Origin ami Development of the Composite. 143 
Liguliflorae (see Figs. 22-24). There is a large vegetative nucleus 
and two small, more or less vermiform male nuclei. 
Oogenesis. Considering oogenesis next, the first controversial 
point is the cauline or lateral origin of the ovule. Most writers are 
Figs. 56-H3. Oogenesis in Senecio vulgaris. 
