COSMOS DIVERSIFOLIUS. 



( Various-leaved Cosmos.) 

 LINNEAN SYSTEM. NATURAL ORDER. 



SYNGENESIA FUUSTRANEA. COMPOSITE, TRIBE SENECIONIDE^li. 



GENERIC CHARACTER. 

 Cosmos (Cav.) Capitulum multiflorum radiatum, ligulis neutris. Involucrum duplex, 

 utruinque squamis 8-10 basi, plus minus concretis, apice acuminatis. Receptaculum planum, 

 paleaceum ; paleis membranaceis, in filum elongatum productis. Styli rami apice incrassati, bispidi, 

 in conum subulatum producti. Anther ce apice appendice scariosa cordata superati. Achenium 

 tetragonum, exalatum, rostratum, et interdum stipitatum, aristis 2-4 retrorsum piloso-scabris 

 deciduis coronatum. Herbce Americana; : annua? et perennes, glabra} aut vix pilosulse, elatae, 

 ramosse. Folia bipinnatisecta, lobis linearibus lanceolatis, saepius margine integerrimis. Capitula 

 ad apices ramorum longe nudorum, solitaria. Discus intense luteus. Radius versicolor. De Cand. 

 Prod. vol. v. p. 606. 



Capitulum many-flowered, rayed, rays neuter. Involucrum double, each containing 8.10 

 scales, more or less joined at the base, tapering towards the apex. Receptacle flat, chaffy ; chaff 

 membranaceous, protruding into an elongated thread. Branches of the style thickening at the 

 apex, hispid, elongating into an awl-shaped cone. Anthers attached to a scarious, heart-shaped 

 appendage at the apex. Seed four-sided, wingless, beaked, and sometimes stipitate, crowned 

 with two deciduous hooked rough awns. Plants natives of America, annual or perennial, 

 smooth, or scarcely hairy, tall, branched. Leaves bipinnately divided, lobes linear lanceolate, 

 oftentimes entire at the margin. Branches long, naked, each bearing at its apex a solitary 

 flower. Disc deep yellow. Ray of different colours. 



SPECIFIC CHARACTER. 

 C. diversifolius. Caule glabro • foliis petiolatis, bipinnatisectis, lobis subapiculatis, margine 

 scabris; petalis ovato-lanceolatis, apice dentatis vel integerrimis; involucris lanceolatis acutis ; 

 achenis glabris ; hristis duobus. 



Stem smooth; leaves petiolate, divided into double pinna divisions, sometimes with a point, 

 margin rough; petals ovate-lanceolate, toothed at the apex, or entire; involucre lanceolate, 

 acute ; achenia smooth ; awns two. 



Cosmos diversifolius. Otto. H. Berol. 



The plant from which our drawing was taken was sent with other rarities to 

 the Birmingham Botanic Garden, by Mr. Otto, of the Berlin Botanic Garden, 

 in the year 1835. It was then small, and flowered for the first time last year. 

 It is a showy plant, and will consequently be an acquisition to the ornamental 



b 2 



