402 ORDER LXVIII. — C0MP0SITJ5. 



1. G. polycei'h'alum, (Mich.) Stem erect, branching to-R^ard the sum- 

 mit, white, tomentose. Leaves sessile, linear-lanceolate, slightly un- 

 dulate, glabrous above, tomentose and white beneath. Flowers in ter- 

 minal corymbs; involucre conical, leaflets oblong, tomentose at the 

 base. Seeds cylindrical glabrous ; pappus pilose. — White. %. Sept. 

 — Oct. Very common. 1 — 2 feet. 



2. G. purpu'reum, (L.) Stem erect or decumbent, simple, tomentose. 

 Leaves linear-spatulate, tomentose beneath, slightly mucronate, undu- 

 late. Floicers in sessile, axillary clusters ; involucre with the leaflets 

 ovate, glabrous, inner ones tinged with purple. ASe^o? oblong, scabrous. 

 r-Purple. U- March — May. Common. 1 — 12 inches. 



Gexus LXXIV.— ANTEXNA'RIA. Gart. 



(From the resemblance of the pappus to the antennce of insects.) 



Involucre many-leaved, irabricate ; scales oblong, scai-ioiis, 

 colored. Flowers dioecious. Seeds glabrous. PaiJims plu- 

 mose. Receptacle naked. 



1. A. MARGARrrA'cEA, (R. Br.) Stevi erect, branching near the sum 

 mit. Leaves linear-lanceolate, tapering, acute, tomentose beneath, 

 entire. Flowers in fastigiate corymbs ; involucre many-leaved, with 

 ovate, obtuse, white scales. — Yellow. 1i. Aug. — Sept. Mountains. 

 1—2 feet. 



2. A. plantagixifo'lia, (Hook.) Stem simple, with procumbent shoots, 

 white, tomentose. Radical leaves spatulate, ovate, entire, nerved, to- 

 mentose beneath ; caulin»- ones spatulate, lanceolate. Flowers in small, 

 terminal corymbs ; involucre with the inner scales long, obtuse, colored. 

 — Reddish-white. If. May — June. Car. and Geo. 



Sue-tribe VIIL— SENECIO'NE^. 



Heads homogamous or Leterogamous, discoid or radiate; 

 rays in a single series. Pappus capillary. 



Gkxls LXXV.— ERECH'TITES. Raf. 



(Probably named after Erectheus.) 



Heads many-flowered, discoid, with the marginal flowers pis- 

 tillate, the center ones perfect. Involucre cylindrical. Scales 

 in one series, linear. Receptacle naked. Achenia oblong, stri- 

 ate. Pappus setaceous, abundant. Herbaceous plants, with 

 alternate simple leaves. 



1. E. hieracifo'lia, (Raf.) {Senecio hieracifolius, L.) Stem erect, 

 p-ibescent, branching towaril the summit, succulent. Leaves alternate, 

 olilong, sessile, unequally notclietl, or pinnatifid, with acute lobes, gla- 

 brous. Flowers in compoun-i terminal panicles ; involucre with gla- 

 brous leaves, ventricose, wiih iire^ular setaceous It-aflels at the base. 

 Seeds slightly pubescent ; pajjv.i^ bristly. — Yellowish-white. 0. June 

 — Sept. Rich soils. Middle (r-u. 4 — % feet. Fire-vved. 



