MONOCHLAMTDE^. 



C19 



Stigma not contracted in the middle 

 like an hour-glass, 

 Estivation of corolla imbricate. 



Placentas parietal . . . Gentianacece, 148. 

 Estivation of corolla valvate. 

 Placentas axile .... Stilbacece. 147. 

 4. Carpel solitary. 



Stamens opposite the lobes or petals of the 



corolla PlunibaginacecB, 162. 



Stamens alternate to the lobes of the corolla. 

 Fruit 1-celled. Stigma sessile . . . Salvador acete. 158. 

 Fruit .spuriously 2-celled, or rarely 4-celled. 



Style capillary Plantaginacea. 163. 



B. Flowers irregular. 



a. Ovary A-lobed Labiates. 168. 



b. Ovary not lobed. 



1. Carpel solitary Selaginacece . 171. 



2, Carpels two. 



Fruit nucamentaceous. 



Anthers 1-celled Selaginacece. 171. 



Anthers 2-celled. Ovules erect. 



Corolla imbricated in aesti?ation . . Verbenacecc . 169. 

 Corolla valvate in aestivation . . . Stilbacece. 147. 

 Anthers 2-celled. Ovules pendulous . Myoporacecc. 170. 

 Fruit capsular, or succulent. 

 Placentas parietal. 

 Leafless scaly brown parasites . . Orobanchacece . 178. 



Leafy plants. Seeds with wings . . Bignoniace<s. 175. 

 Leafy plants. Seeds without wings. 

 Fruit capsular or baccate. Cotyledons 



minute, radicle long .... Gesneraceee. 173. 

 Fruit bony or capsular. Cotyledons 



large, radicle short .... Pedaliacea. 172. 

 Fruit woody with a pulpy interior. 



Cotyledons large, radicle short . CresceniiacecB. 174. 

 Placentas axile. 



Seeds without wings. 



Albuminous Scrovhulariacees. 177. 



Exalbuminous. Seeds attached to 

 hard placental processes • . AcanthacecB. 176. 

 Seeds winged. Exalbumiuous . . Bignoniacece. 175. 

 Placentas free central Lentibulariacece. 179. 



There are certain exceptions to the characters above given of 

 the Corolliflorse and its sub- divisions. Thus among the 

 Epigynse, we sometimes find polypetalous corollas in Capri- 

 foliacece and Lobeliacece, and hence such plants properly belong 

 to Calycifloras. The ovary is sometimes superior in Goodeniacece, 

 thus resembling the Epipetalee of the sub-class Corolliflorae. 

 In the HypostaminesB, polypetalous species occur in Ericacece, 

 Monotropacece, Pyrolacece, and EpacridacecB, which are therefore 

 Thalamifloral, In Epacridacece also, the stamens sometimes 

 adhere to the corolla, in the same way as in the orders of the 

 Epipetalas of Corolliflorffi. 



Among the Epipetalae we find plants with polypetalous 

 corollas occasionally, as in Styracacece, Oleacece, Primulacece, 

 Myrsinacece, and Plumbaginacece. The stamens are also some- 

 times hypogynous in Ebenacea, Primulacece, and Plumbaginacece, 

 and hence such plants resemble the Thalamiflora if the petals 

 are distinct, or if united the Hypostamineoe of the CorolHflorse. 



