Fig. 90 (b). 
a , vertical view of a flower-head; b, a disk-flower with young fruit; c, 
longitudinal section of a disk-flower; d, pollen-grain ; e , a ray-flower with 
pappus; f, style; g, achenium dissected lengthwise; h, achenium cut 
transversely; i, embryo ; all magnified, but to various extent. 
