390 Wiegand : Notes on Saxifraga and Primula 



or rounded, and crenate at the apex, entire below, 2-2.5 (rarely 3) 

 cm. long : umbels 2— several-flowered, sparingly farinose : involu- 

 cral bracts subulate, acute, 5 mm. long, somewhat dilated at the 

 base and slightly auriculate ; pedicels short and stout, about 4 

 (rarely 7) mm. long : calyx glabrous or nearly so, narrowly obconic, 

 4.75—5 mm. long, the lobes narrowly oblong-ovate or lanceolate, 

 acutish, about one-half the length of the tube : corolla rather large, 

 deep rich blue, rarely paler, not flesh-colored nor pink, orange eye 

 large and conspicuous, tube yellow, scarcely exceeding the calyx, 

 the lobes 5—6 mm. long, broadly obcordate, the base gradually, or 

 more rarely abruptly contracted : fruit not seen. 



Eastern slope of the Rocky Mountains in British America. 



Specimens examined : " Along warm streams below the Sul- 

 phur springs/' Banff, Alberta, altitude 4500 feet (W. C. McCalla, 

 no. 2423 (1899)). 



In the Botanical Magazine, /. 2p?j, Hooker figured a plant 

 which he considered to be the true P. Mistassinica of Michaux. This 

 plate was probably drawn from plants grown from seeds collected 

 by Drummond and Richardson as these travelers were cited as 

 having brought back seeds of this species on their return from the 

 Canadian Northwest. The figure and the description leave little 

 doubt that Mr. McCalla' s plant is the one described by Hooker, 

 and not the eastern plant of Michaux. 



In general appearance P. Maccalliana resembles P. farinosa in 

 the rather dense umbel, stouter habit and densely rosulate, pale, 

 farinose, cuneate leaves ; and seems to be somewhat intermediate 

 between it and P. borealis. It differs from the former in its smaller 

 size, nearly sessile short leaves, and much smaller calyx with pro- 

 portionally longer more acute lobes. P. borealis is smaller and 

 more slender with smaller narrowly spatulate long-petioled leaves, 

 long-peduncled flowers, and subulate acutish calyx-lobes which 

 are dark-purple spotted. P. Sibirica is much larger with slender- 

 petioled leaves and longer calyx with short obtuse lobes, also 

 dark-blotched. 



From the eastern P. Mistassinica it differs quite markedly in 

 its stouter habit, broader and more farinose leaves, short -pedicelled 

 flowers, larger acute-lobed calyx, and large bluish, not pink or 

 flesh-colored, corolla with tube scarcely longer than the calyx, 

 and with a very prominent yellow eye. 



