Dicotyledones. 27 



i. Cypripedium pubescens, Willd. (L., pubescens, becoming downy.) LARGER 

 YELLOW LADY'S SLIPPER. Leafy stems from i to 2 feet high. Leaves broadly 

 oval or elliptical; both leaves and stems pubescent. Sepals elongate-lanceolate. 

 Lip much inflated, from i to 2 inches long, pale yellow with purple lines. In bogs 

 or woods. 



n. ORCHIS. 



(The ancient Greek name.) 



Stems scapelike, from i- to 2-leaved at the base. Roots fleshy- 

 fibrous. Flowers in short terminal spikes. Sepals and petals similar. 

 Anther i with divergent sacs ; pollinia attached by means of a caudicle 

 to a basal viscid disk, which is inclosed in a pouch. 



i. Orchis spectabilis, L. (L., spectabilis, showy.) SHOWY ORCHIS. Stems 

 4~5-angled ; 2 obovate leaves borne near the base, 3 to 6 inches long. Spikes 3-6- 

 flowered. Sepals and lateral petals connivent above, pinkish purple in color ; lip 

 whitish and obtusely spurred. In rich woods. 



Subclass 2. DICOTYLEDONES. 



Embryo in the seed with 2 cotyledons, stem differentiated into bark, 

 wood, and pith, the vascular bundles being laid down in the form of a 

 ring, and possessed of a cambium zone. Leaves mostly netted-veined. 

 Parts of the flower usually in one or more whorls of fours or fives. 



JUGLANDACE^. WALNUT FAMILY. 



Trees. Leaves alternate and pinnately compound. Flowers monoe- 

 cious ; the staminate in aments, and the pistillate occurring singly or a 

 few in a cluster. Staminate flowers of 3-many stamens and an irregu- 

 lar calyx; pistillate flowers of a single pistil and a 4~5-lobed calyx 

 adherent to the ovary. Ovary incompletely 2-4-celled with a single 

 ovule. Fruit a drupe with a fibrous or woody husk inclosing a bony 

 nut. Embryo large, fleshy and oily, the crumpled cotyledons deeply 

 2-lobed. 



I. JUGLANS. Walnut. 

 (L., Jovis glans, the nut of Jupiter.) 



Staminate flowers in solitary aments, produced from buds on stems 

 of the previous year's growth ; stamens 1 2-40 ; pistillate flowers borne 

 singly or in groups at the end of the current season's growth, 4 small 

 petals borne in the sinuses of the 4-toothed calyx. Drupe large and 



