PLANTEZ FENDLERIANE. 101 
$422. A. scaposa, Nutt, var. mutica: pappi paleis obtusis muticis vel in paucis 
mucronatis corolla disci 2—3-plo brevioribus; foliis seepius integerrimis. (A. glabra, 
Nutt. ?) — Woodlands, from Pecos to San Miguel; Aug. (466.) — The size and shape 
of the palez 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 pale of the present variety; and “on the 
Arkansas ” Dr. Wislizenus gathered a closely related form, in which the palew 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. Ricnarpsonu, Nutt.; Torr. & Gray, Fl. 2. p. 381; var. FLORIBUNDA. 
Rocky hills, as well as plains and creek-bottoms, around Santa Fé; 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, Nuit. 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 oporata (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 flat 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 
