185 



Series XVIII. Leitneriales 



55 Leitneriaceae n : Tills family may be in some degree connected with 

 the Harnarnelidacere by the presence of the resin -ducts in the medulla -sheath. 



Series XIX. <Tnglandales 



56 Juglandaceae ::) ' Closely related to the Juliauiaceae and to the Myri- 

 cacese. Also related to the Fagacete, in the arrangement of the flowers. 

 Further, the family is comparable with the Anacardiacese in the exstipulate 

 imparipinnate leaves. 



Series XX. Batidalcs 



57 Batidacese 3) : Related to the Amarantacesa and Phytolaccacese, and 

 also to the Chenopodiaceae. 



Series XXI. Julianiales 



58 Julianiaceae ' ' See statement under the Julianiales in the review of 

 and critical remarks on ENGLER'S principles and his system in the present paper. 



Series XXII. Fat/ales 



59 Betulacese 5) : Closely related to the Fagacece in the inflorescence 

 and in the parietal ovules. Also to the Myricacese and Juglaudacese. 



60 Fagaceae : Intimately connected with the Betulacese, also with 

 the Myricacese, Juglandacere and Julianiacese. 



Series XXIII. Urticales 



61 Ulmaceae : This and the two following families are closely inter- 

 related. 



62 Moraceae 7) : As above. 



63 Urticaceae : As above. 



Series XXI V. Pt'oteales 



64 Proteaceae s) : Somewhat approach the Thymelseacese and Lauracese. 



1) Nat. Pfl.-fam. Naclit. I. p. 117. 2) Nat. Pfl.-fam. HI. 1, p. 22. 



3) Nat. Pfl.-fam. HI. 1, a, p. 120; Nachtr. HI. p. 105. 



4) HEMSI.EY, W. B. On the Julianiacere, in Phil. Trans. Roy. Soc. Lend. Vol. CXCIX., (B. 

 253), pp. 190-193. 



5) Nat. Pfl.-fam. III. 1, p. 41. 6) 1. c. III. 1, p. 52. 



7) 1. c. III. 1, p. 69. 



8) BENTH.-HOOKEB, Genera Plantantm. III. p. 165. 



