﻿COMPOSITE. 



417 



nsk.Ji.Dan 



^. ^j..^^^.,^^^ . v^.^xxv.. r^^.^^^^. pubescent when young, at length glabrous; 



racemose— A. borealis /?. Adamsii (leaves 3-5-cleft; peduncles hairy), 

 Schangini (cauline leaves entire and linear), Bess, in DC. I. c. A. spitha- 

 maea, Pursh ! jl. 2. p. 522. (At length glabrous throughout ; cauline and 

 floral leaves linear, entire!) 



North Wett^Coast": fhe^RoSjT ftlountalns ! ^and Oregon] Also^ Keweena 

 Point, Lake Superior, Dr. Houghton!— ^. span high. 

 4. A. Canadensis {MXchx.) : perennial (or biennialj), glabrous or canes- 



npper 3-7-divided, sessile ; the segments linear or Tinear-lanceolate ; heads 

 (rather large) hemispherical or subglobose, in paniculate racemes ; scales of 

 the involucre ovate or oval,* with scarious margins. — Michx.! jl. 2. p. 129 ; 

 Nutt.! gen. 2. p. 144. A. campestris, Pursh, Jl. 2. p. 521 (ex Nutt.) ; 

 Richards, appx. FravM. joiirn. ed. 2. p. 30. A. desertorum, Bess.! in 

 Hook. I. c. A commutata, Bess, in DC. I. c. (at least as to the American 

 plant.) A. peucedanifolia, Juss. herb. ; Bess. Drac. n. 33 ;" DC ! I.e. A. 

 Pacifica, mtt. in trans. Amer. phit. sac. («. ser.) 7. p. 399. 



Shores of the Great Lakes, from the St. Lawrence River to Lake Supe- 

 rior ! and. west to Missouri! Upper Platte ! and Oregon ! extendmg north to 

 Hudson's Bay ' and to the Arctic Circle.— Plant 1-2 or 3 feet high, erect or 

 ascending, considerably variable, if all the Western forms really belong to 

 this species; sometimes nearly glabrous except the young radical leaves ; but 

 frequently silky-canescent throughout ; the leaves somewhat rigid. The 

 beads also vary in size, but are larger than the following species. 

 ^ 5.^. cawc^ato (Michx.): biennia' ■ ' - •- -i 



nately divided ;^the segments ]in< a- 



inn^r ^ ■ jt- 2- P- ; 



Nutt. ! gen. 2. p. 144 ] Ell. sk. ± : : - . / ^ ( . . . 



Barren woods and sandy soil, Illinoi, I aad Mi.s.ouri, and from the coast 

 of New Hampshire • and New Jersey ! to Georgia ! Aug.-Sept.— Plant 2-6 

 feet high, strict. 



Wpinnatefy S?ided^^nouT(the pub 



fihform, spreading, entire or often 2-c>-paxieu , i.cau^ .v.., 

 a large open panicle ; involucre glabrous.-A. Santonica, Pursh, fl. 2. p. o 

 A. variabilis y ? Americana, Bess, in DC. prodr. 6. p. 94, Sf in Linn^a, 

 ^ miolli,' Lewis. {a\soherb. Michaux.) Sandy places between Fort Gib: 

 and Fort Smith, Arkansas, Dr. Engelmann '-^he specimen of Dr. En^ 

 mann consists of a young leafy stem, and a panicle of the former year. I 

 leaves of the former are not unlike those of A. caudata, but villous ; thost 

 latter are small, pinnately 3-5-divided, glabrous^; 



7- A.filifolia (Torr.): canescent; stems very numerous from a th 

 ^■oody base, paniculate at the summit; leaves much crowded or fascial 



^ upper 

 !S disposed 



