DICOTYLEDONS 215 
The third order of. the Anisocarpe, the Contorte, 
includes several characteristic families, among them 
the milkweeds (Asclepiadacee) and dogbanes (Apo- 
cynacee). To the latter belong the oleander and 
‘periwinkle, while the gentians, and the olive family 
Fic. 53 (Sympetale, Labiatiflore, Compositz).— A, flower of dead-nettle 
(Reuiam) the flower strongly zygomorphic; B, stamens and pistil of 
amium; C, flower of speedwell (Veronica), the stamens reduced to 
two; D, flower of toad-flax (Linaria), the flower zygomorphic, and 
the base of the corolla prolonged into a spur; E, inflorescence of the 
Canada thistle (Cirsium), the small flowers aggregated into a head 
which looks like a single flower; F, an individual flower of E; 0, the 
inferior ovary; p, the hairs which form the ‘ pappus,’’ or calyx; an, 
the coherent anthers; G, inflorescence of the may-weed (Maruta), the 
outer flowers sterile and petal-like, serving merely as organs for attract- 
ing insects ; H, one of the tubular perfect flowers from the central part, 
or disk, of the inflorescence of Maruta; I, a single flower from the inflo- 
rescence of the dandelion: all the flowers are alike and have the corolla 
split open and strap-shaped ; p, the feathery pappus; 0, the ovary. 
(Oleacez), with the lilac and ash as familiar representa- 
tives, also belong to the Contortz. 
The highest of all the Anisocarpe, and therefore at 
the head of the whole vegetable kingdom, are the 
Aggregate, including several families. Of the lower 
families, the honeysuckles (Caprifoliacee) and the 
madder family (Rubiacez) are the best known, while 
