10 Muhlenbergia, Volume g 
by the time the second and third series are in bloom. In this 
manner the head is in flower for a considerable time (three 
weeks). The shape of the head therefore varies according to the 
stage of growth, a fully developed head with all the flowers tmna- 
tured and faded being distinctly conical. 
Annual, 4dm. high, more or less branched, erect, somewhat 
rigid, pilose throughout: leaflets obovate to oblanceolate on short 
petioles, coarsely dentate, about 25 mm. long, 12 mm. wide, the 
lower leaves few on rather long petioles of about 4 cim., leaflets 
smaller, cuneate, emarginate, dentate; stipules broadly and 
shortly ovate-acuminate, mostly entire, nerved: mature pedun- 
cles 8 to ro cin. long: heads about 22 mm. long, 17 mm. wide, 
ovate-conical, villous: calyx tube obconical, about 3 mi. long, 
prominently 20-nerved, teeth 71mm. long: corolla extending 
about 2.5mm. beyond the calyx teeth (in fruit twisted and 
shrunken and often appearing as if shorter than the calyx teeth); 
vexillum obovate-lanceolate, with a small mucron and minute 
irregular dentations at apex, 12mm. long, 4mm. wide, purple 
at base, shading to white; wings and keel purple and white: 
ovary 2.5imin. long, one ovuled: style 5mm. long: legume 4mm. 
long, 1.5mm. wide, one seeded, glabrous, striate, elliptical, mem- 
branaceous: seeds light brown, 2.3 mm. long, elliptical, mottled, 
but sometimes only faintly so. 
The following specimens from California have been exam- 
ined: 
Contra Costa county: Antioch, Mrs. Brandegee, May, 1907 
(compared at Kew with the type and found to be typical); hills 
three miles south of Antioch, Hfe/ler 8903; Antioch, Davy 949; 
Byron, Baker 2797; cultivated at Reno from Antioch seed, Ken- 
nedy, 1910. 
Alameda county: Between Mission San Jose and Liver- 
more, /leller 7376. 
A series of sheets from the north do not conform exactly to 
the type, all having smaller leaves and heads, and less conspicu- 
ous flowers. When better known in the field this northern form 
inay show specific differences. The specimens are as follows: 
Oregon; Near Nustucker river, R. W. Summers, 1876; 
