586 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



COTULA. 



1. Cotiila coronopifoUa L. Sp. PI. 2: S92. 17.53. 



Type locality: ' ■ In AL-thiopia." 



Range: Wasliin ;Con to California, introduced from South Africa. 



Specimens examined: Hoquia:Ti, Lanh 1223; Port Anjol o ., Finer, September 1, 1895; 

 Grant m\SS9; Tacoma, F/e« 127; C:ia:-l33ton, Pt;73r, July 21, 18)3; Soathhend, Spillinan. 



This plant has been abundant in brackish marshes along the seacoast of Washington for 

 twenty years or more, and gives one the impression of being native. 



TANACETUM. 



1. Tanacetura huronense Nutt. Gen. 2: 141. 1818. 



Taiiacetumd>u.:/Iasil DC. Prod. 6: 128. 1837. 



Ty'PE locality: "Lake Huron near Michiliinackinack." 



Range: Wa^hin^ton an 1 Oregon on the seacoast, tltc Great Lakes, Maine and New 

 Brunswick. 



Specimens examined: Grays Harlior, Lnmh 1217; without locality, C'oopcr; llwaco, 

 Piper. 



Zonal distribution: Humid Transition. 



Tanacetum vulgare L., tlie garden tansy, is found occasionallv as an escape from 

 gardens. 



ARTEMISIA. Sagebrush. Wormwood. 



Herbaceous or suffrutescent. 



Disk flowers perfect but sterile; marginal flowers pistillate. 



Leaves linear, mostly entire, glabrous 1 . A. draciinciiloides. 



Leaves pinnately or bipinnately divided into narrow 

 lobes. 



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



Pleads rather few, large, brownish; alpine 3. A. borealis. 



Disk flowers perfect, fertile; marginal flowers pistillate. 

 Receptacle pilose. 



Leaves silvery pubescent, the sliort segments lili- 



fo:m 4. A. frigida. 



Leaves not silvery, the segments oblong or oblong- 

 linear 17. A. ah.'^infhiinn. 



Receptacle not pilose. 



Jjcaves green, finely dissected into linear segments. 



Biennial; heads small, in leafy panicles 5. A. biennis. 



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



Leaves white beneath, not finely dissected. 

 Livolucre persistently white tomentose. 



Leaves not glandular puncticulate 7. A. Judonciana. 



Leaves puncticulate with scattered gland- 

 ular dots 8. A. atomifera. 



Involucre green, glabrous oi' pubescent; not 

 tomentose. 



Heads campanulate. 



Leaves pinnately or bipinnately di- 

 vided into narrow segments 10. ^. discolor. 



Leaves lanceolate-oblong, entire or 

 more or le.ss laciniately cleft. 



Stem about 1 m. high; leaves 

 persistently tomentose be- 

 neath; involucre green 9. ^. tilesii. 



