242 APETALOUS EXOGENS 



gl. Flowers perfect; seeds mostly horizontal. 



346. CHEIVOPO X DIUM, L. 



[Gr. Chen, a goose, and Perns, podos, a foot; in allusion to the form of the leaves.] 

 Calyx 5-parted, the lobes finally often keeled. Ovary depressed ; 

 styles 2, very short. Utricle membranaceous, included in the con- 

 nivent 5-angled calyx. Seed horizontal, lenticular, with the margin 

 rather acute ; embryo forming a complete ring round the albumen. 

 Plants smooth, and more or less glaucous-mealy ; flowers greenish, 

 sessile, in spiked, racemose, or panicled clusters. 



1. C. dlbum, L. Leaves glaucous beneath, rhomboid-ovate, sinuate- 

 dentate, cuneate and entire at base ; racemes compact, pulverulent, 

 somewhat leafy. 

 WHITE CHENOPODIUM. Lamb's-quarters. Goose-foot. 



Annual. Stem 3 to 5 or 6 feet high, angular, branched, often striped with green 

 and yellow, sometimes purplish. Leaves 1 to 3 inches long, the lower ones often 

 larger; petioles 1 to 2 or 3 inches in length. Flowers in clusters; calyx depressed, 

 5-angled by the prominent keels of the incurved lobes ; seed dark purple, or nearly 

 black, smooth and shining, lens-shaped, with a small notch on one side. 

 Hob. Gardens, &c. Nat. of Europe. Fl. July. Fr. Octo. 



Obs. A rank, troublesome weed, in our gardens. The young 

 plants are sometimes used as greens, in the spring. 



*fc. C. hy'bridum, L. Leaves green on both sides, cordate-ovate, 

 acuminate, angularly and remotely dentate ; racemes loosely pani- 

 culate, leafless. 

 HYBRID CHENOPODIUM. Maple-leaved Goose-foot. 



Annual. Stem 2 to 3 feet high, rather slender, angular and striate, branched. 

 I/eaves 2 to 4 inches long, thin, bright green; petioles 1 to 2 inches in length. 

 Flowers paniculate, the sub-divisions cymose; terminal panicle long and loose, 

 with divaricate branches. Seed rather large, nearly black, slightly punctate and 

 striate. 

 Sab. Along Schuylkill. Nat. of Europe. Fl. June. Fr. Aug. 



Obs. Naturalized on the banks of the Schuylkill, but still rare. 

 The G. rhombifdlium, enumerated in FL Cestr. ed. 2. is now regarded 

 as a var. of C. firbicum, L. and is, moreover, a doubtful plant, in 

 our Flora. 



34?. AMBRrtf A, Spach. 



[Etymology not ascertained.] 



Flowers nearly as in Chenopodium, but the calyx-lobes not Jceeled, 

 the seed sometimes vertical, and the embryo, instead of forming a 

 complete ring round the albumen, curving merely in the form of a 

 horse-shoe. Styles often 3. Seed with an obtuse margin. Somewhat 

 glandular-pubescent and viscid (never mealy), and often exhaling a 

 strong balsamic odor; flowers greenish, racemose. All the species 

 here enumerated, if not foreigners, are evidently strangers in Chester 

 County. 



1. A. Bbtrys, Moquin. Leaves oblong, sinuate-lobed or pinnatifid ; 

 racemes cymose-paniculate, divergent, leafless. 

 Chenopodium Botrys. //. $ Fl. Cestr. ed. 2. p. 177. 

 Jerusalem Oak. Feather-Geranium. 



