434 ARALIACEAE 
among which are found the small flowers, narrowly linear. The form 
growing in water has finely dissected leaves. Fig. 3, a. Stamens 4. 
6. M. heterophyllum, Michx. (Fig. 6, pl. 105.) VArious-LEAVED 
WATER-MILFOIL. Plant of ponds and still waters. Stems stout. Lower 
leaves dissected into fine capillary segments; the upper, floral leaves, egg- 
shaped or lance-shaped with conspicuous teeth. Flowers with 4 stamens. 
7. M. scabratum, Michx.. (Fig. 7, pl. 105.) PINNATE WATER-MIL- 
FoI. (IM. pinnatum, (Walt.) BSP.) Resembles No. 5, but floral leaves 
are linear, with conspicuous teeth. 
8. M. Farwellii, Morong. (Fig. 8, pl. 105.) FARWELL’s WaATER- 
MILFOIL. Leaves in whorls of 3s or 6s or scattered, narrow, feather- 
parted, the divisions thread-like, in 5 to 7 opposite pairs with minute 
black spines at the axils. Petals 4, oblong; styles 4. Still water. Maine, 
westward. 
Order XV.—UMBELLALES. Order of Umbelliferous 
Plants 
Herbs, shrubs or trees. Flowers in umbels or umbel-like heads. 
Ovary surrounded by the calyx which is superior to it; each cell 
of the ovary containing a single ovule. Calyx segments little de- 
veloped or absent. Stamens free from each other and equal in 
number with, the petals, alternate with them. 
Stamens 5, flowers in umbels. 
Fruit composed of 2 dry carpels, which separate at 
matunty. . .°. . . « « UMBELEIP Eee 
Fruit a fleshy berry . . . . . . ARALIACHAR 
Stamens 4. Trees and shrubs. Flowers in heads or umbel- 
like-groups © @ % ©. .0s.° #2! > 0 «Se si > CORE 
Famity I.—ARALIACEAE. GINSENG Famity 
Herbs, shrubs or trees, perennial. Leaves all compound. Flowers 
small; stamens 5. Fruit a fleshy berry. Calyx tube surrounding 
and adhering to the ovary, 5-toothed. 
Leaves alternate | .+ =. ¢ 57° s8er ie ec. 
Leaves in a whorl... 2. 2 4. (A, 2 "0? ar 
1, ARALIA, L. 
Herbs, shrubs or trees, with alternate compound leaves and small white 
or greenish flowers in umbels or heads. Calyx of 5 divisions; petals 5; 
stamens 5; ovary 5-celled. 
tg ie a ee errr Te er, 5 Bal ee ems G5 ele 
Herbs. 
Umbel compound on a lengthened axis . . . . . . . A. racemosa 
Umbels of about 3 secondary umbels . . . . . . . A. nudicaulis 
Unibel of a single head’, (. 959% "i 8 hs. a te ema 
