^21. '3 



EXPLANATION OF PLATE XLIX. 



I. The Water-Plantain Tribe. — 1. A portion of the whorled 

 panicle oi common Water- Plantain (AlismaPlantago). — 2. A complete 

 flower. — 3. A calyx, stamens and pistil ; a a the sepaline glands, or 

 rudimentary stamens. — 4. A carpel; a its recurved stigmatic face. — 5. 

 A section of the ovary, shewing the ovule a, elevated on its curved 

 stalk. — 6. A fruit. — 7. One of the nuts much magnified; a the remains 

 of the style. — 8. A vertical section of the nut, shewing the seed with its 

 horse -shoe embryo : a the base of the style. 



IL The Water-Lily Tribe. — 1. A flower of the white Water- 

 Jjihj (Nymphaea alba). — 2. A vertical section of the pistil, from which 

 the petals, &c. have been cut away; a a first transition from petals to 

 stamens ; b perfect stamens ; c diminished stamens. — 3. A view of the 

 front of a transition petal. — 4. A complete stamen. — 5. A transverse 

 section of the ovary, with the ovules adhering to all the faces of the 

 dissepiments. 



