26 Muhlenbergia, Volume 9 
seeds light brown mottled with dark brown, elliptical, 2mm. 
long, I mm. wide. 
The following collections have been placed under this spe- 
cies: Los Gatos, May, 1907, Kennedy (type) in herbarium of P. 
B. Kennedy, Heller 7330, 7476, between Mission San Jose and 
Livermore, Hed/er 7373; Stanford University, ddvams, April, 
1898, Baker 862, Gilroy, Elmer 4623. 
7. Hellert resembles 7. albopurpureum in general appear- 
ance, but has different leaves, calyx teeth and vexillum. 
TRIFOLIUM COLUMBINUM Greene 
7. olvaceum forma columbinum McDermott 
An erect annual about a foot high, simple or branching, 
with silvery white appressed hairs throughout, and rather long 
peduncled - heads, at first orbicular-ovate, but decidedly conical 
with age. The corollas are entirely concealed by the dense 
silky plumose silvery hairs on the calyx, giving the head a soft 
rather than harsh. appearance. In herbarium specimens the 
heads turn brown with age. 
Anuual, with or without ascending branches, appressed pu- 
bescent throughout: internodes 6 to 8cm. long: lower leaflets 
few and small, less than 1cm. long, oblanceolate-cuneate, den- 
tate, soon drying up; upper large, variable, 2cm. or less long, 
1cm or less wide, oval to oblanceolate, mostly obtuse, margins 
dentate to crenate; petioles about 4cm. long, uppermost very 
short; stipules prominently veined, lobes ovate-lanceolate to 
ovate, terminated by a short/acumination, entire or sparingly 
notched: peduncles 2 to 6cm. long: heads terminal or subtermi- 
nal, one or two terminating the branchés, globose when young, 
conical with age, 2.5 cm. long, 2 cm. wide, densely silky villous: 
calyx tube very short, 1mm. long, teeth 7mm. long, densely 
villous to the apex: corolla inconspicuous, extending only about 
half the length of the calyx teeth, white and purple; vexillum 
ovate-lanceolate, obtuse, 6mm. long, 2.8mm. wide (slightly in- 
flated in fruit), obtuse: ovary densely villous, 1-ovuled: style 
1.5mm. long: legume thin, membranous, striate, villous, 5mm. 
long, 2.1mm. wide, 1-seeded: seeds broadly ovoid, brown, 3mm. 
long, 1.6mm. wide, devoid of markings. 
