SYNGENESIA. SUPERFLUA. 167 



Radial florets oblonc^. Bcceptacle naked, rap- 

 pus p.ilcaccous, minute, 5 to 8-Ieavcd, leaflets 

 obtuse, awnless. 



Herbaceous; leaves alternate? or opposite, palmately 

 pinna* ifid, tomentose or villous; peduncles l-flowered, di- 

 chotonial and terminal. 



Species. 1. T. lauaUim. Actinella lanata^ Ph. 2. p. 560. 

 Every where whitely and lanuginously tomentose; leaves 

 alternate, those of the stem subpalmately pinnatifid, of the 

 branches linear and entire; peduncle elong-ated, the sum- 

 mit thicker. IIab. Near the sources of Columbia river. 

 M. Lewis. Flowering in June and July. v. s. in Herb. 

 Lambert. — Perennial; stem erect and branching, about a 

 foot high. Leaves alternate? (perhaps not constantly so) 

 those of the stem elongated, narrow at the base, dilated 

 and divided pinnatifidly above, divisions liguiate and 

 somewhat toothed, uppermost entire. Calix oblong-cy- 

 lindric, composed of a simple series of leaves, about 12 

 to 14, linear-lanceolate, actite. Rays about the same num- 

 ]jer, oblong, bidentate. Pappus 5 to 8-leaved. Seed pen- 

 tangular? glabrous, attenuated downwards. — The flowers 

 are bright yellow, und in form and character strongly re- 

 semble those of the genus Tagetes. 



2. * oppositifoUum. Decumbent and much branched, 

 ■ {shortly and canescently pubescen'; leaves opposite, all 

 palmately trifid, segments liguiate, simple, or divaricately 

 subdivided; peduncle filiform, mostly dichotomal, scarcely 

 longer than the leaves. Hab. On denudated sterile hills, 

 near Fort Mandan; abundant. Flowering in July and 

 August. — Perennial? stem diituse, 6 to 12 inches lugh, 

 grooved; oppositely blanched. Leaves pet.olate, ti-itid, 

 canescent, pubescence very short, sec>;ments about an inch 

 long, thiclcish and opaque, the lateral ones mostly bifid, 

 the central one often trifid, all somewhat obtuse and li- 

 near Peduncle slender, 1 to 2 inches Ion,,, a liule tliick- 

 er under the calix. Calix oblong-cylindric, s.mple, leaf- 

 lets 5 to 8, oblong-ovate, erect; rays about the same num- 

 ber, very short. Pappus paleaceous, 5 to 8-leaved, mi- 

 r.ute, leaflets partly obtuse and somewhat lacerate. Seed 

 nearly smooth, rather long, and attenuated downwards, 

 or inversely conic. Keceptacle small and naked. — The 

 whole of this plant is very sensibly bitter and destitute of 

 aroma. 



There is nothing in the habit of this genus .vhich would 

 lead us to suppose it allied to Actindla o. Ju-^sieu, and 

 scarcely more ia the generic character. In Actinella the 



