THE PLANTS OF THE PRIBILOF ISLANDS. 565 



37. Cerastium alpinum, L. 



Common on both islands. Very variable, according to habitat. C. arvense, included 

 in Dr. Merriam's list on the authority of Dr. Vasey, could not be found in the United 

 States National Herbarium at Washington and has been excluded. The specimens 

 so named were probably a form of C. alpinum. 



38. Sagina linnaei, Presl. 



Common on earth and rocks on both islands. 



39. Sagina nivalis, Fr. 



Rare on St. Paul Island. 



40. Sagina . 



A few specimens of a minute caryophyllaceous plant were collected on St. George 

 Island by Mr. Trevor Kincaid in 1897. Dr. Eobinson, to whom the specimens were 

 submitted, decided that it was different from any caryophyll known to him, but the 

 material was too poor to base a new species upon. Though thought by Dr. Eobinson 

 to be an Arenaria, I agree with Mr. Holm, who also examined the specimens, that they 

 should be referred to Sagina. 



41. Claytonia sarmentosa, C. A. Meyer. 



C. arctica, Merriam's List. 



Common on both islands, generally with Viola langsdorfii. 



42. Montia fontaua, L. 



Common on mud flats and damp rocks on both islands. 



43. Geranium erianthum, DC. 



On a grassy bank by a pond near the south end of St. Paul Island. 



44. Lupinus nootkatensis, Don. 



One of the most conspicuous and characteristic plants on the Pribilof Islands. 



45. Lathyrus maritimus, Bigel. var. aleuticus, Greene. 



On beaches and among sand dunes on both islands. 



46. Rubus chamaemorus, L. 



In boggy places on both islands. 



47. Rubus stellatus, Smith. 



Upland meadows and on sandy soil on both islands. 



48. Rubus arcticus, L. 



Not so common as the last, but not rare on either island. Specimens easily sep- 

 arable from either species were collected in 1897, but as they may possibly be the 

 result of hybridization between R. arcticus and R. stellatus uo attempt to describe 

 them has been made. 



49. Geum rossii, Seringe. 



Hillsides and uplands on both islands. 



50. Sibbaldia procumbens, L. 



Bare on exposed banks and in the interior of St. Paul Island. 



51. Potentilla anserina, L. 



By ponds and marshes on both islands. 



