﻿Greene : New Compositae from New Mexico 121 



v Erigeron arenarius. 



Annual, slender, weak and diffusely branching from the base, 

 the branches i° long or less; herbage minutely and softly 



pubescent: leaves mostly i' long, spatulate-linear, obtuse: 

 heads terminating slender pedunculiform sparingly leafy-bracted 

 branchlets ; involucre 2" or 2j4 N high, the equal bracts roughly 

 hirsutulous : rays 40 or more, not very narrow, white to lavender : 

 achenes elongated and linear, little compressed ; pappus of some 

 20 very delicate bristles deciduous from a callous ring. 



some forms of E. divergent 

 the pappus perfectly simple. 



June 17 (no. 23). With 



hut more allied to E. I 



'E 



rigeron formosissimus. 



Perennial, somewhat tufted, i°-i^° high, the stems erect or 

 at base slightly decumbent : basal leaves oblanceolate, obtuse, 

 entire, i -nerved, 2^-5' long including the long-winged petiole, 

 green and glabrous on both sides, ciliolate-margined ; those of the 

 stem 1 ' long or more, oblong-lanceolate, acute, sessile : stem 

 somewhat hirsute-pubescent, ending in one or two very large 

 heads: involucre low-hemispherical, 3^' broad, the biserial equal 



"L .„ _j -.1 ... • « >.i i*iil 1 . _„^ 



bracts with spreading green tips and with little pubescence : rays 

 100 or more, narrow, almost }(' long, from light rose-color to 

 deep purple. [Plate 332.] 



The type from an altitude of 10000 feet on Sierra Blanca 

 Peak of the White Mountains, Aug. 16 (no. 352). A taller stalk 

 of the same was collected by the present writer, on northward 

 slopes of the Pinos Altos Mountains in September, 1880, and 

 distributed for A. glabellas, a species to which this is certainly 

 allied. The expanded heads are nearly two inch i in diameter. 

 In the far northern species, E. glabellas, they are barely Ty{ of an 

 inch, and the rays are much narrower, white, or pale ; the heads 

 being several and corymbose. 



WOOTONIA gen. nov. 



Opposite-leaved and dlchotomously branched annual, of the 

 Coreopsidcae. Heads solitary in all the forks. Involucre s.mpl 

 of a series of distinct and equal oblong erect bracts ; or occasion- 

 ally with vestiges of an outer involucre in the form Of one or more 



narrow and spreading bracelets. Kays none. Disk-flowers 5 1 



6, minute. Achenes linear, compressed but nei r thin, w.tn two 



