ijS THE PLANT WORLD. 



mostly unbranched thallus, an inch or less high, terminating in a dark- 

 brown apothecium. Species of Usnca and Alcctoria were common, 

 but of a rather small size and sterile. Among mosses I found a fruit- 

 ing Scouleria on rock just above the water of Dyea creek; an Andrecea^ 

 apparently pctropJiila, on rock higher up; a Sphaginan, much like 

 teres, growing among other mosses on wet rock ; also abundant speci- 

 mens belonging to Cynodontiiini and Dicranuui. On Almis and Cot- 

 tonwood a species of Ulota was common ; also an OrthotricJiuvi and a 

 single bit of Neckera was found on the shady side of a large cotton- 

 wood, as well as A^. Douglasii orv rock. AntitricJiia gigantca, Hyloco- 

 miuvj triqiietruin and H. sqiiarrosiiui were common, as well as many 

 species included in PolytricJmni, Hypnuni and Bryum, among others. 



Beyond Sheep Camp there is very little timber or brush near the 

 trail till some three or four miles the other side of the summit. Then 

 a scrubby evergreen, perhaps a depressed form of Tsiiga viertcnsiana, 

 occurs. Farther down in the canyons draining into Lake Lindeman 

 at least three species of trees grow, all distinct, I believe, from those 

 on the coast side. A fir, Abies ainabilis, growing to a diameter of 20 

 inches or so, is much the most abundant species, and is the one chiefly 

 used to saw up into lumber for boats, furnishing a rather poor mate- 

 rial, except that the wood is quite soft and thus easier to whip-saw. 

 The next in abundance is a pine, P. eontorta, growing commonly in 

 the lower and dryer situations and attaining to about one-half the size 

 of the preceding. It becomes much more common a little farther 

 down the Yukon, continues for quite a distance and then seems to 

 disappear entirely. The third tree is a Picea, rare about Lindeman, 

 but common farther down the river and becoming the principal tree 

 about Dawson. This Pieea is much like the one on Dyea creek, but 

 has cones with wider scales and not erose at tip as in that species. 

 Neither one of these species, however, as near as I remembered, is 

 quite like the tree I have called P. Engeli/iaiini, as it grows in Montana. 



We remained in camp at Lindeman from early in April to the end 

 of May, engaged in getting our goods down to the lake and building 

 a scow and small row-boat to go down the river in. During this time 

 I collected quite a number of the mosses and lichens of the region and 

 made some observations on other plants, although the snow covered 

 the greater part of the country almost up to the time of our departure. 

 On the rocky ridges about the lake were various species of the Heath 

 family, nearly all bearing fruit of the preceding year. The bear-berry 

 was abundant, also Pyrola rotiindifolia and P. secuiida, and a dwarf 

 cranberry grew in the scanty soil among the rocks, some two or three 

 inches high, and often loaded down with fruit about one-fourth inch 

 in diameter and still in good condition for eating. On ledges was a 



