MuLGKDiuM. COMPOSITiE. 499 



/?. leaves somewhat sessile, or the upper cordate-clasping. — M. multiflorum, 

 DC. I. c. Sonchus racemosus, Lam. did., ex DC. S. muliiflorus, Desf. 

 cat. Par. (1829). p. 145. Galathenium multifloriim, Nutt. I. c. 



y. achenia very obscurely rostrate ; otherwise as in the ordinary plant. 



6. lower leaves with one or two narrow and often elongated lobes on each 

 side ; the terminal large and triangular-hastate, rarely hastately 3-lobed. 



In rather rich soil, Southern and Western States ! /?. Mountains of 

 the Southern States, Rafinesque ! Herb. Schweinilz ! <^'c. from Virginia ! 

 and Ohio! to Florida, Louisiana! and Texas! y. Indiana, Dr. Clapp! 

 6. Ohio, Mr. Lea! North Carolina, Mr. Curtis ! Tennessee, Rajincsque ! 

 July-Sept. — 2i or (2) ? Stem 3-6 feet high; the summit and loose 

 branches often purplish and a little glaucous. Lower leaves large, variable 

 in form ; the terminal lobe often smallest. Heads as large,- or rather larger 

 than in M. leucophceum. Involucre calyculate-imbricate, often tinged with 

 purple. Flowers blue. 



§ 2. Pappus tawny : corolla light Mice, or ochroleucous. — Agalma, DC. 



4. M. leucoplueum (DC! I.e.): glabrous or nearly so ; stem tall, very 

 leafy, paniculate at the summit; leaves irregularly subruncinate-pinnatifid 

 or pinnately parted, coarsely and unequally toothed, often sparsely ciliate 

 and hairy on the veins beneath ; the upi)ermost often undivided, lanceolate- 

 acuminate; heads in an ample compound panicle; peduncles racemose, 

 subulate-bracteolate; involucre glabrous; flowers bluish-white or ochroleu- 

 cous, usually changing to a pale dirty blue; achenia slightly rostrate. — 

 Sonchus alpinus, Linn. ! spec, as to spec. char, only; Smith! ic. pi. rar. t. 

 21. S. Canadensis, Linn. I. c, as to ihe habitat (the whole char, and descr. 

 relating to the European S. alpinus). S. spicatus, Lam. diet. 3. p. 401. 

 S. leucophasus, Willd. ! spec. 3. p. 1520 (excl. syn. Walt.) ; Pursh, Jl. 2. 

 p. 501; Desf.! cat. Par.; Hook.! Jl. Bor.-Am. 1. p. 293. S. acumi- 

 natus, Bigel. Ji. Bost. S. Fioridanus, Ait.! Kew. 3. p. 116; Darlingt.! 

 Jl. Cest. p. 445. S. pallidus, (Pursh?) Torr. ! compend. p. 279. Lactuca 

 Canadensis, &c., flore leucophteo, Tourn. inst. p. 474. L. Canadensis, Linn, 

 spec. 2. JJ. 796? Agathyrsus leucophaeus, Don; Beck, bat. p. 170. Mulge- 

 dium (Leucomela) leucophasum, Nutt.! in trans. Amer. phil. soc. I. c. p. 442. 



fS. integrifolia : leaves ohovate-oblong or lanceolate, undivided, or the 

 lower sparingly runcinate-pinnatifid, or incised. 



Low grounds, &c., Saskatchawan ! Newfoundland! Canada! Massa- 

 chusetts! and tliroughout the Northern and Western States! to the moun- 

 tains of Carolina ! Also Oregon, Dr. Scouler ! Aug.-Sept. — (!) Plant 

 3-12 feet high. Lower leaves often a foot long; the upper sessile, and 

 usually partly clasping. Heads small. Pappus dirty white or tawny- 

 brownish. — To the synonyms of this well-marked plant, perhaps we should 

 add that of Sonchus macrophyllus, of American writers. 



} Of uncertain origin. 



5. M. macrophyllum (DC. ! 1. c.) : stem strict, hispid at the summit ; 

 leaves ample, cordate at the base, somewhat lyrate, hairy beneath, the 

 terminal lobe very large and cordate; panicle loose, hispid; involucre 

 sparingly hispid. DC. — Sonchus macrophyllus, Willd.! spec. 3. ^;. 1519. 

 (excl. syn. Gronov.) " S. Canadensis, Frcel. in Ust. ann. 1. p. 29." S. 

 cordifolius, Desf. cat. Par. (1804) p. 87. 



" North America. — Root tuberous. Stem 4-7 feet high. Flowers blue, 

 as large as in the common Succory." Willd. — This well-marked species was 

 founded on specimens cultivated in the Berlin Botanic Garden ; the origin of 

 which is no-where recorded. We have seen nothing like it in this country, 



