HELIANTHUS 



try luay be said to 

 ■; at present but two 

 well-developed markets for tbe seed. jj, q, Kains. 



innuals: Ivs. long-pel ioled: 

 disk brown or purplish. 

 '.. Stem erect, stout, simple or 

 branching above 



BB. Stem diffuse, slender, branch- 

 ing freely from the base 



i. Perennials by creeping root- 

 stocks: Ivs. sessile or short- 

 petioled. 

 B. Bisk brown or purplish. 



c. Itvs. linear, entire {except 



the lou 



cc. Jyi^s. ovate to broad-Ian 

 late, mostly toothed, i 

 rowed at the base in 

 winged petiole 



BB. Bisk yellowish, 



C. stem smooth below, the 

 branches often slighttij 

 rough or pubescent. 

 D. t/vs.pale beneath 



cc. stem rough or hairy hiUnc. 

 D. Sootstocksthicheiml In- 

 to one or more fleshy 



laevigatus 



strumosua 



grosse-serratus 



decapetalus 



divaricatus 



giganteus 



Maximiliani 



tuberosus 



DD. Jlootstocks all slender. 



E. Lower Ivs. sessile or 



with a clasping 



EE. Lower Ivs. short- 

 petioled. 

 p. Stem 1-2 ft., not 

 branching 18. 



FP. Stem usually over 



S ft., branching. \9. 



Istiflorus 

 CaliJornicus 



hirsutus 

 trachelifolius 



1. 4nnuus, Linn. Common Sunflower. Stem 3-12 

 ft., rough-hairy, often mottled : Ivs. 4-12 In. long, 

 broadly ovate, acute, the lower cordate, coarsely serrate, 

 rough on both sides: fls.3-G in. wide in wild specimens, 

 often 14 in cult. July-Sept. Minn, to Tex., west to 

 Wash, and Cal. Gn.27, p.68. Gt.4;!,p.!»5{asir. ?('«^id(- 

 laris). B.R. 15:1265 (as i?. le,it!c,ih,ri.-:\ .- X valuable 



economic and 

 fodder, the fls. yield a yell 

 oil and are used for food. 

 Russia. H. „ 



has Ion 

 id into 1 



ed for 



IS. Com- 



mon varieties are: Var. Calif6micus, vt-ry large and 

 double; var. citrinus, with primrose-colored rays (Un. 

 49, p. .'!27i; var. globdsus fistulbsus, having enormous 

 globular heads; var. ninus fl. pl,(Globe of Gold), dwarf 

 and double, valuable for borders ; Russian Giant, 

 10-12 ft. high, single, grown mostly for seed; var.varie- 

 gatus, with variegated Ivs., but not especially attrac- 



HELIANTHUS 721 



2. argophyllus, Torr. & Gray. Silvekv-le.\ved Sun- 

 FLOWEH. Stem usually 4-.t ft. high, soft grey, with a 

 dense, silky pubescence, especially the upper branches. 

 Otherwise like H. annuus, into which it seems to vary 

 under cultivation if the seedlings are not constantly 

 selected for their silky character. Te.xas. The var. 

 Texana, Hort., which does not differ botanically front 

 the type, is an attractive form of this species. R. H. 

 18o7,p 431 Gn 12, p 280, 27, p b7, 55, p 147 



3 dftblUs, Nutt {E cui-ume<ifohus,1iycr & Gray) 



CUI UMBER LEA\ ED SUNFLOWER J 1^ 1026 St 1-4 ft 



high, haiiv throughout branchcb often mottled with 

 purple or white each onebeaiin,; a fl hs 1-4 m long, 

 ovate to triangular, generill) with a coidate base, thin, 

 globsj , irregularly toothed or entire fls 2-3 m wide 

 on slendei peduncles Julj-Sept Fla to Te\as and 

 westwaid GC 111 17 167 Gt 44, p 571 BM 7432 

 Gn 49 1064 —This is one of the best for cut fls It 



# 



1027. Clump of Helianthus oreyalis. 



4. orgyalis, DC. Fig. 1027. Stem 8-10 ft. high, strict, 

 smooth, very leafy: Ivs. 8-16 in. long, slightly rough, 

 drooping: fls. numerous, lemon-yellow. Sept., Oct. 

 Dry plains, Neb. to Tex. and westward. Gn. 27, p. 67; 

 55, p. 147. F.R. 2:146.-This species has distinct and 



