March 7, 1913 U7 
Trifolium mercedense sp. nov. 
A densely pubescent large double-headed relative of 7: AZac- 
raer about a fot high, with erect stout stems from the base. 
The leaves subtending the heads and stipules are very long and 
narrow, the flowers larger and the calyx teeth twice or more 
times the length of the tube. The sheet taken as the type, in 
the herbariu:: of the Missouri Botanical Garden, was collected 
at Lake Merced, San Francisco, California, April 23, 1903, 7. P. 
Tracy 7822.’ Similar plants are San Bruno hills, San Mateo 
county, Elmer 4713, and C. P. Smith 7420; Lake Pilarcitos, San 
Mateo county, and Lake Earle, Del Norte county, Davy. 
Annual, 2 to 3dm. high, more or less branched from the 
base, densely pubescent throughout, stems terminating in a 
double-headed inflorescence subtended by large ovate stipules 
and long narrow leaflets: lowest leaflets orbiculate-obovate to 
cuneate-emarginate, remotely dentate, about 121nm. long, 8mui. 
wide; upper leaflets larger and narrower, broadly elliptical to 
oblanceolate, 15mm. long, coarsely dentate towards the apex; 
pedicels about 4cm. long; stipules narrow below to broadly 
ovate above, prominently veined, lobes of iower stipules with a 
long acumination 5 min. long, uppermost stipules broad, the 
undulate margins terminating in an abrupt triangular pomt: 
heads sessile or with a peduncle 3 or gimm. |. ng, large, ovate, 
15min. long and almost as wide: calyx tube 21mm_ long, teeth 
5mm. long: corolla extending 1 to 21mm. bevond the teeth; 
vexillum elliptical, 8mm. long, 2.6mm. .wide, very minutely 
erose-dentate at apex: ovary 2-ovuled: legume 3mm. long, 1.5 
mm. wide, hairy at apex, 1-seeded: seeds ovoid, light brown 
(larger than AZacraez), 21mm. long, devoid of markings. 
TRIFOLIUM CATALINAE Wats. 
T. Macraez forma catalinae McDermott 
A very low branching aunual, with sessile heads subtended 
by broad ovate-acuminate stipules and trifololate leaves with 
very narrow leaflets. Collected only on Santa Catalina island, 
California, by Brandegee, Trask, Fritchey and Grant. 
