APPENDIX I 425 



Family 2. Fagaceae. — Flowers and leaves together, 

 or former first ; perianth 4-7-partite ; male catkins simple 

 or compound ; stamens 4-14 ; carpels 3-4 j styles 3-4 ; 

 fruit with cupule. 



Tribe i. Fagece. 



Genus, /^i^wi- (Introductory Vol., p. 190). 

 Tribe 2. CastanecE. 



Genera. Castanea^ Quercus (Introductory Vol., 

 p. 187). 



Order 5. Urticales. — Flowers cyclic, in cymose 

 panicles, homochlamydeous, rarely naked, usually 

 2-nierous, rarely 2 + 3, generally regular ; stamens 

 anteposed to perianth-leaves ; carpels 2-1 ; gynoe- 

 cium superior, with i ovule ; fruit a nut. 



Family i. Ulmaceae (Introductory Vol., p. 180). — 

 Flowers usually bisexual ; perianth 4-5-partite ; stamens, 

 4-5 ; carpels (2) ; styles 2 j fruit a nut or drupe. 

 Sub-Family. Ulmoideae. 



Genus. C//;««j- (Introductory Vol., p. 182). 

 Family 2. Cannabaceae. — Plant dioecious ; male 

 flowers, perianth 5-partite ; stamens 5 ; female flowers with 

 cup-like perianth ; carpels 2 \ styles 2 ; ovule pendulous ; 

 fruit a nut. 



Genera. Humulus (Vol. Ill, p. 247), Cannabis. 

 Family 3. Urticaceae (Introductory Vol., p. 176; 

 Vol. Ill, p. 245). — Flowers unisexual; perianth 4-5-partite; 

 stamens incurved in bud ; ovary i-locular ; ovule r ; fruit 

 an achene or nut. 



Tribe i. Urticece. 



Genus. 6V//V« (Introductory Vol., p. 177) 

 Tribe 2. Parietariccz. 

 Genus. Farietaria. 



