OXDKR 70. COMPOSITE. 177 



per often alternate, ni ystly tripli-veined. Rays yellow ; disk yellow or pur- 

 pie: in late Summer and Autumn. Figs. 74, 261, 433-4. 



HELIANTHELLA (T. & G.) Pap. persistent. Lvs. scattered, 1-vehied Noe 24,25 



3 HEi,iANTHUS7>r0pr. Pappus deciduous. Ln.wer leaves opposite.. .(*) 



* Disk (its corollas and pales) dark purple, mostly convex... (a) 



a Herbs annual. Leaves chiefly alternate NOB. 1, 2 



a Herbs perennial. Leaves opposite. e Scales acuminate Nos. 3 5 



Sc. obtuse or barely acute. .Nos. 6, 7 



Disk (its corollas and pale?) yellow. . .(6) 



ft Leaves chiefly alternate and feather-veined Nos. 8- -11 



b Leaves chiefly opposite and 3-veined or tripli-veined. . .(c) 



c Scales erect, closely imbricated./ Plants green, rough Nos. 12, 13 



f Plants whitish, downy.. .Nos. 14, 15 

 c Scales loosely spreading. Heads large, 9-15-rayed. . .(<X) 



d Scales lance-linear, longer than disk. Leaves thin Nos. 16, 17 



d Scalet 'ance-ovate. as long as the disk. Leaves thick.. .Nos. IS 21 

 c Scales looseij spreading. Heads small, 5-8-rayed Nos. 22, 23 



1 H. anmiti* L. Great Sunflower. Erect, stout ; Ivp. all cordate, only the lowest op- 



posite ; hds. very large (6 120, nodding ; fr. glabrous. Gardens and fields. 2 lOf. S. 

 America. A variety with the flowers all ligulate is sometimes found in gardens. 



2 M. deblliK N. Decumbent, slender: leaves mostly alternate, ovate, serrulate, petio- 



la*e : lids, smnll ; scales with slender points ; fr. pubescent. Shores, E. Fla. to La. l-2f. 



3 H. Radula T. & G. Hirsute, simple, hearing a single head; Ivs. rounclish-obovate 



or <v.<e. obtuse : scales and pales lanceolate, acuminate, erect ; rays 7 10. rarely 0. 

 V Barrens, Ga. Fla. Ala. 1 3f. Often growing in clusters. Hds. near 1'. Aug. Sept. 



4 H. heteroplijfllim N. Slightly hispid, slender, bearing a single head ; Ivs. entire, 



the lower oval, upper linear-lanceolate : scales acuminate, erect, ciliate ; pales acute : 

 rays 12 IS. ii S. 1 1'f. Heads 6" diam., rays spreading 2f. Aug. Sept. 



5 H. aiigiiBtifoIliis L. Erect, slender, scabrous or hispid; Ivs. lance-linear, taper- 



ing to a long point, I-veined. rigid: hoads few; scales lance-linear, the long point 

 spreading : pales linear, 3-toothed. Dry soils. N. J., Ky. and S. 2 3f. Aug. Oct. 



6 H. rigldiia Desf. Rigid, subsimple : Ivs. lanceolate, pointed, rough both sides ; hds. 



few ; scales ovate, acute, short ; rays 12 20. Priries, Wis. Mo. to La. 2 3f. 



7 H. sitrorubeiis L. Ped. few, long, leafless; st. hirsute below; Ivs. ovate or oval. 



obtusish. on winged petioles ; sc. oblong, obtuse, 3-veined. Dry soils. S. 2 If. 



8 H. gijffktitens L. Rough or hairy ; Ivs. lanceolate, serrate, pointed, on ciliate, wing 



ed petioles : scales lance-linear, ciliate : rays 12 20 ; pappus of 2 short, fringed scales 

 Can. to Car. and Ky. 4 lOf. Varies with the leaves mostly opposite. 



9 II tomeiitosus MX. Stout, pubescent, branched ; Ivs. ovate to long-lanceolate, 



acuminate, subentire. the lower petiolate ; scales long-pointed, villous, spreading; 

 pales hairy and 3-toothed at top. Dry hills. 111. to Ga. 4 Sf. Rays 15". 



I H. grosse-serratns Martens. St. smooth and glaucous : Ivs. lanceolate <>r lance- 



ovate, long-acuminate, sharply serrate, downy beneath, on winged stalks : scales 

 loose, subulate, as long as the disk ; rays 1520. W. and S. 4 (if. 



II If. tiiberosns L. Jerusalem A rtichoke. Root bearing oblong tubers : Ivs. cordate- 

 ovate to ovate, acuminate ; petioles ciliate. Fields, hedges. 4f. Brazil. 



12 H. laetiflorus Pers. St. branched above : Ivs. thick, lance-oval, pointed, serrate, 

 t>n short stalks ; scales ovate-lanceolate : rays 1220, 2'. Woods. W. and S-W. 3 4f. 



13 H. oocideiitalls Riddcll. Slender, simple, nearly naked above: Ivs. oval, sub- 

 serrate, on long haii-y petioles; hds. 1 5, small ; scales lance-oval. Sandy. W. 3f. 



I \ II. niolliM Lam. Canescent-tomentous, subsimple : Ivs. ovate, ser-eile. cordate- 

 (laspiiir. ju'imr nate: sc. lanceolate ; pales entire, acute : rays 15 25. O. to Mo. 2 4f. 



15 H. < in ere us, ft. StilHvifntii (T. & G.) Cinereous-pubescent: stem virgate, 

 branched above ; Ivs. ovate-oblong, narrowed to the sessile base, the lower to a wir.ged 

 pi'lioU'; palos pointed, with 2 lateral teeth : rays about .20. Ohio. 2 3f. 



IS 



