Ulmaceae — Cupuliferae. 1 3 1 



III.— PARIETARIA. 



PARIETA'RIA OFFICINA'LIS (91). Pellitory of the wall. 6—8. 



(1269) Stems tufted prostrate or erect I — 2 ft. reddish brittle, branches slen- 

 der leafy, leaves ovato-lanceolate 3-nerved, flowers greenish in axillary 

 clusters with a 3 — 6-lobed involucre mostly perfect, calyx 4-partite, 

 stamens 4, fruit enclosed in the enlarged calyx. Old walls. 



ORDER 67. — Ulmaceae. 



Trees with rough alternate leaves and usually perfect flowers not in cat- 

 kins. Calyx campanulate 4 — 5-cleft persistent. Stamens 4 — 5 perigynous, 

 opposite the lobes of the perianth. Ovary free. Styles and stigmas 2. Fruit 

 a winged samara. Fig. p. 173. 



UL'MUS MONTA'NA (93). Wych-Elm. 4—5. A tree 80—100 ft. 



(1263) high, seed in the centre of the oblong samara, leaves ovate-oblong 

 doubly and trebly serrate unequally rounded at the base. Woods. 



UL'MUS CAMPES'TRIS. Common Elm. 4—5. A tree often 120 



(1264) ft. high, seed above the middle of the obovate samara, leaves as in U. 

 montana but smaller and narrower at the base. Woods. 



ORDER 68. — Cupuliferae. 



Trees or shrubs with alternate stipulate leaves. Flowers monoecious, 

 staminate flowers in catkins, sepals 5 or more or none, stamens 5—20. Pis- 

 tillate flowers sessile in an involucre of free or united bracts, calyx 6-toothed 

 superior, ovary 2 — 3-celled. Fruit indehiscent enclosed in a bony or leathery 

 case formed of the bracts. 



Staminate flowers in a long slender catkin, 510 



Staminate flowers in a globose catkin, .... Fagus I. 



510 Stigmas 3, Quercus II. 



510 Stigmas 2, 511 



511 Fertile catkin minute of few brown scales, . . , Corylus III. 



511 Fertile catkin large of many leafy scales, . . . Carpinus IV. 



CASTANEA VULGARIS— the Spanish Chestnut, is frequent in parks. 



I.— FAGUS. 



FA'GUS SYLVAT'ICA (64). Beech. 4—5. Leaves ovato-oblong 



(1279) somewhat serrate thin and shining silky when young, staminate flowers 



in dense globose pendulous catkins, pistillate flowers i — 3 enclosed in 



a spiny involucre of 4 bracts, stigmas 3, fruit a smooth triangular nut. 



Woods. 



