ELM TKIBJi— CATKIN-BEARING TRIBE 263 



3. HUMULUS {Hop)- 



I. H. lupulus (Common Hop). — A beautiful climbing plant, 

 commonly cultivated for the sake of its catkms, which are'used to 

 give a bitter flavour to beer, and naturalized in many places. — 

 Fl. July. Perennial. 



Natural Order LXXVI 



ULMACE^.— Elm Tribe 



Stamens and pistils in the same 01- different flowers ; perianth 

 bell-shaped, often irregular ; stamens equalling in number, and 

 opposite to, the lobes of the perianth ; ovary not attached to the 

 perianth, 2-celled ; stytes and stigmas 2 ; fruit i- or 3-celled, not 

 bursting, drupedike, or furnished with a leafy border. Trees or 

 .shrubs with rough leaves and clustered flowers (never in catkins) 

 inhabiting temperate climates, and often forming valuable timber 

 trees. 



1. Ulmus (Elm). — Perianth bell-shaped, 4- to 5-cleft, persistent; 

 stamens 5 ; styles 2 ; capsule thin and leafdike, containing a single 

 seed. (Name, the Latin name of the tree.) 



I. Ulmus (Elm) 



r. U. montana (Scotch or Wych Elm). — -A tall tree, with almost 

 stalkless leaves, which are obliquely ovate and edged with double 

 teeth ; fruit ovate, green, .slightly notched at the top, and with the 

 seed about the centre ; no suckers from the roots. Chiefly found 

 in the north. — Fl. March. Tree. 



2. U. campestris (Common Elm). — A tall tree, very near the 

 last. Fruit deeply notched, and seed in the upper half, near Ihe 

 notch. Growth usually more upright that in TJ . montana. A 

 variety with somewhat pendulous branches fs sometimes erroneously 

 called Wych Elm. A variety is not unfrequcnt in hedges with 

 rough, corky bark on stems and twigs. Hedges, parks, etc. ; 

 common. — Fl. March. Tree. 



Natural Order LXXVH 



AMENTACE.E. — Catkix-bearing Tribe 



Stamens and pistils in separate flowers, and often on different 

 plants ; barren flowers in heads or catkins, composed of scales ; 

 stamens 1-20, inserted on the scales ; fertile flower, clustered, 

 solitary, or in catkins ; ovary usually simple ; stigmas i or more. 

 An extensive Order, containing a large number of trees which are 

 highly valued for their fruit, timber, bark, and other minor pro- 

 ductions. They are most abundant in temperate climates, com- 



