254 



MANUAL OF BOTANY 



the Sycamore tree. The timber is sometimes used by the 

 cabinet-maker. 



OrderSS. Juglandace^, the Wahiut Order. — Character. — 

 Trees. Leaves alternate, pumate, exstipulate. Flowers unisexual. 

 Male floioers in amenta ; with an irregular calyx, or a simple 

 ■ scale. Female flowers solitary, or in small terminal clusters, or 

 amenta, without a cupule ; calyx superior, regular, 3 — 5-lobed ; 

 ovary inferior, 2 — 4-celIed at the base, 1-celled above; ovule 

 solitary, erect, orthotropous. Fruit called a tryma. SeeA 

 2 — 4-lobed, exalbuminous ; embryo with sinuous oily cotyledons, 

 and a short superior radicle. 



Distribution and Numbers. — Chiefly natives of North 

 America, but a few are found va. the East Indies, Persia, and the 



Fig. 1012. 



Fig. 1013. 



Fig. 1012. Staminate amentum 

 ol the Walnut tree (Juglans 

 regia) : the flowers are se- 

 parated hy scaly bracts. 



Fig. 1013. Seed of the Wal- 

 nut tree. 



Caucasus. Juglans regia, the Walnut tree, is a native of the 

 countries be.tween Greece and Cashmere. Illustrative Genera : 

 — Juglans, Linn. ; Carya, Nuit. There are about 30 species. 



Properties and Uses. — Chiefly important for their valuable 

 timber, and for their oily edible seeds. 



Order 39. MYRicACE.ffi;, the Bog-myrtle Order. — Character. 

 Shrubs or small trees, with alternate, simple, resinous-dotted 

 leaves, which are usually exstipulate. Flowers unisexual, amenta- 

 ceous, monoecious or dioecious, both kinds of flowers in the 

 same or in different catkins. Male flowers aohlamydeous ; 

 stamens definite. Female flowers aohlamydeous, with a 1-celled 

 sessile ovary, 2 styles, and 1 erect orthotropous ovule ; fruit dru- 

 paceous ; seed solitary, erect, without hairs ; embryo without 

 albumen ; radicle superior. 



