00 PARTICULAR STRUCTURE OF THE FLOWERS. 



of this class are or a particular structure, answering to the fol- 

 lowing characters : 



Characters of the Class Tetradynamza. 



Calyx — A perianthiwn, tetraphyllous and oblong; the leaves 

 of which are ovato-oblong, concave, obtuse, conniving, gibbous 

 downwards at the base, the opposite ones equal and deciduous. 

 The calyx in these flowers is a nectarium*, which is the reason 

 of the base being gibbous. 



Corolla — called cruciform, that has four equal and opposite 

 petals. The claws piano-subulate, erect, and somewhat longer 

 than the calyx. The limb plane. The lamince widening out- 

 wards, obtuse, the sides hardiy touching one another. The in- 

 sertion of the petals is in the same circle with the stamina. 



Stamina — The filaments six, and subulate ; of which two that 

 are opposite, are of the length of the calyx ; the other four some- 

 what longer, but not so long as the corolla. The anthem ob- 

 long, a< iminate, thicker at the base, erect, and with their tops 

 leaning outwards. There is a nectariferous glandule, Which in the 

 different genera has various appearances : it is seated close to 

 the stamina,, and particularly to the two shorter ones, to whose 

 base it is fastened ; and these Jiave a light curvature to prevent 

 their pressing upon it, whereby those filaments become shorter 

 than the rest. 



PfSTiLLUM — The germen above the receptacle increasing daily 

 in height. The style either of the length of the longer stamina, 

 or wanting. The stigma obtuse. 



Pericarpium — A siliqua of two valves, often bilocular, open- 

 ing from the base to the top. The dissepiment projecting at the 



* It should be, contains the nectsm^ which is explained afterwards to be a 

 gland, Eoitor. 



