Malacothrix. composite. 487 



Dandelion. Flowers very numerous, pure white. Achenia dark brown. 

 Pappus as in the rest of the genus. 



5. M. commutata : herbaceous, glabrous ; stem erect, fistulous, striate, 

 leafy, racemose-corymbose at the summit ; leaves lanceolaie-linear, sessile, 

 acute, denticulate, those of the branches entire ; heads terminating the sim- 

 ple branches ; calyculate scales of the involucre subulate, squarrose-spread- 

 ino-, rather numerous; the proper scales very narrow and acute. — Hieracium? 

 Californicum, DC. ! prodr. 7. p. 235. "Sonchus? Californicus, Hook. Sf 

 Am. hot. Beechey, suppl. p. 361. Leucoseris Californica, Nutt. I.e. 



California, Douglas .'—Stem 1-2 feet high. Leaves not fleshy, much 

 narrower than in the preceding (to which it is very closely allied) ; the heads 

 smaller, with the ligules in the dried specimens purplish underneath. Ma- 

 ture achenia unknown : ovaries with no manifest border or crown at the 

 summit. Pappus as in the preceding. 



6. M. tenuifolia: sufFruticose, glabrous; stem erect, branching (2-3 feet 

 high); leaves sessile, laciniate-pinnatifid, with long and narrowly linear 

 lobes; the upper entire, filiform ; heads few, corymbose. JVmW.— Leucoseris 

 tenuifolia, Null. I. c. 



St. Barbara, California, on the mountains near the town.— The expanded 

 flowers and fruit not seen. Involucre as in M. saxatihs. but the scales 

 narrower and more acuminate. Nutiall. 



192. CREPIS. Linn. (excl. spec.) ; Manch ; DC. fi. Fr., Sfprodr. I. c. 



Heads several-many-flowered. Involucre mostly double; the inner or 

 proper scales in a single series ; the outer short and calyculate. Receptacle 

 somewhat fimbrillate-hairy, or naked. Achenia terete or slightly com- 

 pressed, mostly 10-30-striate, either columnar, narrowed at the apex, or 

 obscurely attenuate-rostrate. Pappus copious, capillary, white ; the bristles 

 somewhat scabrous, usually very soft and slender (in H. chondrilloides, 

 hyoseridifolia, pygmgea, &c., rather rigid and slightly thickened towards the 

 base!).— Branching herbs (natives of the northern hemisphere), with nearly 

 the involucre of Senecio. Leaves mostly toothed or pinnatifid. Flowers 

 yellow. 



§ 1. Involucre many-fiowered ; the exterior calyculate scales often loose : re- 

 ceptacle naked or somewhat hairy : achenia mostly 1Q-\Z- striate. — Eu- 

 CREPis, DC. (Crepidium & Psilochsena, Nutt.) 



1. C. runcinata : perennial ? radical leaves obovate-oblong or oblong-lan- 

 ceolate, narrowed at the base and somewhat petioled, hirsute-pubescent on 

 both sides, or at length glabrous, runcinate-toothed or somewhat incised, or 

 frequently entire on the same plant ; the cauline solitary or reduced to mere 

 linear bracts at the bifurcations of the corymbosely branched scape ; scales 

 of the pubescent involucre linear-lanceolate, acute, with scarious margins ; 

 achenia somewhat attenuated upwards, smooth, scarcely as long as the 

 pappus. — Hieracium runcinatum, James, in Long's exped. 1. p. 453 ; Torr. 

 in ann. lye. NewYork, 2. p. 209. Crepis biennis ,i. Hook. ! fl. Bor.-Am. 1. 

 p. 297, not of Linn. C biennis /3. ? Americana, DC. prodr. 7. p. 163. 

 Crepidium runcinatum, Nutt. ! in trans. Amer. phil. soc. I. c. p. 436. 



Saskatchawan, to the prairies of the Rocky Mountains, Drummond ! Lake 

 Huron, Dr. Todd. Borders of woods at Devil's Lake, Mr. Nicollet! 



