304 



MANUAL OF BOTANY 



occasionally to both these characters. Thus, we find apetalous genera and 

 species in Baniinculaceis, MagnoUacecB, Berberidacew, Sarraceniacea!, 

 Menispermace<z, Papaveracece, Gruciferce, Canellacecs, BixacecE, Vio- 

 lacecBy CaryophyllacecE, Paronychiacecs, ScleranthacecBf Malvacea, 

 SterculiacecB, and Tiliacece. 



Again, in the orders Anonacece, Pittosporacece, PolygalacecB. Portu- 

 lacaceiB, Tamaricacets, TernstrcemiaeecBj Itutace<B, and Dijyteracecp, we 

 find some monopetalous species and genera. 



In DilleniacecB, Papaveracece, Capparidacecs, Besedacece, Violaceis, 

 CaryophyllacecE, Portulacaeem, Malvacece, and SterculiacecB, some of 

 the species have stamens more or less perigynous instead of liypogynous. 

 Again, in some orders, as in certain BanunculacecB, CalyoanthacecE, 

 AnonacecSj Nymphceacece, Portulacacece, Capparidacees, Polygalacece, 

 BixacecB, Ternstrceviiacece, Yochysiacerr, T/JiarecPy and DijjfcrcfreiT, the 

 calyx is more or less superior. 



Sy7wpsis of the British Natural Orders of the Series Thalamiflorcp, 

 A. Corolla polypetalous, hypogynous. 



1. Ovaries many, distinct or united, each with 



a style, or solitary with one lateral placenta. 

 Corolla regular. 



Sepals free. Stamens hypogynous. 



Stamens x , usually many. Anthers de- 

 hiscing by slits BanunculacecB. 

 Stamens equal and opposite to petals. 



Anthers dehiscing by valves . . Berheiidacecs. 

 Corolla irregular. 



Leaves exstipulate. Stamens diadelphous . FumaHacecs . 



2. Ovary solitary, with parietal placenta:tion. 

 Corolla regular. 



Petals 4. 



Stamens x- . Sepals 2, fugacious . Papaveracece, 



Stamens tetradynamous . Crucifera?. 



Petals 5. 



Sepals distinct, 3 inner twisted in the bud, 



2 outer smaller or wanting. Stamens oo Cistacecp. 

 Sepals united below. Stamens iso- or 



diplostemonous inserted on a disc . Taviaricacees, 

 Petals 4-5, clawed. Placentas 3 . . FranJceniacece. 



Petals and sepals acyclic . . Nymphmacece. 



Corolla irregular. 

 Leaves stipulate. Sepals 5. Stamens 5 free Violacece. 

 Leaves exstipulate. Fruit open at the end, 



Stamens co . ..... Besedacece. 



3. Ovary solitary, with axile or free central pla- 



centation. 

 Calyx imbricate in bud, 

 Corolla regular. 

 Placentation free central. 



Calyx tubular . 



Garyophyllacece 

 [Silenece). 



