LEGUMINOS^. 31 



side. Var. soabrelluiii (T. scabrellum, Greene, Pitt i. 159), a slender 

 plant with lou^'- almost filiform peduncles and broad truncate cuspidate 

 leaflets, has a sparse scabrous pubescence upon its stalklets and growing 

 parts. — The type of this common species, sparingly leafy, the leaflets 

 linear, the stems firmly erect and the whole herbage purplish, belongs to 

 the seaboard, where it abounds in clayey soils, both on hills and plains. 

 In the Sacramento valley the plant i.s paler, weaker and less erect, but 

 larger and with broader leaflets : the flowers paler and the calyx-segments 

 mostly simple. The var. scabielluni is from the j^lains of the upper San 

 Joaquin, and has marks enough for a species, if they were constant. But 

 in the region of the lower San Joaquin, and in Livermore valley it appears 

 to be confluent with T. (ridentatum. A constant mark of the species in 

 all its forms, as distinguished from the next two, is the 10-nerved calyx 

 without smaller intervening striae. Mar, — May. 



30. T. obtusillornin, Hook. Ic. PI. iii. t. 281 and Bot Beech. 331 (1840). 

 8tout, erect, 1 — 3 ft. high, the herbage bright green, sparsely short-hairy 

 uijder a lens ; the inflorescence and growing parts somewhat resinous- 

 glandular : stipules setaceously lacerate, broad and spreading, in age 

 reflexed ; leaflets elliptic-lanceolate, 1 — IJo in. long, spinulose-serrate : 

 heads more than 1 in. broad, on long stoutish peduncles : calyx-tube 

 oblong-campanulate, I4 in. long, with 10 prominent and as many lesser 

 nerves, these branching and forming reticulations alx)ve ; teeth subulate- 

 epinose, entire : corolla % in. long, lilac-purple with dark centre. — 

 •Common on clayey hill-sides and stream banks in the open country along 

 the base of the Mt. Diablo Range, and foot-hills of the Sierra ; originally 

 from Monterey, Iwttglas ; extending northward to Oregon, IloveU. An 

 exceedingly well marked species, readily known by its great size and more 

 ■or less gummy heads of large flowers, 20-nerved calyx, etc. May. 



31. T, rosciduin. Erect, with ascending branches, stout, 1—2 ft. high, 

 stems flexuous, purple, leaves deep dtiU green, soft-pubescent throughout 

 and very clammy, not at all resinous : stipules spreading or reflexed, 

 setaceously fimbriate : leaflets ( often 5 ) 1 in. long, linear-lanceolate, 

 pectinately setulose : heads as in the preceding (though not glandiilar), 

 calyx the same ; corolla white, with dark red-purple centre. — Plentiful 

 in the foot-hills of the Sierra, on shaded northward slopes and along 

 streams, near Jackson, Amador Co., and southward to San Bernardino 

 Co., Parish. A remarkable species on account of its pubescence and 

 clamminess ; the whole herbage, even at noon of the driest day, feeling 

 as if wet with dew. But for its conspicuous pubescence it might pass in 

 the herbarium for a form of T. ohhtsijiomin ; but it is most distinct from 

 that and every other recognized species of clover. June. 



32. T. inouauthuin, Gray, Proc. Am. Acad. vi. 523 (1865) : T. viulli- 

 ■/■aule, Jones, Bull. Torr. Club, ix. 31 (1882). Perennial, dwarf, 1 — 6 in. 



