﻿52 Small: Studies in 



The original specimens were received from Dr. Ebert,U. S. A. r 

 who collected them at San Carlos, Arizona, in September and 



October, 1893. 



v Eriogonum trinervata. 



Annual, slender, acaulescent. Leaves basal ; blades suborbi- 

 cular or orbicular-ovate, 1-2 cm. broad, obtuse at the apex, trun- 

 cate or subcordate at the base, ciliate, pubescent with scattered 

 hairs, conspicuously 3-nerved, these impressed above, prominent 

 beneath ; petioles hispid below, widely forking above, the ulti- 

 mate divisions filiform: involucres goblet-shaped on spreading 

 filiform peduncles 6-15 mm. long, glabrous, 1-1.5 mm. long, with 

 an undulate border : calices deep pink, glabrous, nearly 2 mm. 

 long ; segments rounded at the apex, the 3 outer oblong, the 3 

 inner ovate: filaments short, glabrous: achenes 3-angled, glabrous. 



* In dry soil, Cimarron, Colorado. Summer. 



A beautiful species related to Eriogonum subreniforme ! , but more 



robust in habit. In place of the densely tomentose leaf-blades of 



E. subreniforme, E. trinervatum has glabrous leaf-surfaces, except a 



few scattered hairs on the lower side. The blades are never cor- 



date, as they are in its relative. The calices are at least twice the 



size, and the segments of the inner and outer series of entirely dif- 

 ferent shapes. 



The type was collected by Professor Greene, at Cimarron, 

 Colorado, August 25, 1896. 



*/ Eriogonum turbinatum. 



Annual, stoutish, acaulescent. Leaves basal ; blades subor- 

 bicular, variable in size, some about 1 cm. broad, others 3-4 

 cm. broad, all more or less apiculate at the apex, softly tomen- 

 tose on both sides, deeply cordate at the base ; petioles about 

 as long as the blades and tomentose like them : scapes erect, stout, 

 solitary or several together, 2-4 dm. tall, forking above, the 

 branches ascending: bracts scale-like: peduncles ascending or 

 spreading : involucres shorter than the peduncles,'turbinate, 2 mm. 

 long, glabrous ; segments usually 5, broadly ovate/obtuse, scarious- 

 margined, shorter than the tube : calices glabrous, pink, about 2 mm. 

 long; segments unequal, the 3 outer suborbicular, cordate, fila- 

 ments short, glabrous : achenes 3-angled, nearly 2 

 an obovoid base, beaked. 



In habit Eriogonum turbinatum resembles E. deflexum, though 

 more robust, while in floral characters it is allied to E. Hookeri. 

 The suborbicular outer calyx-segments readily separate it from 



mm 



