﻿North American Polygonaceae. 49 



The type specimens were collected on the Barton Range, San 

 Juan county, Utah, on July 13, 1895, by Miss Alice Eastwood. 

 Number 132. (Distributed as E. Mearnsii) 



^Eriogonum nodosum. 



A white-tomentose shrub, .5-1.5 meters tall, with spreading, 

 forking branches. Leaves small, 2-6 mm. long ; blades elliptic or 

 elliptic-ovate, acutish, revolute, narrowed into short petioles : 

 bracts scale-like, acute or acuminate : involucres turbinate-cam- 

 panulate, 2.5 mm. long, angled, sessile; segments broad, much 

 shorter than the tube: calices glabrous, pink, 3 mm. long; 

 ments rounded at the apex, the 3 outer oblong or obovate-ob- 

 long, the 3 inner cuneate : filaments villous below the middle : 

 achenes 3-angled, scabro-pubescent above the middle. 



In dry soil, Don Cabesas, California. Summer and fall. 



A 



Eriogonum Pringlei and its western homolog 



more robust and sparingly branched. All parts of the inflorescence 

 are at least one-third larger, while the calyx-segments are narrower 

 than in E. Pringlei. The achene is scabro-pubescent above the 

 middle as contrasted with the glabrous achene of its homologue 

 The original specimens were found at Don Cabesas, California, 

 on November 1, 1890, by Mr. C. R. Orcutt. Number 1462. 



^Eriogonum pallidum. 



Perennial. Foliage clothed with a grayish-white tomentum : 

 setm branching: leaves (lower ones not seen) alternate; blades 

 linear-oblong to linear lanceolate, 1-2 cm. long, short-peteoled : 

 scapes erect, topped by an umbel of three or more divisions, each 

 division dichotomous or trichotomous below: bracts whorled, the 

 lower linear, the upper scale-like : involucres sessile or some of the 

 lower ones short-peduncles, obovoid, 2.5 mm. high, secund, some- 

 what crowded towards the ends of the branchlets ; segments triang- 

 ular to ovate, each surrounded by a scarious, half-circular ciliate 

 margin : calices white to pink, glabrous, 2-2.5 mm - Jong, contracted 

 into a very short base ; segments unequal, the 3 outer oval or oval- 

 obovate, retuse or notched at the apex, the 3 inner shorter and 

 smaller than the outer, oblong or oval-oblong, rounded at the apex : 



mi 



Arizona and the Little Colorado 



River. Summer. 



A. peculiar pale tomentose species related to Eriogonum effusum. 



