J\i''ajas. DIOECIA MONANDRIA. 749 



exposes what I call the true embryo lodged a little above its 

 middle, and composed of two unequal lobes, resembling- co- 

 tyledons pointing to the base of the vitellus ; from the upper 

 pointed end of this biiobate body the radicle issues, when ve- 

 gefation commences, passing out through the mouth of the 

 cell, and the apex of the nut now open ; from the middle of 

 the upper side of the radicle bursts forth, in due time, the 

 plnmula, in form of a small scale, and from its centre other 

 scales continue to spring; the fourth, or fifth, begins to take 

 the form of the pinnate leaf of the full-grown plant. 



From the fresh wounded parts of all the three species of 

 Cycas known to me, viz, circinalis, revoluta and this, there is 

 discharged a quantity of clear, insipid mucilage, M'hich soon 

 hardens into firm, transparent gum, like trac/acanth, but 

 clearer ; my experience however does not lead me to think 

 that any one of the three yields sago, or even a substitute 

 for it. I dare not venture to quote Toddapannaoi Rheede's 

 Mulabaricns, iii. t. 13 — 21, for this, because it has al- 

 ready been quoted by Linnceus, &c. for C. circinalis, yet I 

 think Rheede's figures and description, agree better with this 

 plant than with what I have already described, and figured 

 under that name. For more information, consult Rumph's 

 Herbarium Amboinense, i. p. 80* — 92, and the figures there 

 quoted. 



NAJAS. 



Male calyx cylindrlc, bifid. Coro/ four-cleft. Filaments 

 none. Female calyx none. Corol none. Pistil none. Capsule 

 one-celled. 



^. dichotoma. R. 



Dichotomous. Leaves tern, filiforn. Seed solitary, oval, 

 smooth. It grows in deep pools of sweet water in Bengal, 



