'156 POLYGONE.E. 



9. C. diffusa, Beuth. PI. Hartw. 333 (181:9). Near the last, but 

 slender, the branches not leafy, the whole plant much smaller : leaves 

 all at the very base of the stem, oblong or spatulate : involucres 1 line 

 long, unequally toothed, the longer teeth equalling the tube, uncinate, 

 the scarious margins broad and petaloid, pinkish : perianth shortly 

 cleft ; segments obtuse, nearly equal, the inner somewhat narrower ; 

 filaments inserted near the base. — Sandy plains near Monterey, Hartwfg, 

 also near the seashore at the same place, and in the Santa Cruz Moun- 

 tains, Parry: and Dr. Parry considered the plant a variety of C. pangenx. 



10. C. Audersouii, Parry. Proc. Davenp. Acad. v. 175 (1889). Branches 

 a span long : leaves mostly radical, oblanceolate, narrowed to a winged 

 petiole ; foliaceous bracts occasional at the lower nodes ; the loosely 

 cymose inflorescence acerose-bracted : involucres sharply ribbed, the 

 intervals somewhat corrugated ; longer segments equalling the tube, the 

 alternate ones half as long, all scarious-dilated at base and uncinate- 

 tipped : perianth narrowly obconic, with short spatulate equal entire 

 apiculate lobes. Scott's Valley, near Santa Cruz, Anderson; also on 

 Ben Lomond, Parry. July. 



++ •»-+ Lobes of involucre vilJioul scarw^is margins. 



11. C. cuspidata, Wats. Proc. Am. Acad. xvii. 379 (1882). Habit of 

 ('. pnngens, leafy-bracted : leaves narrowly oblanceolate, 1 in. long; 

 floral bracts acerose : involucres loosely cymose-clustered, 1 line long, 

 6-toothed, without scarious margins, the alternate teeth shorter, all 

 armed with hooked awns : perianth subsessile, pinkish ; lobes nearly 

 equal, oblong, acutish, the strong nerve excurrent as a short cusp. — This 

 was regarded by Dr. Parry as only a common form of C. pungens; but 

 by Dr. Watson's description, it should be very distinct. Sandy hills at 

 San Francisco, Marcus Jones, Dr. Parry. 



12. C. Cleveland!, Parry, Proc. Davenp. Acad. v. 62 (1884). Prostrate 

 or assurgent, the rather few branches 2—8 in. long, villous-pubescent : 

 leaves mostly radical, broadly oblanceolate, narrowed to a rather long 

 and slender petiole : involucres soft-pubescent, the triquetrous tube 

 contracted above ; se'gments very uueqiial, 3 as long as the tube, the 

 other 3 scarcely half as long, all uncinate : perianth shortly cleft ; outer 

 segments broadly ovate, erose, refuse or emarginate, the inner narrow 

 and lacerate : stamens 3 ; anthers orbicular. A well marked species, 

 common among the wooded hills of St)nonia and Lake counties, in 

 clayey soil. June — Sept. 



13. C. uiiiaristata, T. & G. Proc. Am. Acad. viii. 195 ( 1870). Prostrate 

 or assurgent, 3—8 in. broad, cinereous with a soft pubescence : lowest 

 leaves spathulate, obtuse, pilose beneath ; cauline narrow, recurved and 

 pungent : involucre with short and sharply angular tube, and stout 



