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xDESCRIPTION OF PLATES.Plate i. Frontispiece. Nytnphaea gigantea violacea. From a painting made by Mrs. E. Rowan,in the Cape York Peninsula, Australia.Plate 2. Nytnphaea odorata. 1-7, development of leaf and stipules; 1, 2, front and back views ofthe same rudiment; 3, older; 4, 5, front and side views of one rudiment; 6, 7, frcntand back views; 8, rhizome with roots and leaves trimmed off, natural size; 9, transversesection of rhizome, natural size. A. Koronski del.Plate 3. Nymphaea gigantea. Under side of leaf and details of flower. 1, anterior sepal ; 2, outermoststamen ; 3, inner stamens ; 4, median petal ; 5, vertical section of ovary ; 6, outermostpetal. Photograph from plant grown at University of Pennsylvania.Plate 4. Nymphaea elegans. Flower and under side of leaf. From plant grown at University ofPennsylvania stock of the Dreer Co. A. Koronski del.;Plate 5. Nymphaea ampla, from Caspary, 1878, pi. 28. 1, flower from hb. St. Petersburg, coll. B.Jaeger, No. 233, Hayti, with 149 stamens, 24 carpels ; 2, leaf from hb. Geo. Engelmann,coll. Wright, No. 1857, Cuba; 3, flower, seen from the side; 4, rays of stigma andcarpellary styles; 5, stamens (2-5 from the same specimen) ; 6, two carpels of a flowerin hb. St. Petersburg, coll. Karwinski, 1841, in Colipa River, Mexico.Plate 6.Nymphaea Havo-virens (N. gracilis Hort, not Zucc, 1832). Flower and under side of leaf,Photo, from plant grown at University of Pennsylvania, from stock obtained from theDreer Co.Plate 7. Nymphaeastellata versicolor. Under surface of leaf and details of flower, a, sepal ;b-e, petals of successive whorls; f, stamens; g, closed flower. From plant grown bythe Dreer Co. (Mr. W. Tricker), from seed sent by W. Gollan, Saharanpur, India.Plate 8.Nymphaea caerulea.Pennsylvania.Flower and under side of leaf.From plant grown at University ofPlate 9. Nymphaea micrantho. 1, under side of leaf; 2, upper side with young plant developing;3 caudex, with a branch ; 4, scars of leaves and of a flower, from surface of a caudex,enlarged ; 5, cross section of caudex ; 6, longitudinal section of a caudex ; 7, superficialtangential section through leaf cushions of Fig. 4; /, base of a petiole; f, base of apeduncle; 8, section a little deeper than 7; 9, same as 8, a little deeper. From a drawingin color by R. Caspary, now in hb. Berlin, by kind permission of the Directors.Plate 10. Nymphaea capensis. Under side of leaf. From plant grown at University of Pennsylvania;stock from Dreer Co.Plate ii. Nymphaea capensis zanzibariensis. Flower and leaf. Plant grown at University ofPennsylvania; stock of Dreer Co. A Koronski del.