6o 



SCIENCE PRIMERS. 



[XII. 



the base of the perianth opposite its pieces. Pistil of 3 

 combined carpels with 3 cells and i style and stigma. 

 Orchis (Fig. 43). Flower irregular. Perianth 

 irregular of 6 pieces. Stamen i, combined with the 

 style. Pistil of 3 carpels combined into a i-celled 

 ovary. 



E. Flowers without an obvious -perianth. 



Willow (Fig. 38, 39). Flowers in catkins (78). 

 Catkins of two kinds on different plants, both formed 

 of overlapping scales ; those of one kind of catkin 

 overlying each one or more stamens ; those of the other 

 catkin overlying each a single pistil. Pistil of 2 carpels 

 combined into a i -celled ovary with 2 styles. 



FIG. 38. Male flower of Willow, 

 enlarged. 



FIG. 39. Female flower of Willow, 

 enlarged. 



Wheat (Fig. 40). Flowers in spikelets consisting 

 of 2 minute scales (the perianth), 3 stamens and i 



