscosissimum, and Rubus Nutkanus. 
Many of the species that occur along the Truckee, such as Pop- 
ulus tremulordes, P. balsamtfera, and the willows, extend up 
the creeks to about 7000 feet elevation. 
This meager outline will be of considerable interest if read 
in conjunction with the following excellent publications on 
phytogeography: 
Parish, S. B. A Sketch of the Flora of Southern California. 
Bot. Gaz. 36: September and October, 1903. 
Hall, H. M. A Botanical Survey of San Jacinto Mountain. 
Univ. Cal. Pub., Bot. 1: 1-140. Al. 7-74. June 7. 1902. 
Piper, C. V. Flora of the State of Washington. Cont. U. S. 
Nat. Herb. 11: 1906. 
University of Nevada, Reno, Nevada. 
