186 



FLORA OF JAMAICA 



Nelumho 



WaterBeau. 



Lagoons, near Ferry, Browne ; McNab ! Macfadyen ! Harhveg ! Dundas 

 (fide Macfadyen) ; near Lacovia and Pedro, St. Elizabeth, R. K. Tomlinsonl 

 Cornwall, Britton ! 



Bhizonie horizontal, cylindrical, 8 mm. br. Leaves to 6 dm. br. when 

 young and flat on water, later raised above water still larger and concave. 

 Sepals about 2-5 cm. 1. Petals more or less obovate, about 30, outer 

 smaller and calyx-like, inner about 9 cm. 1., and 45 cm. br., of a primrose 

 colour. 



Very near the N. American N. lutea, and possibly not specifically 

 distinct. 



Family XXIY. CERATOPHYLLACE^. 



Aquatic submerged herbs with long leafy branches. Leaves 

 whorled, 2-cleft or dichotomously divided, with linear divisions, 

 often toothed. Flowers solitary, monoecious, sessile in the axils 



A, Portion of plant X ii- 



B, Male flower, magnified. 



C, Stamen, masiiifiecl. 



D, Female flower cut lengthwise showing 



the ovule, magnified. 



Fig. 75. Ceratophylluin demersxnn L. 



E, Fruit, magnified. 



F, Fruit cut lengthwise ; c, cotyledons ; 

 p, plumule. (B-E after K. Schumann, 

 F, after Baillon.) 



of the whorls. Perianth with 6-12 narrow equal divisions. 

 Male flowers : stamens 10-20 ; anthers almost sessile, slightly 

 exceeding the perianth ; cells 2, extrorse ; connective produced 

 into a thick coloured appendage generally 2- or 3-toothed. 

 Female flowers: ovary 1, sessile, ovoid, 1 -celled ; style long, 

 stigmatose ; ovule 1, pendulous. Fruit an indehiscent nut. 



