47 



PHANEROGAMS. 



one repeatedly producing new protuberances, which at length develop 3 by inter- 

 calary growth into a compoundly and repeatedly branched filament; the ends of 



Fig. 3-!4. — Longitudinal section of tlic flower of 

 Calothaninus ; / the ovary, s calyx, / petals, ^ style, 

 st branched stamens. 



Fig. 333. — Part of a male flower of Rtciiiits co)innunis 

 cut through lengthways ; ff the basal portions of the 

 coinpoundly-branched stamens ; a the anthers. 



the branches all bearing anthers. In the Hypericineae, three or five large broad 

 protuberances (Fig. 336, II-V, a) spring from the periphery of the floral axis after 

 the formation of the corolla, on each of which smaller roundish knobs are produced 



Fig. 336. — Development of the flower oi Hypericii7n perforatinn ; /young flower-bud in the axil of the bract B, with its 

 two bracteoles 6 i, s the sepals, / first indication of the petals ; //middle part of a somewhat older bud, /rudiment of the 

 ovary, a, a, a the three stamens with the rudiments of their branches arising as protuberances ; ///a flower-bud of nearly 

 the same age as in //, but seen from the side, s a sepal, a a the stamens.y the ovar>' ; /y and l^ flower-buds in further 

 stages of development, the letters indicating the same as in /, //, and ///,- i, 2, 3 ovary in various stages of development cut 

 through horizontallj-. 



in basipetal succession from its apex ; these latter become the filaments, each of 

 which eventually bears an anther, and are connected at their base with the primordial 

 protuberance of which they are branches. A horizontal section through the flower- 



