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Philadelphus Lewisii is also a conspicuous plant along tiny runs and 
Pentstemon venustus adds clumps of rich color. Beneath the yellow 
pine of the upper canyon near Orofino, Monardella odoratissima is 
frequent, and Hypericum perforatum, abundant and increasing in range. 
These regions, however, are somewhat beyond the limits of the present 
work. 
LACUSTRINE 
Lakes and the associated marsh land which occurs in the north-central 
part of our area, support a varied aquatic flora. Nympozanthus poly- 
sepalus is always a conspicuous element, especially where marshland 
meets lake. Brasenia Schreberi is occasionally seen and locally abun- 
dant. 
Along the shallow shores of lakes occur several species of Potamogeton 
such as P. Richardsonii, P. natans, P. amplifolius, P. gramineus and 
P. pusillus. 
In shallow muddy lagoons Utricularia vulgaris is frequent. 
On sandy shelving lake bottoms through crystal clear water may be seen 
numerous individuals of Isoetes Braunii and I. Howellii, locally very 
abundant. 
Along lake margins Sagittaria cuneata and S. latifolia are frequent. 
In lagoons which become partially dry in the sumer, Comarmm palustre 
or Alisma plantago-aquatica are conspicuous, and, with sedges, fre 
quently cover large areas. 
Sai Die 
NN dane rege 
