33 



Itiiuging across the continent lioni the S. Atlantic stutcH to S. C'nli- 

 toniia, ni.d along tho Pacillc coast to Vancouver Island iMftroinij and 

 N'ootka Sound (Sroultr). 



Tho varieties microphyUiiH and Hciihcr depend entirely upon the vary- 

 ing character of the hairs, a character not to be relied upon This species 

 is evidently the Aiufricai) lepresenlativf of tin- widely distributed 

 D. Cin-old L. 



D. CAKor.v L., the Lulti\ atcd canot, has l)cc<)mc c\lciisi\cl\- 

 naluraUzccl. The stems arc biistly, leaves more coarsely rliviilecl 

 (the ultimate segments lanceolate and cuspidate), umbels with 

 more numerous and elongated rays and more prominent in- 

 volucies, and frull L;enerall\' laii^er. 



2. CAUCALIS Linn. (Jen. n. 381. -Mostly hispid annuals, 

 (ours) with pinnately dissected leaves (with very small segments), 

 and white flowers. The primary lateral ribs are pushed around 

 upon the commissural face, making a very narrow commissure, 

 while the adjoining secondary ribs become marginal. Closely 

 resembles Dauciis. 



1. C. microcarpa lIooU. iV Am. Bot. Beechey, 348. Erect, 

 slender, 3 to 15 inches high, nearly glabrous: leaves much dis- 

 sected, slightly hiopid : umbels at the ends of stem and branches, 

 very unecjually 3 to ()-raved, with iuNolucre of toliaceous tlivided 

 bracts, and involucels of entire or somewhat divided bractlets; rays 

 slender, 3 inches or less long; pedicels very unecjual: fruit oblong, 

 2 to 3 lines long, arned with rows of hooked prickles; the primary 

 lateral ribs near the margin of commissural face. (Fig. ~.) 



Washington Teiritory (Sukmlorf), Oregon [Ht'iidersoii). California, 

 and Arizona (Palmer, Pringlc). Fl. April and May. 



C. NODOSA Hudson. Decumbent, branching (jnly at base, 

 stems 1 or 2 feet long, retrorsely hispid: umbels naked, opjX)site 

 the leaves and nearly sessile, of 2 or 3 very short rays: fruit ovate- 

 oblong, a line long, entirely covered with rough tubercles or 

 usually with stout barbed or hooked prickles; the priniarv lateral 

 ribs near the very narrow commissure. (Fig. 3.) 



Native of Europe and N. Africa, introduced into Chili and Peru, and 

 thence into California; Texas [Hull); ballast ground, Port Eads, Louisiana 

 ^Langloin); near Baltimore (Foreman); ballast ground near Philadelphia 

 ^^farli)uhlle)■, near Ames, Iowa (Burgess). 



C. AxTiiKiscri^ Hudson, with 1 ;j-pinnale leaves and broad 



