3*4 AROIDEjE. 



Slamina in nudte aggregaU; in calycatis perianthii lobis 

 opposita, seepiusque numero aequalia, Aatheris 

 posticis. 



Ovaria in diclinibu9 in eodem v* distincto spadice infe- 

 riora, agcregata: in hermaphrodilis intra periari- 

 thiufn solitaria, hbera, l— 3-locularia, 1-polysper- 

 ma ; ovulis ertrctis, nunc inversis v. parietalibus. 

 Stylus o, v. simplex. Stigma l. 



Pericarpium clausum, baccatum v. nucamentaceum. 



Seniina albuminosa, raro (germinatione inctpta\ ?) exal- 

 buminosa. 



iZmlryo in axi albuminis, rectus, teres, monocotyledo- 

 netts. 



Radtcula obtusa, umbilicuro spectans v. rafo eidem con- 

 trana. Cotyledon teres, hinc (extus in pericarpio 

 polyspermo,) rima brevi longitudinali fadiculae ap- 

 proximarJL Plumnla 2-3-phyl!a, foliolis margine 

 inVolulis, extefiore cotyledoni opposito ejusdem 

 rimae marginibus amplexo, plus minus deuuilato ! 

 interiora opposita amplexante. 

 Herbce v. Suffrutices. Radix saepe tuberosa v. in- 

 crassala. Folia vaginantia, simplicia v. cortiposita, 

 saspius omnia radicalia. Spadix terminalis v. late- 

 ralis v radicalis, pleruinque solitarius spathaque 

 involutus, nunc nudus. 



Ofis. I. Character unicus toti orditli communis in Embryono 

 positus est, qui ab omnibus monocotyledonibus structura 

 longe diversus. In Gramineis pluniula extra cotyle- 

 donem quoque exstat ; sed hae, Embryone extraalbumen 

 sito, cotyledone peculiaxi et vagina propria plumulae ab 

 Aroideis facile distinguuntur. 



Structura supra. desci ipta r priraum observavi in Calld palustri: 

 dein confirtnavi in variis speciebus Ari; in Acorogramineo, 

 in Gymnnstachi, in Pdtho et in Sparganii triplici specie. 

 In Typhd fateri oportet, (quamvis tbrsan ob ex.ilitatem 

 partium) rimam haud observare licuit.. 



In nonnullis hujus ordinis uti in Draconlio po/yphytloeffoe- 

 tido semina exalbuminosa, plumula (punctum*germinans) 

 lateralis, nuda, saepius solitaria sed quandoque duplex v. 

 tripVex ! e squamulis imbricatis constat. In Dracontio /&o- 

 lyphyllo squamulae extimae, germinatione- incepta, cito 

 marcescunt, aliae paulo ni3Jores interiores dein irj conspee- 



tum 



