477 

 (1) N. PETJXicANs. (Thumb,) 



Bent. Thunb. in Act. Holm. 1782, p. 231.— Eoxb, flor. Ind, 

 III. 650. 



Syn. Cocos Nypa. Low. Cock. 694. 



Bngrav. Mart. Palm. t. 108. 



Spec. Chae. Palm-shaped : stem low : fronds terminal, pinnate, 

 unarmed: pinnae lanoeolate-lineax, acerose-dentate : petioles stem- 

 clasping at the base : male flowers very minute : fruits aggregated 

 into a large capitulum. 



Soonderbnns. 



ORDER CLXXIX. PISTIACEiE. 



Spadix connate with the spathe, not distinct: flowers ap- 

 pearing from the margin of the fronds, naked, the males 

 remote from the solitary felmale : stamens definite, often 

 monadelphous : ovary 1 -celled: ovules many, erect on a 

 basilar or sub-lateral placenta, orthotropal: style distinct i 

 fruit membranous or capsular, 1 or more seeded : seeds albu- 

 minous: embryo antitropal, — Aquatic floating herbs: leaves 

 entire, many nerved, lobed. 



GENUS I. LEMNA. 



llonoeeia Monandria. Sex: Syst: 



Derw. From Lepis, a scale, in reference to the form of the 

 plants. 



Gen. Chab, Male flowers 2, one more precocious in development 

 than the other : filaments filiform, recurved : ovary 1 -celled, ovule 

 erect, horizontal, half-anatropal : style elongated, recurved : utricle 

 1 -seeded, indehiscent : seed affixed in the bottom, horizontal, trans- 

 verse : embryo conical : radicle lateral, remote from the hilum. — 

 Small herbs inhabiting stagnant or gently flowing waters : fronds 1- 

 rooted, dehiscing with twin basilar clefts : flowers proceeding from 

 a lateral cleft. 



