1889. ] NEW YORK ACADEMY OF SCIENCES. 79 
distinct. Poas and Sporobolus are also abundant, and it was 
here, I think, that I collected Agropyrum Scribneri, Vasey. 
Ozytropus Lamberti, Pursh, one of the ‘‘ Loco-weeds,” is much 
too abundant among these pastures. Two very handsome forms 
of Senecio Fendleri, Gray, grow in dense tufts, afoot in diameter 
and one to two feet high. In the same manner grow Luphorbia 
Pringlei, Eng., and #. campestris, Ch. and Sch. A little swamp- 
land near the mountain is filled with Saliz rostrata, Rich. The 
herbage is closely cropped by the sheep, but we collect ”anwn- 
culus Hookeri, Regel (Rk. cardiophyllus), Claytonia perfoliata, 
Don., and Geranium cespitosum, James. Near the base of the 
mountain is a ranche, the door-yard filled with a luxuriant 
growth of Aster foliaceus, var. Burkei, Gray—a rich and beauti- 
ful aster, growing in large, loose clumps, with ascending stems 
a foot or eighteen inches high. A mound of scoria in the 
distance presents a golden surface of Heleniwm Hoopesii, Gray. 
This exceedingly meagre outline of the flora of the San Fran- 
_ cisco Mts. will apply generally to similar peaks scattered through 
this forest. On Bill Williams’ Mountain, however, situated 
some fifty miles to the south-west, I collected quite a number of 
additional species of interest. Among them were Heuchera 
rubescens, Torr.; Pentstemon Bridgesii, Gray, Berber.s repens, 
Lindl)., Potentilla rivalis, Nutt., var. millegrana, Wats., Mimu- 
lus floribundus, Dougl., Taraxacum, Aster pauciflorus, Nutt., 
Polygonum Bistorta, L., Smilacina sessilifolia, Nutt., Disporum 
trachycarpum, several 'Trifoliums and a Cimicifuga in flower 
only, perhaps our C. racemosa, Nutt. 
Besides its mountain flora, the forest region hasa distinct class 
of plants characteristic of the dry, stony knolls, 100 to 150 ft. 
high, which abound there. Of such plants I collected Hrigeron 
flagellaris, Gray, several species of Muhlenbergia, Mentzelia 
levicaulis, 'T. and G. (?), Spheralcea Emoryi, Torr., and a 
species which has been referred to Stephanomeria Wrightit, Gray, 
but which I am persuaded is distinct from that species. WS. 
Wrightit is characterized by great brittleness, with a weak, soft 
root, while the specimens here referred to possessed stems almost 
as tough as those of the flax, and long, tough, and hard roots. 
The timber, though heavy over the level portion, isnot dense, 
and the sharply stony surface is lightly and thinly carpeted with 
forest grasses, chiefly Sporobolus of several species, with quanti- 
ties of Muhlenbergia Wrightii, Vasey, here and there. LEvery- 
where thickly sprinkled among the grasses are numerous flower- 
ing species. Perhaps the most abundant plant throughout this 
region is Pentstemon linarioides, Gray, which displays a great 
variety of forms. Other of the most characteristic species are 
Oxalis decaphylla, H. B. K., Astragalus Arizonicus, Gray, 
