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1. T.pepens L. All peduncles axillary, 
longer than the leaf. Petals white.—2¢. Com- 
mon. Summer. 
2, 'T. Macrat Hook. & Arn. Heads notin- 
volucrate; flowers sessile; petals dark purple. 
©. Marin County. Spring. 
3. T. crniatum Nutt? Heads not involu- 
crate; flowers shortly pedicillate; calyx teeth 
lanceolate, rigid, ciliate at the bottom; petals 
white or purplish.—@. Common. Spring. 
4, T. cRacmentum Torr. & Gray. Heads 
not involucrate; flowers shortly pedicillate; 
leaflets obovate; petal rose-color.—Common. 
Spring. 
5. T. piripum Gray. Heads not involu- 
crate; flowers shortly pedicillate; leaflets bifid 
at the apex; corolla rose-color.— ©. Common. 
Spring. 
6. T. mvotucratum Willd. Heads involu- 
crate; involucre herbaceous, deeply lobed, the 
lobes deeply dentate; corolla not becoming in- 
flated; legume more than 4-ovulate; petals rose- 
color.—@©. Common. Spring. 
7. QT. vripentatum Lindl. Heads involu- 
crate; involucre herbaceous, deeply lobed, the 
lobes deeply dentate; corolla not becoming in- 
flated; legume 1-2-ovulate; calyx teeth rigid, 
abruptly narrowed into a spinulose apex; petals 
considerably exceeding the calyx, purple with 
paler or white tips—@©. Common. Spring 
