64 



T^OMENCLATURE. 



the tube-form ; in compound flowers, it appears as a half 

 flowret (semi-Jlosculus) ; and in the Orchidege, as a small lip 

 (labellum). In the latter, the highest upright and open 

 leaves are, notwithstanding their colour, the calyx. The la^ 

 bellum, in the Orchideae, extends downwards into an obtuse or 

 pointed sack, which is called the spur (calcar) ; whilst an- 

 other small sack (perula), is formed by the prolonged base of 

 the calyx. 



96. 



A very frequent species of irregular corolla, is the ringent 

 and labiated {ring ens and labiata). We not only find this 

 form in what are called the Labiatae, but in many of the 

 Irideae, Liliaceae, and Coronariae. In this case, the corolla 

 is composed, as it were, of two lips, one higher and the other 

 lower {labium superius and iriferius). The interval be- 

 tween both is here also called the throat {faux). 



If the two lips are so closely set to each other, that we 

 cannot see into the interior of the corolla, such a corolla is 

 said to be personate, or masked {personata, la?'vata). The 

 elevated and arched part of the lower lip, receives the name 

 of the palate {palatum). The upper lip, especially when it 

 is arched, is called the helmet {galea). 



97. 



Compound flowers {Jlores compositi), are those which are 

 crowded together upon a common receptacle, and surrounded 

 by a common cover. They are particularly distinguished 

 from the aggregated flowers (Jlores aggregati), by the fol- 

 lowing circumstances : that in the former the antherae are 

 united with the flower, in the latter they are free ; that in 

 the former there are five, in the latter four antherae ; that 

 in the former there are two stigmata, in the latter but one ; 

 lastly, that in the former the embryo is placed upright in the 

 middle of the albuminous matter, and in the latter it is in- 

 verted, whilst the albuminous matter itself is consumed. 



In compound flowers, the tube is the principal form ; the 

 tongue-fojrm appears to be more imperfect, but very common, 



