GAMOPETAL^— PRIMULACE^ 



149 



Type I. 



Vegetative characters. 



rhizome. Leaves radical, 



PRIMROSE {Primula vulgaris). 



-Perennial herb with a stout vertical 

 exstipulate, simple. Inflorescence 



Fig. 187. — Vertical sections of the two forms of flowers of Primrose, showing 

 the corresponding positions of anthers and stigmas. 



an umbel at the summit of a bare inflorescence-axis. Bracts 



are present, but there are no prophylls on the flower-,stalks. 



Flower (fig. 187) actinomorphic, ?, ^ 



cyclic, hypogynous. Two different forms 



of flowers occur on different individuals. 



Sepals {ex) five, combined. Petals (cor) 



five, combined to form a corolla with a 



long tube. Stamens five, inserted on the 



corolla. The five stamens are opposite 



(not alternate with) the five petals. 



Anthers with introrse dehiscence. 



Carpels five, syncarpous, superior. 



Ovary (pv) one-chambered, with many 



campylotropous ovules on a free-central 



placenta. Style one. Stigma knob-like. 



As there is only one style, a simple stigma, 



and the ovary is one-chambered with a central placenta, it be- 



J. — Floral diagram 

 of Primrose. 



