HELIANTHUS ANGUSTIFOLIUS 
Helianthus — -‘sun’ and ‘flower’; antfustifolius — narrow-leaved 
English name : Sunflower 
Family : Compositae 
Country of origin : America 
Colour : 
Garden use : 
bright yellow. 
a most useful bedding plant, 
lasting a long time in the 
ground and suitable as a cut 
flower. This is another member 
of the family Compositae in 
which the ‘flower’ is a flower 
head made up of two different 
kinds of flowers. 
A, rosette of leaves at base of plant. 
B, inflorescence. 
C, a flower head in face view showing the small 
disc florets and the long ray florets, 
a longitudinal section of a flower head, show- 
ing the disc florets in the centre surrounded 
by the ray florets. 
a ray floret with its long, strap-shaped 
corolla. 
F, a disc floret with tubular corolla, the stamens 
in a cone projecting from it. 
G, another disc floret after the stigmas have 
pushed through the cone of stamens and 
unfolded. 
D 
E, 
