339 
moisture-laden air of the region, but to the direct rays of the hot, summer sun, and, 
probably also, to the influence of the salt water in the soil. The similarity in the 
leaves of these plants, in the light of their diversity in natural relationship and their 
subjection to the same environment, is strong evidence of their adaptive modification 
for a common purpose. 
Potentilla palustris (L.) Scop. Fl. Carn. ed. 2, i, 359 (1772); Comarum palustre L. 
Sp. Pl. i, 502 (1758). Type locality, European. ; 
Along the Ankow River, about 10 kilometers from the point where it empties into 
Yakutat Bay, July 16 (No. 63); growing abundantly in fresh-water swamps near the 
stream. 
Potentilla procumbens (L.) Clairv. Manuel, 166 (1811); Sibbaldia procumbens L. 
Sp. PL. i, 284 (1753). Described from European specimens, 
At Dalton Landing, August 15 (No, 124). The species was nearly past flowering. 
Potentilla villosa Pall.; Pursh, Fl. i, 353 (1814), The type specimens, which 
Pursh saw in the herbarium of Lambert, came from the ‘northwest coast” of North 
America, In Ledebour’s Flora Rossica the recorded American localities in which 
specimens were collected by Pallas are the islands of Kadiak and Unalaska. 
Found only at a few points in Disenchantment Bay, August 8 (No. 94) and August 
10 (No. 103), from sea level to an altitude of 650 meters. At this time the plant was 
nearly past flowering. 
Sanguisorba latifolia nom. nov.; Sanguisorba canadensis latifolia Hook. Fl. Bor. 
Amer. i, 198 (1834); Sanguisorba sitchensis C. A, Meyer; Trautyv. & Mey. Fl. Ochot. 
35 (1856); Poterium sitchense Wats. Bibl. Ind, 303 (1878). The plant was described 
from specimens collected by Scouler at ‘‘Observatory Inlet, Northwest coast of 
America” and by Chamisso at Unalaska, 
Along the Ankow River, about 10 kilometers above its mouth, July 16 (No. 66), on 
the edges of sandy blutis along the river bank. 
Sorbus occidentalis (Wats.) Greene, F1. Fran. 54 (1891); Pyrus occidentalis Wats, 
Proc. Amer. Acad. xxiii, 263 (1888). The type specimens are from the higher moun- 
tains of Washington, Oregon, and California. 
_ Disenchantment Bay, August 5 (No.92). Only two specimens were seen, forming 
trees 2 to 3 meters high and growing at an altitude of 250 meters. The plant is 
referred to S. occidentalis with doubt; for while it has leaflets entire for their lower 
half, like those of that species, its young shoots are densely pubescent with brown 
hairs and the flowers are unusually large, the petals reaching a length of 5to 6mm., 
and the calyx-throat a breadth of 5mm. ‘Theeymes are 3 to 5 cm, in diameter, and the 
leaflets nine to thirteen in number, the larger 5 cm, long. The plant is not referable 
to typical 8. sambucifolia. 
SAXIPRAGACES. 
Saxifraga bronchialis L. Sp. Pl. i, 400 (1753). Type locality, Siberia. 
Disenchantment Bay, August 5 (No. 91); growing on the mountains at the altitude of 
from 575 to 1,150 meters. The leaves of this plant present the thick body and thin 
margins that occur also in Bryanthus glanduliflorus. 
Saxifraga mertensiana Bong. Veg. Sitch. 141 (1831). Type locality Sitka. 
At the base of Mount Tebenkof, June 22 (No. 41); abundant along the bank of a 
stream. 
Saxifraga punctata L. Sp. Pl. i, 401 (1753). Type locality, Siberia, 
At the base of Mount Tebenkof, June 22 (No. 40); growing with No. 41. 
Saxifraga stellaris L. Sp. Pl. i, 400 (1753). Type locality European, 
On the east side of Yakutat Bay, 25 kilometers north of the Mission, July 14 (No. 
60); growing along a stream. The name S., stellaris is here used for this plant to 
emphasize the fact that, while commonly referred to S. leucanthemifolia of Michaux, 
now 8. michkauxii Britton, itdoes not really belong to that species. The type locality 
