RESPONSIO AD QUAESTIONEM BOTANICAM. 83 



giries sese ad interiora fleclant , ovula proferant , quae forsan e finibus nervorum vena« 

 rumque oriantur (1). 



R. Brownii sentenliam ab hac non procul recedere bis ejus verbis confirmatur (2) ; 

 > In the ovaiium on the other band , the vascularity , compared with tbat of the leaf , 

 is in general rather modified than diminished , the principal vessels occupying the mar- 

 gins or lines of production , and giving ofT branches towards the axis, whose vascula- 

 rity is frequently reduced, The ovula constantly arise from vascular cords , and , with 

 leference to the supposed original slate of the ovarium , are uniformly produced exter- 

 nally; though by the union of its parts , whether in simple or Compound State, Ihy 

 become always inclosed , and , before fecundation at least , are completely protected 

 from the direet action of light and of the atmosphere. " 



Sed haec de variis auctorum sententiis; in cai-pilH ipsius formationem nunc inqui- 

 j-amus. 



§. 2. 



Continuatio, 



Cel. De Candolle utramque hanc partem in carpello complectens, rem , ea qua est 

 simplicitate clare et dilucide explicat. Carpellum enim considerat tanquam folium ad 

 interiora in se ipsum volutum , quodque germina , foecundatione in vit<im vocanda , 

 in se continet ; conslat igitur ejusmodi carpellum: 



1. ex involucro externo a folio fonnato , 



2. ex ovulis inclusis , angulo interno carpelli afBxis , ad marginem nempe folii ; 



3. parle, cui ovula aiEguntur, vasorum copia gaudeute , placenta dicta. 



4. Apex superior carpelli, variae longitudinis , Stylus appellatur et stigmate , apico 

 suo glanduloso , terminalur (3). 



Carpellum vero in Universum e folio origüiem ducere ex sequentibus clarius elucescat : 



1. Summa est inter folium et carpellum similitudo quoad fabricam organicam, uti 

 constat e nervis venisque simili ratione distributis , e stomatum frequenti praesentia , ut 

 et pilorum atque glandularum , si nempe haec in folio eliam adsunt ; idem utroque etiam 

 competit color eademque Gas Acidi Carbonici decomponendi facultas. 



2. Facultas gemmas formandi eliam in foliis non frustra quaeritur, imo eodem loeo 

 haec vis latet ac in carpello ; quod egregie confirmat notissimum illud Bryophyllum 



ca- 

 ll) Linnaea, T. I. 4. p. 6o3. (a ) Linnean Societ, Transact. , XIII. p. 21 3. 

 (3) Theor. eUment,, p. i3o: « Chaque carpelle est un petit tout, im pistil eatier, comp»s4 d'un 

 ovaire , d'un style et d'un stigmate. " 



L 2 



