14 PITTONIA. 
M. PULCHELLA. Numerous scapes strongly decumbent, 3 to 
7 inches high, the leaves half as high, loosely pinnatisect, the 
segments narrowly linear, entire, the terminal one thrice the 
size of the others: involucres almost hemispherical: achenes 
oblong, 2 lines long, the outer minutely and densely white-silky ; 
the others chestnut-color, their thickish ribs either very deli- 
cately or almost obsoletely scabrous; pappus-palex very short, 
deltoid, densely white-villous, the whitish awn several times 
longer and of about the length of the achene, obscurely barbel- 
lulate. 
This, the most elegant of species as to the beauty of its achene 
and pappus, was collected by myself somewhat copiously, at a 
certain point among the hills east of the Livermore Valley, 
Alameda Co., Calif., 2 May, 1895, and is not otherwise known. 
It is allied to M. aphantocarpha, but is a smaller plant, well 
distinguished by ihe dense silkness of its minute pappus-pales. 
M. A$TRATA. Also related to M. aphantocarpha, about a foot 
high, the irregularly and falcately cut leaves 8 or 10 inches 
long; involucres large and many-flowered, hemispherical : 
achenes oblong-linear, 24 lines long, only one here and there 
among the outer series yillous-pubescent, all the others very light- 
colored, their ribs minutely but very sharply serrulate-spinu- 
lose: pappus of very small ovate acute dark-colored glabrous or 
merely scabrulous palex, and long tawny awn, the whole quite 
notably longer than the achene. : 
This is also from the hills east of Livermore, near Midway, 
collected by myself, 3 May, 1895. The palea is here much 
more elongated than in M. aphantocarpha, and is rather far 
from being plane, though not involute as in the other group. 
True M. aphantocarpha occurs in this same region, and of luxu” 
riant growth. 
M. sTENOCARPHA. Foliage slenderly and almost pectinately 
pinnatifid, the segments very narrowly linear, mostly straight 
and nearly divaricate, the leaf as a whole quite surpassing the 
