CATALOGUE, . 163 
and produced above into a short, stout, inflexed awn (on either side). 
Chaff twice as long as the achenium; margins scarious and somewhat 
fimbriate or ciliate—On limestone rocks, Camp Bowie, Ariz. (452). 
Comparing the above with the original description, it will be discovered 
that there are some important differences; but as the specimens have been 
compared by Mr. Watson with the types in Cambridge, I cannot hesitate 
to assign them here.—Puave VIII. Branches, natural size. 1. Ray-flower. 
2. Disk-flower and subtending chaff. 3. Disk-corolla, style protruding. (1, 
2, and 3 magnified about 2 diameters.) 4. Style and stigma (20 diame- 
ters). 5. Mature achenium (15 diameters). 
ACTINOMERIS LoNnGirouia, Gray (Pl. Wright. 2, p. 89).—Stems erect, 
slender, terete, glabrous; leaves opposite, sub-opposite, or alternate, linear- 
lanceolate, sessile, acute, denticulate or entire, plainly reticulate, scabrous 
on upper surface and hispidly scabrous beneath; peduncles corymbose, 
naked, hispid, monocephalous; heads 1-2’ in diameter; involucre with 
scales in two-series, the outer of which are lanceolate and with attenuated 
tips, the inner are shorter and obtuse, resembling the chaff of the recep- 
tacle, which is hardly longer than the mature achenium; achenia oval, 
distinctly winged to the bottom, awnless or with a single short awn 
occasionally ; ligules yellow, sometimes 2-3-toothed, 6-10” long. Leaves 
sometimes 8° long and only 6” wide—Sanoita Valley, Southern Arizona, 
(608), and probably not far from the original locality whence it was taken 
by Mr. Wright. 
VERBESINA* ENCELIOIDES, Benth. & Hook. (Ximenesia encelioides, Cav., 
T. & G. FL. ii, 359.)—Annual, hoary-pubescent, green and almost smooth, 
branched from or near the base; leaves triangular-ovate or cordate, or 
sub-hastate, irregularly sinuate-dentate; upper petioles winged and dilated 
at base into a lobed auricle ; involucre with scales in 2-3 series, the outer 
lanceolate acute, pubescent, the inner shorter and smoother; rays numer- 
ous, cuneate-oblong, 4-7” long, 3-toothed at apex; achenia of the disk with 
a wide and strong wing; pappus (disk) of two short, weak awns—San 
* VeRBESINA, Linn.—Similar to the preceding genus (Actinomeris), except that the rays are fertile 
and the disk-achenia are more distinctly 2-winged and 2-awned. 
