149 



Nahrgewebe ihrer Samen 01 tmd Proteinkomer enthiilt. Ich fasse sie als Unterreihe 

 Theiieci} znsammen. SpiraUge Anordnting tind tinbestimmte Zahl der Bliitenphyllome 

 kommt bei mehreren dieser FamiUen noch vielfach vor ; und bei den Ochnacece kann 

 man ebensowohl apocarpe GynSceen wie syncarpe, teils mit centralwinkelstSndigen, teils 

 mit wandstiindigen Placenten antrefEen. 



The above statemenfc plainly shows that the Parietales are a very heterogeneous 



group wliich is related to several other series. Its relations to the San-aceniales, 



Rhoeadales, Kanales, Rosales, Sapindales, Salicales, Geraniales, Maivales and 



Centrospermae have been pointed out. It is also allied to the UmbelKflorse, 



as the Dipterocarpacese^^ are connected with the Cornacese by the presence of 



a ring of secretory canals in the medulla - crown in MaHinia (Van Tieghem). 



Moreover, its alHance with the Myrtiflorse is manifested in the analogous 



features of the Elatinacese-^ and the Lythracese (Bartling) ; of the Passifloracese 



and the Thymelaeacese''', in the receptacle aud its effiguration, in the frequently 



stalked ovary, and in many other characters ; of the Loasacese*^ on the one 



hand and the Lythraceae, Myrtacese (Eichler) and Oenotheraceae on the other 



(Da Candolle and Eichler). The resemblance which the Parietales bear to tha 



series of the Archichlamydeae has been fully stated above. It remains to 



compare them with other series of the Metachlamydese. They have some 



i-elationship to the Tubiflorse, as can be seen in the agreement of the Fouquie- 



riaceae'^^ and the Polemoniacese in the 3 - celled ovary, in the more or less 



connate styles, and in the tubiform coroUa with stamens at its base. Also 



they in some measiu*e approach the Ebenales, as the Guttifer» show some 



analogy in fruit with the Ebenaceae'''^ and the Theacese bears some resemblance 



to the Styracaceae. A connection between the Parietales and the Rubiales is to 



be found in a comparison of the Loasacese^ on the one hand and the Dipsacaese 



on the other (Benth.-Hook.). Further, the Parietales are allied to the Cucur- 



bitales, as the Cucurbitaceae^^ show some resemblance to the Passifloraceae 



(Benth.-Hook.) ; to the Achariacese^^ in the gamophyllous corolla ; to the 



Caricacese^''^ in the structure of the ovules (Van Tieghem) ; to the Loasaceae"^ 



1) Nat. Pfl.-fam. III.— 6, p. 252. 2) 1. c. Iir.-6, p. 279. 



3) 1. c. IIL— 6, a, p. 221. 4) 1. c. II [.—6, a, p. 106. 



5) Nat. Pfl.-fam. Nacht. IH. p. 228. 6) Nat. Pfl.-fam. IV.— 1, p. 156. 



7) 1. c III.— 6, a, p. 106. 8) 1. c. IV.— 5, p. 8. 



9) 1. c. Nacht. I. p. 256. 10) 1. c. IIL— 6, a, p. 98 and Nacht. IIL p. 235. 



11) 1. c. m.— 6, a, p. 106. 



