168 PITTONIA. 
of the involucre not glandular, only sparingly hirsute: rays 
8 or 10, yellow; chaff of the receptacle scarious, disconnected 
and in several series: ray-achenes compressed-trigonous, 
nearly enclosed by their bracts; central convex portion of 
the receptacle rather strongly fimbriate- hirsute. 
Foothills of the Sierra Nevada, California. 
BrrPHARIPAPPUS Neo-Mrxicanus. Layia Neo-Mexicana, 
Gray, Pl. Wright, ii. 98 (1853). This plant, which Dr. Gray 
did well in distinguishing from the far-northwestern B. 
glandulosus, he afterwards reduced to the species last-named. 
But all the characters originally attributed to the southeast- 
ern plant hold good; and there are others not yet indicated. ~ 
The plant is of a different mode of growth, never appearing 
diffusely branched, but always with a simple stem which 
bears at summit one or more peduncled large heads; the 
ray-corollas being of more than twice the size of those of 
B. glandulosus. 
BLEPHARIPAPPUS NUDATUS. Freely branching from the 
base, the branches slender, sparsely leafy, 6 to 12 inches 
high ; all the leaves, both of the radical rosulate tuft and of 
the branches, oblong-lanceolate and quite entire, scabrous, 
especially on the margins, but these and all other parts of 
the plant devoid of the usual glands: beads small; rays 
white, rather short and inconspicuous ; disk-corollas bristly- 
hairy at summit: achenes with scattered and very closely 
appressed hairs: pappus of about 10 stout scabrous white 
awns (hardly to be called pales) two-thirds as long as the 
achene, their basal villous hairs copious and elongated, only 
a third shorter than the awns themselves. 
Mountains of the upper part of the peninsula of Lower 
California, C. R. Oreutt, 1884; mistakenly distributed for 
B. glandulosus. 
CHANACTIS FLORIBUNDA. Annual, erect, 8 to 12 inches 
high, compactly and fastigiately branched from the base, 
