586 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



COTULA. 



1. Cotula coronopifolia L. Sp. PI. 2: 892. 1753. 



Type L(X'.vi.ity: '" In Aot!iiopia." 



Range: Wii-s'.iiii f. >n to California, introduood from South Africa. 



Speci-men.s EXAMINE!): IIo(|uia!n, L'tnh 122:5: Port Anj;ol.'i, P/'/vr, Spptombor 1, 1895; 

 Gran' in ISSH; Taconi-i, Fleft 127; CharhMton, Pipir, July 21, \HYk S;)u!.hb(>nd, Spillimn. 



Tiiis plant has hcon a!>iinclan.' in brackish marshes alon,;^ the scacoivst of Washington for 

 twenty yeai-s or more, and givos ono the impnvssion of In'inw native. 



TANACETUM. 



1. Tanacetum. huronense Xutt. (Jen. 2: 141. ISIS. 



Tanacetum ihuiflnKii IKl I'rod. 6: 128. \KVt. 



TSte ixxAi.iTv: '■ litikc Ilunm near Michilimuokinark." 



IIance: Washiniion an! Ore^o?! on the .scaroast, the (ireat Tmkc's, Main(> and New 

 Brunswick. 



Si'KC'i.MEN.s examined: drays \\a\\h^v, lAimh 1217; without io(;ality, Cooper; IKvaeo, 

 PijM'r. 



ZoNAi, ni.sTRiiuTioN: Humid Transition. 



Tanacetum vuuiAKE Ij., (he garden tansy, is found <M-ca.sionally a.s an e.seape from 

 gardens. 



ARTEMISIA. SAGEnRUHii. Wormwood. 



IIerl)aeeous or sufTrute.so^'nt. 



Disk flowers p««rfect hut .sterile: marginal flowers pistillate. 



Ijeaves linear, mostly en( ire, glabrous 1 . A. (hvcuncvloidea. 



I>'aves pinnately or hipinnately divided into narrow 

 1o1k*s. 



Heads very numerous, small, greenish 2. A. cnnadfnsis. 



H(>ads rath<>r few, large, brownish; alpine W. A. horealis. 



Disk flowers jX'rfjM-f , fertile; nundinal flowers pistillate. ' 

 Iteeeptaele pilose. 



Ijeave.s silvery pul)es<'ent, the short .segments fdi- 



form 4. A. friffida. 



Ijeaves not silvery, the .segments oblong or oblong- 

 linear 17. A. nhsinthium. 



Receptacle not pilose. 



Jjeaves green, finely dissected into linear segments. 



Biennial; heads small, in leafy panicles 5. yl. bieMnix. 



Perennial ; heads few, large 6. A. longepeduncvlata. 



Leaves white beneath, not finely dis.scCted. 

 Involucre persistently white tomentosc. 



Leaves not glandular puncticulatc 7 . A. ludmnciana. 



Leaves puncticulatc with scattered gland- 

 ular dots 8. A. aiomifera. 



Involucre green, glabrous or pubescent; not 

 tomentose. 



Heads cainpanulate. 



Leaves pinnately or bipinnatcly di- 

 vided into narrow segments 10. yi. ducolor.. 



Leaves lanceolate-oblong, entire or 

 more or loss laciniately cleft. 



Stem about 1 m. high; leaves 

 persistently tomentose be- 

 neath; involucre green 9. ^. tUesii. 



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