42 PITTONIA. 
at which time the shrub, though very showy with its fine 
white foliage and dense clusters of bright straw-colored in- 
volucres, was not yet quite in flower. 
All the following Chrysothamni, which were placed as 
doubtful varieties of C. speciosus in the third column of 
Erythea, [am now more fully convinced deserve the rank 
of species. 
C. GNAPHALODES. C. speciosus, var. gnaphalodes, Greene, 
Eryth. iii. 110. 
C. LATISQUAMEUS. C. speciosus, var. latisquameus, Greene, 
l. c. 
hd LJ . . 
C. Arizonicus. C. speciosus, var. Arizonicus, Greene, l. c. 
C. PLATTENSIS. C. speciosus, var. Plattensis, Greene, l. c. 
111. 
The essential characters of all the above are given in the 
place cited, and need not be here repeated. 
GRINDELIA OXYLEPIS. Apparently annual (possibly bien- 
nial), erect, rather slender, about a foot high, simple and 
leafy up to the corymbose summit, or with a few divergent 
branches; stem glabrous, white and shining: leaves small 
and narrow, spatulate-oblong or oblanceolate, remotely ser- 
rulate, one-nerved, sessile by a broad auriculate-clasping 
base, or the auricles adnate to the stem: involucre low-hem- 
ispherical, $ inch broad or more, its bracts subulate-lanceo- 
late, their short green tips not spreading, the inner very 
acute, almost spinescent-tipped: rays few and broad: achenes 
small, truncate at both ends, from slightly compressed and 
with two angles, to somewhat triangular and quadrangular, 
the spaces between the angles somewhat striate; pappus 
bristles 2 to 4, twice the length of the achene, very slender 
for the genus and perfectly smooth. 
Moist plains near Chihuahua, Mexico, C. G. Pringle, 1886, 
