SYNGENESIA.— SUPERFLUA. 287 



HAB. Banks of rivers. Aug. U. Stem 3—4 ft. 

 high ; leav. large ; fl. wh. ; anth. yell. 



C. atriplicifolia : stem herbaceous ; leaves petiolate, 

 smooth, glaucous beneath ; radical ones cordate, 

 dentate ; of the stem rhomboidal, subdentate on 

 each side; flowers corymbed, erect; calyx 5- 

 flowered. 



II AB. Banks of rivers. Aug. U . Stem 3—6 ft. 



high. ; pedunc. wh. ,• fl. sm., yell. 

 , C . reniformis : stem herbaceous; leaves petiolate. 

 smooth, hairy on the veins beneath ; radical ones 

 cordate, reniform, repandly dentate ; of the stem 

 oblong, dentate, cuneate and very entire at the 

 base ; corymb fastigiate; calyx many-flowered. 



HAB. Banks of rivers. July. lj. . Stem 5 — 7 ft. 

 high ; fl. yell.-wh. 



479. SPARGANOPHORUS. Composites. 



S. verticillatus : leaves linear, verticillate ; flowers 



few, terminal; pappus campanulate, 5-toothed. 

 HAB. Swamps. Aug. U . Stem simp.; I ft. high, 

 ■whorl. 6 — 8 leav. ; fl. pur p. 



SUPERFLUA. 



480. TANACETUM. Tansey. Composite. 



T. vulgare : leaves doubly pinnate, incisely serrate, 

 HAB. Old fields, &c. Aug. — Sept. H. Plant 

 odor. : fl. dense t yell. §. 



481. ARTEMISIA. Wormwood. Composite. 



I. A. canadensis : stem herbaceous, paniculate, mostly 

 erect; radical loaves subpinnate, slightly tomeo 

 tose; cauline ones pinnate, segments subsetaceous. 

 Incised, flat, nearly smooth ; flowers subglobose- 

 sessile ; scales of the calyx scarious. 

 HAB. Sandy shores. Aag. M . Stcm3—<\ ft. high, 



brownish ; fl. glomerate. 

 A. caudata : stem simple, herbaceous, much branch 

 ed, pyramidal ; radical and cauline leaves bipin 



nate, pubescent; upper ones pinnate; segment.- 



