110 DIALYPETALOtfS EXOQENS 



leaves compound, usually verticillate in threes at the summit of the 

 stem ; umbel simple, terminal, pedunculate ; flowers yellowish-green, 

 or white. 



1. I*, quiliquefolium, L. Root fusiform; leaflets mostly in 

 fives, obovate ; styles 2 ; fruit compressed, reniform or bigibbous, 

 succulent, 2-celled. 



FIVE-LEAVED PANAX. Ginseng. 



Root 3 to 6 inches long, and about half an inch in diameter, often forked, rugose, 

 whitish. Stem 9 to 18 inches high, simple, angular, smooth. Petioles 3 or 4 inches 

 long. Leaflets unequal, the 3 principal ones 3 to 5 inches in length, the lateral 

 ones much smaller ; petiolules % of an inch to an inch long. Umbel many-flowered, 

 the central flowers often abortive, fruit drupaceous, shining crimson when ma- 

 ture. 

 Ilab. Rich woods; Brandy wine: rare. Fl. July. Fr. Sept. 



Obs. This plant is interesting, as having afforded an article of 

 some commercial importance, in our trade with China, rather 

 than from any inherent virtues. 



2. I", trifolium, L. Root globular; leaflets in threes, or some- 

 times fives, lance-oblong; flowers dioicous; styles 3; fruit trigo- 

 nous-ovoid, subcoriaceous and dry, 3-celled. 



THREE-LEAVED PANAX. Dwarf Ginseng. 



Root a globose tuber about half an inch in diameter, rather deep in the ground. 

 Stem 4 to 6 or 8 inches high. Petioles half an inch to an inch long. Leaflets une- 

 qual, half an inch to 2 or 3 inches in length, nearly sessile. Staminate umbel 

 inany-flowered ; pistillate umbel fewer-flowered (the flowers rarely perfect). Fruit 

 somewhat 3-lobed, rugose, pale greenish-yellow when mature. 

 Hob. Moist shaded grounds : frequent. Fl. April. Fr. May. 



Obs. The pistillate plant is usually larger than the staminate one. 



ORDER XLVL CORNA^CEAE. 



Shrubs, or small trees (rarely herbaceous branches from a woody rhizoma) ; leaves 

 mostly opposite, simple and entire, petiolate, without stipules; calyx-tube adherent 

 to the ovary; petals 4, valvate in the bud; stamens 4, inserted with the petals on 

 the margin of the disk which crowns the ovary; style 1; fruit drupaceous, mostly 

 2-celled, 2-seeded; embryo nearly as long as the fleshy albumen. 



172. CORPUS, Tournef. 



[Latin, Cornu, a horn ; perhaps from the horny toughness of the wood.] 

 Calyx minutely 4-toothed. Petals oblong, spreading. Drupes 

 berry-like, globose, or oval; nut 2- or 3-celled. Shrubs, or small 

 trees, in this County. 



f Flowers cymose ; involucre none ; fruit globose. 



1. C. alternif olia, L. Branches greenish ; leaves somewhat 

 alternate, oval, hoary beneath ; drupes bluish black. 

 ALTERNATE-LEAVED CORNUS. 



Stem 10 to 15 or 20 feet high; branches irregularly alternate, spreading, streaked 

 with oblong white warts. Leaves about 3 inches long; petioles about au inch in 

 length. Flowers yellowish-white, in depressed spreading cymes. 

 06. Moist thickets; fence-rows, &c.: frequent. FL May. Fr. Aug. 



