CARNEGIE INSTITUTION OF WASHINGTON. 



WATERLIL1ES, PLATE 15. 



NYMPH/EA ALBA RUBRA, 1-19; N. CANDIDA, 20-22. 



Nympluua alba rubra. 1, Partly opened flower '>. Fully opened flower on its last day. 3, Sepal. 1 h, ivtals. 9-12, Stan. 

 successive whorls from outside inward, viewed from fr<Mit side and back 13. Ovary stripped of sep:\ls. petals ami stamens, from the side. 

 14, Stigma and styles from above. 15. Section <>f ovary 16, Pollen, from pole and from si 

 and styles. 22. Flower cut in half. 



