VOIv. II.] 



WATER-MILFOIL FAMILY. 



505 



9. Myriophyllum proserpinacoides Gill. 



(Fig. 2625.) 



Myriophyllum proserpinacoides Gill.; Hook. Bot. Misc. 

 3: 3i3- 1833. 



Dioecious. Leaves all alike and submerged, glabrous, 

 somewhat glaucous, pectinate-pinnatifid in crowded 

 whorls of 4's and 5*8, 7 // -io // long; segments capillary or 

 sometimes linear-spatulate, 20-25 * n number, about 

 2j /x long, minutely cuspidate; pistillate flowers axil- 

 lary, about %" high, without petals; stigmas 4, white, 

 plumose; young carpels glabrous; small white hair-like 

 bracts are borne at the bases of the leaves and among 

 the flowers. 



In Hopkins' Pond, near Haddonfield, N. ]. (S. N. Rhoads, 

 1890). Apparently established. Introduced first into the 

 tanks for aquatic plants at Mr. E. D. Sturtevant's nursery, 

 at Bordentown, N. J. Native of Chili. Staminate flowers 

 not seen, and the plant referred to this species with some 

 hesitation. 



Chilian Water-Milfoil. 



A 



Family 90. ARALIACEAE Vent. Tabl. 3 : 2. 

 GINSENG FAMILY. 



1799. 



Herbs, shrubs or trees, with alternate or verticillate (rarely opposite) leaves, 

 and perfect or polygamous flowers in umbels, heads, racemes or panicles. 

 Calyx-tube adnate to the ovary, its limb truncate or toothed. Petals usually 5, 

 valvate or slightly imbricate, sometimes cohering together, inserted on the mar- 

 gin of the calyx. Stamens as many as the petals and alternate with them 

 (rarely more), inserted on the epigynous disk; filaments filiform or short; 

 anthers ovoid or oblong, introrse. Ovary inferior, i-several-celled; styles as 

 many as the cavities of the ovary; ovules i in each cavity, pendulous, anatropous. 

 Fruit a berry or drupe. Seeds flattened, or somewhat 3-angled, the testa thin; 

 endosperm copious, fleshy; embryo small, near the hilum; cotyledons ovate or 

 oblong. 



About 52 genera and 450 species, widely distributed in temperate and tropical regions. 



Herbs, shrubs or trees; leaves alternate, decompound; styles 5. 

 Herbs; leaves verticillate, digi lately compound; styles 2-3. 



1. Ara.Ua. 



2. Panax. 



i. ARALIA t. Sp. PI. 273. 1753. 



Perennial herbs, shrubs or trees, with alternate pinnately or ternately decompound 

 leaves, and small mostly perfect flowers, in racemose corymbose or paniculate umbels. 

 Flowers white or greenish. Petioles sheathing at the base. Stipules none or inconspicuous. 

 Pedicels jointed below the flowers. Calyx truncate or 5-toothed. Petals 5, spreading, 

 obtuse, or with short inflexed points, valvate or slightly imbricate. Stamens 5. Disk de- 

 pressed. Ovary 5-celled; styles 5. Fruit a small berry enclosing about 5 seeds. 



About 27 species, natives of North America and Asia, 

 the western and southwestern United States. 



Besides the following, 2 others occur in 



Umbels numerous, panicled or racemose. 



Spiny shrub or tree; leaflets thick, ovate. 



Branching unarmed herb; leaflets thin, large, cordate. 

 Umbels 2-7, terminal or corymbose. 



Plant glabrate; leaf and peduncle arising from the rootstock. 



Plant bristly or hispid; stem leafy, erect. 



1. A. spinosa. 



2. A. racemosa. 



3. A. nudicaulis. 



4. A. hispida. 



