8 Muhlenbergia, Volume 3 
A NEW CLOVER 
By P. B. KENNEDY AND LAURA F. MCDERMOTT 
V Trifolium orbiculatum 
Plant 1 to 2dm. high, perennial, not involucrate, stems. 
covered with short white pubescence, leaflets pubescent along 
the midrib or on one-half of the under side: root stout and long: 
stems erect: stipules at base longer and more linear than those 
above, all acute, adnate one-half to two-thirds their entire length, 
.§ to 1cm. broad and 1 to 1.5cm. long, lobes irregularly triden- 
tate near apex, lanceolate and very slightly villous: leaflets .6 to 
1.6cm. broad, and .8 to 2.5 cm. long, lower leaflets smaller, gen- 
erally broadest at the base, tapering toa cuspid apex; upper 
leaflets broadly oblong, rounding at the apex, some nearly or- 
bicular to deltoid; petioles of lower leaves 6 to 8 cm. long; up- 
per petioles 3 to 4cm. long: peduncles axillary, assurgent, 4 to 
1ocm. long: heads terminal or binate, completely reflexed in 
age by the deflexion of the pedicels: lemon yellow flowers on 
long pedicels 12 to 15 mm. long: calyx dull green, 7 to 9mm. 
long, 10-nerved, alternating nerves inconspicuous, outer surface 
covered with short white pubescence, teeth 4 to 5 min. long, 
slightly longer than the tube, very inconspicuously cross veined, 
with an occasional bifid tooth: vexillum 6 mm. broad, 17 mm. 
long, apex rounding, sometimes slightly emargimate, base ab- 
tuptly tapering; blade of wings nearly 1 cm. long, reflexed, tip 
rounding, base auricled; blade of keel 3 mm. broad, 5 mm. long, 
broader than the wing, beak obtuse: ovary villous-pubescent, 2- 
ovuled; pod 1-seeded; seed obcerdate. 
The type, which is deposited in the Nevada Agricultural 
Experiment Station herbarium, was collected at Thompson 
Falls, Montana, June 7, 1902, by J. W. Blankinship, no. 6. 
Its nearest ally is 7: /atzfolsum (Heok.) Greene, from which 
it differs in the shape and texture of the leaves, the leaves being 
decidedly thick as compared with 7. /atifolium. The long re- 
flexed pedicels of the flowers and the much larger wing as com- 
pared with 7. /atifolizum give it distinct specific characters. 
Nevada State University, Reno, Nevada. 
