(257) 



1. T. BEPENS L. All peduncles axillary, 

 longer than the leaf. Petals white. If. Com- 

 mon. Summer. 



2. T. MACRAE Hook. & Arn. Heads not iii- 

 volucrate; flowers sessile; petals dark purple. 

 . Marin County. Spring. 



3. T. CILIATUM Nutt- Heads not involu- 

 crate; flowers shortly pedicillate; calyx teeth 

 lanceolate, rigid, ciliate at the bottom; petals 

 white or purplish. 0. Common. Spring. 



4. T. GBACILENTUM Torr. & Gray. Heads 

 not involucrate; flowers shortly pedicillate; 

 leaflets obovate; petal rose-color. Common. 

 Spring. 



5. T. BIFIDUM Gray. Heads not involu- 

 crate ; flowers shortly pedicillate ; leaflets bifid 

 at the apex; corolla rose-color. 0. Common. 

 Spring. 



6. T. INVOLUCBATUM 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. 0. Common. Spring. 



7. T. TBIDENTATUM 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 aspinulose apex; petals 

 considerably exceeding the calyx, purple with 

 paler or white tips. 0. Common. Spring 



