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A TEXT-BOOK OF BOTANY. 



FIG. 230. Manner of cross- pollination in some hermaphrodite flowers, i, 2, 

 Flowers of buckwheat, showing long style and short filaments in i, and short styles and 

 long filaments in 2: a, anthers; st, stigmas; n, nectaries. 3, Spike of plantain showing 

 maturing of stamens below and pistils above. 4, Dissected flower of plantain: b, bract; 

 c, calyx; p, corolla tube; s, stamens; t, protruding withered style. 5, Flowers of Purple 

 willow-herb (Lythrum Salicaria), one side of the perianth removed from each. A is long- 

 styled, B, medium-styled, and C, short-styled. The direction of the arrows and dotted lines 

 indicates the best methods of crossing. i, 2, 5, adapted from Warming. 



