368 



the latter it may be distinguished by its habit, its more or less 

 turbinate calyx-tube and the calyx-segments, which are triangular- 

 ovate and about as long as the tube. In Saxifvaga Pennsylvanica 

 the calyx-tube is campanulate, the segments ovate-lanceolate or 

 ovate and twice as long as the tube. The petals of the new spe- 

 cies are oblanceolate or nearly linear, while those of its eastern 

 relative are lanceolate or linear-lanceolate. 



Saxifraga NooTKANA Mocin ; Engler, Monog. Sax. 135. 1872. 



Saxifvaga Stellaris var. Bninnoniajia Bong. Veg. Sitcha, 140. 

 1 83 1. Not 5. Bninnoniana Wall. 



Saxifraga leiicanthemifolia var. Bninnoniana Engler, Monog. 

 Sax. 135. 1872. 



Saxifraga Bongardi Presl ; Engler, Monog. Sax. 1 35. 1872. 



This is one of our northwestern forms that has usually been 

 included under Saxifraga leiicantJieviifolia [S. Michauxii). It is 

 more closely related however to the old world 5. stellaris, but is 

 nearer the Alleghenian S. Michanxii than any of the several west- 

 American species of the subgenus Arabidia that have so persis- 

 tently been referred to the Alleghanian form. 



Saxifraga ferruginea Graham, Edinb. Philos. Journ. : 349. 



1829. 



This is another Arabidia of the Northwest. It is apparently 

 very rare and has usually been referred to a variety of S. Michauxii 

 {S. leucanthemifolia Michx.) or included in that species. Some of 

 its distinguishing marks are the low stunted stature, the reddish- 

 brown tomentum and the short few-flowered one-sided corymb. 

 The only recent collection appears to be that of Dr. G. M. Daw- 

 son, made on the Queen Charlotte Islands in July, 1878. 



Saxifraga Nuttallii. 



Saxifraga clegans Nutt.; T. & G. Fl. N. A. i : 573. 1840. Not 

 Sternb. 1832. 



Little was known of this beautiful and most delicate Saxifrage 

 until it was rediscovered in Oregon in 1 871 by E. Hall (156). 

 There is a good and ample specimen of Nuttall's type in the Co- 

 lumbia University Herbarium. Mr. Howell has lately found it at 

 three localities in Oregon. 



