﻿320 Small : North American Plants 



more coarsely toothed leaf-blades and shorter petioles ; but more 

 prominent characters exist in the inflorescence : The calices are 

 twice as large as those of Primula Rusbyi, the corolla-tubes are 

 comparatively stout and they never twice exceed the length of the 

 calices as do the very slender tubes of Primula Rusbyi. In addi- 

 tion, the lobes of the corolla-segments are destitute of the minute 

 but characteristic apiculations found in the related species. 



The original specimens were collected by Mr. Pringle on damp 

 ledges, Santa Rita Mountains, Arizona, at an altitude of 8000 

 feet, on July 25, 1884. 



Primula tenuis. 



Perennial, glabrous, bright green. Leaves basal, 0.5-1.5 cm. 

 long ; blades oblong, oval or suborbicular, undulate or toothed, 

 obtuse or acutish, much shorter than the slender petioles : scapes 

 erect, wire-like, 5-10 cm. tall, solitary : bracts linear-subulate, 1-5 

 mm. long: calices 3-5 mm. high, tubes turbinate, segments narrowly 

 lanceolate to narrowly linear, longer than the tube, acute : cor- 

 ollas pink, 4-5 mm. broad ; tubes surpassing the calices, 4 mm 

 long, notched at the apex. 



In moist places, Pastolic, Alaska. 



A delicate species related to Primula bar calls, but much more 

 slender ; easily distinguished by its flimsy leaves, shorter pedicels 

 turbinate calyx-tubes and narrow calyx-segments. The corolla 

 tube is further exserted than in Primula borcalis and the more 

 delicate lobes less deeply notched. 



The original specimens were collected by W. H. Dall, on 

 June 25, 1871, or 1872. 



