﻿PLANTS FENDLERIANiE. 101 



f422. A. scaposa, NiitL, var. mutica : pappi paleis ohtusis muticis vcl in paucis 

 mucronatis corolla disci 2-3-plo brevioribus; foliis saepius integerrimis. (A. glabra, 

 Nutt.?) — Woodlands, from Pecos to San Miguel ; Aug. (466.) — The size and shape 

 of the palese of the pappus and the length of their awn vary considerably in A. scaposa, 

 both in Texan and North-Mexican specimens (from Buena Vista and Carrizitos, Dr. 

 Gregg), some of which exhibit the shorter paleae of the present variety; and "on the 

 Arkansas " Dr. Wislizenus gathered a closely related form, in which the paleaa are 

 slightly awned or awnless, and some of the leaves are lobed. The leaves become gla- 

 brous. I suspect that this will prove to be the A. glabra of Nuttall, but have no speci- 

 men for comparison. 



" 423. A. Richardsonii, NvM.; Tort. Sf Gray, Fl. 2. p. 381; var. floribunda. 

 Rocky hills, as well as plains and creek-bottoms, around Santa Fe; June, July. (460.) 

 — The stems are taller than in Richardson's plant from Carlton House (from a span to 

 a foot high), and branch copiously and repeatedly above, the branchlets terminated by 

 single heads, so as to form a broad fastigiate corymb. The somewhat woody caudex and 

 the base of the stems are woolly, as also in the original plant. The heads (as usually 

 happens when increased in number) are smaller than in the original specimens and in the 

 figure by Hooker, but I perceive no further difference. The involucre and the whole 

 characters of this plant are closely like those of Hymenoxys (Oxypappus) odorata, DC., 

 although in that plant the tube of the corolla is a little longer and the pappus denticulate. 

 De Candolle's second section of Hymenoxys must therefore be reduced to Actinella, 

 leaving in the former genus only the discoid (South American) species.* Ptilomeris, 



from the same district, kindly sent to me by Dr. Engelmann, came to hand while this sheet was undergoing 

 revision. These are much smaller than those of Fremont, measuring only half an inch from the root proper 

 to the top of the head, which is also smaller; but it is plainly a form of the same species.— Mr. Gordon also 

 gathered, on the sources of the Canadian, Actinella acaulis, and the species mentioned above as a taller state 

 of A. Torreyana, Nutt. The caudexes of the latter are rather slender, surmounted by slender scapes of four 

 or five inches long; the pappus in the ray is awnless, but in the disk short-awned. 



* Actinella odorata (Hymenoxys, DC), which appears to be an annual, was gathered by Col. 

 Emory in Western New Mexico; by Dr. Wislizenus at Bachimba, below Chihuahua; and by Dr. Gregg far- 

 ther south, at Bolson de Mapimi, where he states that it forms a " broadly conical bunch of two feet in height 

 and diameter." The local name is " Manzanilla Cimarron." — It is also in Mr. Gordon's collection, from 

 towards the sources of the Canadian. 



The collection of Dr. Wislizenus furnishes a new plant of this group, well distinguished from Actinella 

 and its allies by the small and fiat receptacle, and by a pappus of a dozen barbellulate bristles which are 

 membranaceously margined towards the base; from which character I have proposed for it the name of 



