— 50 — 



iant, much like Polytrichum commune. It does not, however, make very good 

 museum specimens as the pedicels curl and tangle. It grows at high altitudes 

 and, for this reason, during the winter is covered by a deep blanket of snow. 



Having rested, we made a final push for the top. Just below the summer 

 snow line, under the shelter of the rocks, I collected a Grimmia, belonging near 

 ovata. It was fruiting nicely. Having gained the top, we turned and looked 

 back at the wonderful view which spread out like a panorama before us. Mount 

 Hood in Oregon, a hundred miles to the south, on whose slopes Prof. Frye had 

 collected my specimens of Polytrichadelphus Lyallii, was plainly visible. The 

 cone of Mount St. Helens was to the right, and a little to the left the snowy 

 dome of Mount Adams appeared like a small replica of Mount Rainier. It was 

 a memorable day, not only from a bryological, but also from the scenic stand- 

 point. 



Evening found us where we had camped the night before. Weary from our 

 long day on the mountain, we began our preparations for the night, when sudden- 

 ly the fog banks began to 'roll in over the Tatoosh Range and we hastily sought 

 shelter. The next morniag, leaving the mountain wrapped in heavy fog, we 

 started for home. As we neared Tacoma the clouds broke away and, turning, 

 we had a most gorgeous view of Rainier, — ^a fitting close to our happy trip. 



Seattle, Washington. 



APLOZIA PENDLETONII PEARSON, N. SP. 



Wm. Hy. Pearson 



Growing in lax tufts; no fiagella; medium size; dark reddish brown colour, 

 upper branches almost black. Stem flexuose, simple or dichotomously branched; 

 branches 2 to 5 arising from apex of stem; rootlets few, short, discoloured. Leaves 

 imbricate, below somewhat distant, subsecund, amplexicaul, erecto-patent to 

 erect, orbicular, some slightly retuse; texture flaccid; cells medium size, quad- 

 rate, walls thin, trigones absent or minute. Bracts similar to the leaves. 



Only one immature perianth seen, free from bracts, very small, obovate, 

 upper portion with 5 obtuse angles. No plants seen. 



Dimensions: Stems i to inches long. Leaves 1.6 mm. x 1.7 mm — i.i 

 mm. X 1.3 mm. — 1.2 mm. x i.3 mm.; base of leaf o.i mm. thick; cells 0.04 — 

 0.03 mm. in diameter. 



Habitat: In slow running water, 4,000 ft., Sissons, California. Collector, 

 George M. Pendleton, 4th August, 19 17. 



Observations: This plant was sent to me under the name of Jungermannia 

 cordifolia Hook., from which it differs in its orbicular leaves, broader than long, 

 and larger cells with thin walls. The most remarkable character of the species 

 is the thickened base of the leaves, the leaves being two cells thick up to foijr 

 cells from the base. The two layers are not regularly arranged cell on cell, but 

 cross each other. 



