89 



5 Myosotis, Linn. 

 afropalustris, G. H. Wright. DE. 

 sylvatica, Hoffm. EF. 



6 Lithosp rmuai, Liym. 

 arvense, Linn. ? 



cinereum, A.D.G. 

 officinale, Linn. 



7 Tysonia, Bolus. 

 africana. Bolus. 



EP. 



ORDER CXriL CONVOLVULACEvE. 



Aa Order whose members are widely distributed in tropical and 

 subtropical countries, more rare in temperate climates, and quite 

 absent from the colder ones. Very many of the species are cultivated 

 for the beauty of their flowers, and some have powerful medicinal 

 properties. Jalap is prepared from the rhizomes of Convolvulus Jalajja 

 and U. Schiedeanus, but the best quality is said to be obtained from 

 Fjxogoniitm purga. Scammony is obtained from Convolvulus scam- 

 mo iiia and G. sagittaefolius of the Mediterranean regions, and Ipomf.Ba 

 pahdurata of the U. S. America. Convolvulus dissectus is said to 

 abound in prussic acid, and to be used in the preparation of "Noyau " 

 Oil of Rhodium is the product of the rootstock of Bhodorhiza sp. 



TJie " Sweet potato" is Ipomcea batatas, and is too well known to 

 need further reference here. Many of our indigenous species bear 

 handsome flowers, and are well worthy of cultivation. Perhaps the 

 most striking among them is I. Woodii, first collected in a forest in 

 Zululand. 



I purpurea has similar properties to Jalap, and is known to the 

 natives as i-Jalapa 



Number of species about 800. 



Carpels united into a solid ovary. ] 



Carpels 2-4, separate, or ovary deeply lobed. i 



1 Ovary 1-celled. Style 1. Hewitiea. 



1 Ovary 2-4 celled. Style 1, stigmas didymus or 



2 globose. Ipom(ea. 



I Ovary 2-celled. Style 1, stigmas 2, linear or 



fi I if orm. Convolvulus . 



1 Ovary 2-celled. Style 1, stigmas 2, ovate or 



oblong, flattened. Jacquemoktia. 



1 Ovary 2-celled. Style i , stigmas 2, linear-oblong, 



stem and leaves clothed with stellate hairs. Asterochlcena. 



1 Ovary 2-celled. Style 1, stigmas 2, 2-fid. Ovary 



2-ovuled Leaves sessile. Evolvulus. 



1 Ovary 2-celled. Style 1-2 fid or styles 2 Ovary 



4-ovuled. Breweria. 



1 Parasitical leafless plants. Cuscuta. 



2 (Corolla 2-fid. Ovary 2-parted or lobed, lobes 



2-ovuled. DlCHONDRA. 



2 Corolla crenate. Ovary 4-parted or lobed. lobes 



1-ovuled. Falkia. 



