,566 THE FUE SEALS OF THE PRXBILOF ISLANDS. 



52. Potentilla fragiformis, Willd. f. villosa, Pall. 



Oommou on rocky banks on both islands. 



53. Potentilla emarginata, Pursh. 



Exposed hillsides on both islands. 



54. Comarum palustre, L. 



Marshy places and by bogs and ponds on both islands, 



55. Saxifraga hieracifolia,Walclst. Kit. 



Not uncommon in damp mossy places on both islands. 



56. Saxifraga davurica, L. 



Eare on exposed slopes on both isl^pds. 



57. Saxifraga stellaris, L., var. comosa, Poir. 



Eare on high interior of St, George Island. 



58. Saxifraga nelsouiana, Don. 



A common and variable Saxifrage, generally referred to S, punctata, L., is found 

 on shores and islands throughout the Bering Sea region, but a comparison of this 

 plant with Morrison's figure, to which Linnaeus refers, shows that it is not 8. punctata. 



59. Saxifraga serpylUfolia, Purah. 



S. chrysantha, Merriam's list. 

 Not rare on exposed parts of interior of St. Paul Island. 



60. Saxifraga bracteata, Don. 



Common on damp rocks on both islands. 



61. Saxifraga hirculus, L. 



In boggy places, St, Paul Island. 



62. Saxifraga hirculus, L., var. alpina, Engler, Mon. Sax., p. 124. 



Low, 2 or 3 inches high, densely caespitose, the leaves broader than in the type, 

 subspatulate, petals larger, deep yellow. With Chrysosplenium beringianum on the 

 more exposed hillsides in the interior and toward the northwest end of St. Paul 

 Island. 



63. Chrysosplenium beringianum, Rose, Bot. Gaz., Vol.XXIII, p. 275. (Plate CXI.) 



"Eootstock 2.5 to 5 cm. long (?), creeping, sending off many long fibrous roots; 

 radical leaves and stems several, spreading and forming a dense rosette; radical 

 leaves small; petiole slender, 1.3 to 4.5 cm. long, broader at base, the margins (espe- 

 cially below) ciliate with long purplish hairs ; blade reniform, 6 to 11 mm. broad, 4 to 5- 

 crenate, crenations sometimes gland-tipped, thickish, pale, and glabrous below, dark 

 green and glabrous or somewhat pilose above; stem 2.5 to 5 cm, high, naked or 

 bearing a single leaf below the involucre; involucral leaves several, entire or 3-crenate, 

 extending beyond the flowers; calyx 5 to 6 mm. broad, 4-lobed, purplish or becoming 

 so ; sepals very broad, nearly orbicular, rounded at apex ; disk very prominent, strongly 

 8-lobed; fruiting calyx turbinate, 1 mm. high; capsule 2-horned, 6 to 10 seeded; seeds 

 oblong, 0.5 mm. long, shining, delicately reticulated. 



This species has been confused with G. alternifolium, from which it appears to be 

 abundantly distinct. 0. alternifolium differs in its habit in lacking the thickish root- 

 stocks and possessing only slender stolons and filiform roots; in its larger, usually 



