THE PLANTS OF THE PRIBILOF ISLANDS. 569 



corolla very large, rich black purple, its segments entire or somewhat erose, not einar- 

 ginate. Usually referred to P. nivalis. 



Very common on St. Paul Island, flowering a little later than P. macounii, but in 

 bloom for a much longer period. Rarer on St. George. 



92. Primula macounii, Greone, Pittonia, Vol. Ill, pp. 251 and 260. (Plate XOIII.) 



Stouter than the last; the rootstock branched, and the scapes and leaf clusters 

 thus tufted forming a mass; leaves obovate to oblanceolate, entire, glabrous, the 

 inflorescence slightly glandular, but without a trace of farinose indument; umbels 

 many-flowered and perfectly equilateral; calyx cleft well below the middle, its broad 

 segments oval, or, if narrower, somewhat spatulate-oblong; corolla much as in the 

 preceding, but of a lighter purple. 



More nearly related to P. parryi than to P. nivalis. The foliage in this last is of 

 much thinner texture, much more conspicuously veiny, even reticulately venulose, 

 the reticulations showing central glandular dots. The dried leaf is so thin as to be 

 perfectly translucent, and its margin is finely dentate, as Pallas's figure shows. But 

 in P. macounii the leaves are thick, completely opaque when dry, scarcely veiny, not 

 in the least reticulate or dotted; nor is there any trace of farinose indument. 



Very abundant, on St. George Island, flowering and maturing earlier than the 

 last. In living plants the flowers are much lighter in color in P. eximia than in 

 P. macounii, varying much, however, in dried specimens. 



93. Androsace villosa, L. 



Common on the slopes of the lower hills on both islands. 



94. Trientalis europaea, L., var. arctica, Ledelj. 



Never abundant, but found in many places on both islands. 



95. Gentiana tenella, Eottb. 



Eather rare on St. Paul Island. Found only on a few bare spots on low hills. 

 Flowers ochroleucous or blue. 



96. Gentiana frigida, Haenke. 



Common on both islands. 



97. Gentiana glauca, Pallas. 



Pare on the most exposed places on both islands. 



98. Polemonium caeruleum, L., var. grandiflorum, Ledeb. 



Abundant on the slopes of the lower hills on both islands. 



99. Polemonium pulchellum, Bunge, var. macranthum, Ledeb. 



Often with the last, but also on the more exposed hillsides. White-flowered 

 plants very common. 



100. Eritrichium chamissonis, A. DC. 



Common on St. Paul Island. 



101. Mertensia maritima, Don. 



Not rare along the seashore on both islands. 



102. Veronica serpyllifolia, L. 

 Springy places, St. Paul Island. 



