SUNFLOWER FAMILY 209 
flowered, solitary or cymose, pedunculate, gran! radiate. Phyllaries in 2-3 series, 
equal, her baceous, soon deflexed or merely | y spreading in age. Receptacle naked, 
globose or ovoid, sometimes convex -flowers when present pistillate (more rarely 
sterile), mostly yellow, 3-5-lobed or ‘Mothed, reflexed or spreading. Disk-flowers sia 
perfect, yellow or purplish brown especially on the lobes, tube very short, throat cylindr 
or narrowly campanulate, the lobes with glandular hairs. Anthers minutely auricled or 
sagittate at base. Style-branches flattened, more or less truncate, peni rie ate. Achenes 
turbinate, angled and ribbed, in ours hirsute with ascending hairs, at lea g 
and ribs; ry paleae several, hyaline in ours, awn-tipped and often ridin on the 
margins. [A Greek word for some unknown plant, said to be named for Helen of Troy. ] 
genus # about 40 species, alt natives of North and South Ameri Type species, Helenium autumnale L. 
sub- 
Leaves crowded and mostly fascicled, filiform. 1. H. amarum. 
Leaves not fascicled or crowded, not filiform. 
Rays linear or narrowly nib neh et longer than wide, spreadin 2. H. hoopesii. 
Rays flabellate or cuneate, one-half or more as Noe as long dist iby always reflex 
Coarse annuals tae nials; ase ll and hee inconspicuous, much horter than the disk; stems 
panteutately end Seely} branched. . H. puberulum. 
Perennials; rays 
: a gaat aE equaling to much surpassing the disk; stems Aid or corymbosely 
branched abov 
the 
size on the upper stems, at pret some denticulate. tumnale. 
Heads solitary or the stems bo aetimes 2 or 3) long-peduncled; leaves typically itonad on the 
upper stems, always ent 
Pappus-paleae one-half (coiatioawe two-thirds, rarely longer) as long as the disk-corollas; pe- 
oe cles pinned slender and not conspiewously enlarged below the disk; grad of footh'lls 
Cal 
Heads several to many on ain stems, the peduncles mostly short; leaves yy Fg much reduced in 
Ke L 
mountains, California and southe ot Sea Res H. big 
Pappu palese nearly or quite as sed « disk-corollas; peduncles ut nd n wably en- 
ged below the disk; coastal m Hor of juntas catae ‘Graaen and northwestern California, 
. H. bolanderi. 
5333. me re) 
5340. Hy ymenoxys lemm 
5341. Hymenoxys odorata 
