212 
Composite. 
303. Rudbeckia. Rudbeckia. XIX, 58. 
1. Stem 100—180 cm. Heads large. Ray-fls 45 — 50 mm long, 
bright yellow; disk fls greenish brown.—Naturalised 
in river side thickets, e. g. near Chexbres, near Stein; 
a N.American pi. 7. *laciniata L. 1144. 
304. Helianthus. Sunflower. XIX, 60. 
1. Ls all cordate-oval. Heads very large (as much as 30 cm 
diam.), drooping.—Cultivated; a native ofN.America. 7, 8 
t annuus L, 1145. 
— Upper ls oval-oblong. Heads smaller, erect. Jerusalem 
Artichoke. —Cultivated. 9, 10. . f tuberosus L. 1146. 
305. Bidens, Bidens. XIX, 30, 58. 
1. Ls dark green, narrowed into a short winged petiole, 
gen. 3—5-partite (rarely, in small pis, undiv.). Heads 
erect, gen. without rays (rarely with rays).—Damp places, 
ditches, rubbish-heaps; distrib. 7, 8 tripartita L. 1147. 
— Ls light green, sessile, slightly united at the base, un¬ 
div., toothed. Heads gen. nodding and rayed.—As the 
last, but less common. 7, 8 . . . cernua L. 1148. 
306. Carpesium. Carpesium. XIX, 53. 
1. Resembling Bidens cernua var. discoidea, but ls altern.— 
Damp places, road-sides, wooded mountain slopes; lower 
Rhone valley; Lakes of Geneva, Thun, Constance and the 
four Cantons. 1 ... . cernuum L. 1149. 
307. Filago. Filago. XIX, 48. 
1. Invol.-leaflets cuspidate, not spreading at maturity. Heads 
in clusters of 10—30. Type of F. germmiica L. . 2 
— Invol.-leaflets rather obtuse, spreading in the form of 
a star at maturity. Heads in clusters of 3—7 . 4 
2. Branches spreading. Ls narrowed to the base. Clusters 
composed of 10—15 heads, exceeded by the floral ls, 
F. germanica pyramidata Gaud.—Fields, slopes; Y. B&le. 7 
spathulata Presl. 1150. 
— Branches erect. Ls not narrowed to the base. Clusters 
composed of 15—30 heads ..... 3 
3. PI covered with a yellowish green tomentum. Invol.- 
leaflets reddish at the top. F. lutescens Jord.—As the 
last; localities still uncertain! \Y. Y. Bale, Diessen- 
hofen. 7.apiculata Sm. 1151. 
— PI. covered with a whitish gray tomentum. Invol.-leaflets 
yellowish at the top. —As the last and sometimes with 
it. 7.canescens Jord. 1152. 
