ANACARDIACE&. 215 



ba:e ; flowers small, yellowish green, in crowded, simple umbels ; pedicels 

 short and thick ; petals none ; fruit tomentcse when young, nearly smooth 

 when old, with very large upwardly dilated diverging wings. Wood, white, 

 soft. April. 



2. A. SACCHARINUM (Sugar-Maple). Leaves palmately lobed, cordate 

 at base ; sinuses obtuse and shallow ; lobes acuminate, with a few coarse, 

 repand teeth ; flowers pale yellow, on long, pendulous, filiform, villous pedi- 

 cels ; sepals bearded inside ; petals none ; fruit yellowish, with wings i f 

 long. A noble tree of elegant foliage and growth, often cultivated. Its sap 

 yields maple-sugar. May. 



2. ^Esculus. Calyx campanulatc, tubular, 5-toothed. Petals 4-5, 

 more or less unequal. Stamens 6-8, on a disk ; ovary of 3 united carpels. 



JE. HIPPOCASTANUM (Horse-CIiestnut).'Lea.ves digitate; leaflets 7, 

 obovate, abruptly acute, serrate ; flowers large, in pyramidal thyrses or ra- 

 cemes, pink and white ; fruit large, dark chestnut-colored, not eatable. Tree, 

 40- ~o feet high, of elegant growth. June. 



3. Staphylea. Flowers perfect. Sepals 5, colored, persistent, 

 erect. Petals 5. Stamens 5. Styles 3. Capsules membranaceous, 

 3-celled, 3-lobed. -% 



S. TRIFOLIA (Bladdernuf). Leaves ternate, opposite ; leaflets ovate, 

 finely serrate ; stipules caducous ; flowers white, in nodding, axillary racemes ; 

 petals narrow-cbovate ; fruit composed of 3 inflated, united, i-several -seeded 

 carpels. May. 



Order XXVI. ANACARDIACE/E. 



Trees, or shrubs, with a resinous, gummy, milky, or acrid juice. 

 Leaves alternate, not dotted, destitute of stipules. Flowers small, 

 often polygamous, or dioecious. Sepals 5, persistent. Petals as 

 many as the sepals, sometimes none. Stamens as many as the pet- 

 als, alternate with them, inserted on the base of the calyx. Ovary 

 i -celled, nearly or quite free from the calyx. Ovule solitary. Styles 

 3-5, distinct or united. Fruit a drupe, or a bony, i-seeded nut. 



Rhus. Sepals 5, united. Petals 5. Stamens 5. Styles 3. Stig- 

 mas capitate. Fruit a dry drupe, with a bony, i-celled nut. Flowers 

 often dioecious. 



1. R. GLABRA (Sumach). Leases pinnate, 6-i5-foliate ; leaflets lance-ob- 

 long, acuminate, smooth ; flowers small, greenish, in dense, terminal, 

 thyrsoid panicles, followed by small drupes covered with crimson hairs, of a 

 sour taste. A shrub 6-10 feet high, in pastures and thickets. June- July. 



2. R. VENENATA (Dogwood, Poison Sumach). Very glabrous; leaflets 

 7-13, oval, entire ; flowers very small, green, mostly dioecious, in loose 

 panicles ; drupes smooth, greenish, as large as peas. A shrub, in swamps, 

 10-15 f eet high, and exceedingly poisonous to most persons. June. 



