x Description of Plates. 



Plate ia. Nymphaea tulfurea. I, s, leaves viewed from the upper surface; 2, under side of leaf; 

 3, a closed flower; 4, fully open flower; 6, rhirome. From a co-type in hb. British 

 Museum, by courtesy of the Curators. P. Highly del. 



Plate 13. Nymphaea mexicana. Flower and leaf, natural size. From plants grown at University 

 of Pennsylvania, from roots collected in Little River, Fla., by Prof. J. M. Macfarlane. 

 A. Koronski del. 



Plate 14. Nymphaea tetrogona. Flower and under side of leaf, natural size. From plants grown 

 by the Dreer Co. 



Plate 15. Nymphaea alba rubra, 1-21 ; N. Candida, 22. Nymphaea alba rubra. I, partly opened 

 flower; 2, fully open flower on its last day; 3-8, petals; 9-12, stamens of successive 

 whorls from outside inward, viewed from front, side and back; 13, ovary stripped of 

 sepals, petals and stamens, from the side; 14 stigma and styles from above; 15, section 

 of ovary ; 16, pollen, from pole and from side ; 17-19, fruits ; 20, petal ; 31, stigmatic 

 lobes. Nymphaea Candida. 22, flower cut in half. From drawings in color by R. Cas- 

 pary, now in hb. Berlin, by kind permission of the Directors. 



Plate 16. Nymphaea lotus. Leaf, flower, transverse and vertical section of fruit. Photo- 

 graphed by P. Highley from a specimen coll. Schweinfurth, Nov., 1887, at Damietta, 

 Egypt. > n hb. British Museum, by courtesy of the Curators. 



Plate 17. Nymphaea pubescens. Flower and under side of leaf. From a plant grown by the Dreer 

 Co. (Mr. Wm. Tricker), from seed sent by Mr. W. Gollan, Saharanpur, India. 



Plate 18. Nymphaea rubra. 1, flower of second day, between 9 and 9.30 a. m. ; 2, flower at same 

 time of third day; 3, flower at same time of first day; 4, flower of fourth day, be- 

 tween 8.45 and 9 a.m.; 5, sepal from outer and inner sides; 6, petals of first (at left) 

 and second whorls; 7, petal of innermost whorl; 8-10, stamens from outer and inner 

 sides; 11, 12, dry pollen; 13-15, pollen germinating in sugar solution; 16, 17, pollen, 

 examined in citron-oil, 18, 19, in water, 20, in dilute sulphuric acid; 21, germinating 

 pollen; 22, section of carpellary style; 23-26, hairs of ovary, 24 treated with potash; 

 27, pistil seen from above ; 28, ovary of Fig. 3, with stamens ; 29, ovary on second day. 

 From color drawings by R. Caspary, in hb. Berlin, by kind permission of the Directors. 



Plate 19. Nymphaea amazonum. 1, closed flower after its first night; 2, fully open flower, 

 second night between 4.30 and 4.45 a. m.; 3, the same flower on the first night be- 

 tween 4.30 and s a. m. ; 4, sepal, inner side ; 5, petal of outermost whorl, from with- 

 out; 6, 7, 8,9 petals of the next four whorls; 10-13, stamens of successive whorls; 

 14, is, side and section views of ovary after the second night; 16, ovary after the 

 first night; 17, transverse section of ovary; 18, 19, pollen, dry and in water; 20, 

 epidermis of ovary. From color drawings by R. Caspary, in hb. Berlin, by kind 

 permission of the Directors. 



Plate 20. Nymphaea rudgeana. 1, flower on its first night, 10.15 P- rn. ' 2, the same between 

 9.20 and 9.40 p. m. ; 3, 4, ripe fruits ; 5, closed flower after first night ; 6, flower with 

 3 outer whorls of floral leaves removed; 7, sepal from within; 8, petal of outermost 

 whorl; 9, petal of second whorl; 10, petal of fourth whorl; 11, stamen of outermost 

 whorl of four; 12, stamen of second whorl of four; 13, stamen of third whorl of 

 seven or eight; 14, 15, inner and innermost stamens; 16-19, views of ovary; 20, 21, 

 22, pollen in dilute sulphuric acid, dry, and in water; 23, ripe fruit with floral leaves 

 removed; 24, transverse section of ovary; 25-27, sections of carpellary style at apex, 

 just below the club-shaped apex, and at base ; 28, papilla; of stigma. From color 

 drawings by R. Caspary, in hb. Berlin, by kind permission of the Directors. 



