CHENOPODIACE.E. (OOOSEFOOT FAMILY.) 431 



1. CYCLOLOMA, Moquin. WINGED PIGWEED. 



Flowers perfect or pistillate, bractless. Calyx 5-cleft, with the concave 

 lobes strongly keeled, enclosing the depressed fruit, at length appendaged 

 with a broad and continuous horizontal scarious wing. Stamens 5. Styles 3 

 (rarely 2). Seed horizontal, flat ; coats crustaceous. Embryo encircling the 

 mealy albumen. An annual and much-branched coarse herb, with alternate 

 sinuate-toothed petioled leaves, and very small scattered sessile flowers in open 

 panicles. (Name composed of /cwcAoJ, a circle, and \ui/u.a, a border, from the 

 encircling wing of the calyx.) 



1. C. platyphyllum, Moquin. Diffuse (6-15' high), more or less 

 arachnoid-pubescent or glabrate, light green or often deep purple. Sandy 

 soil, Minn, to W. 111., S. Ind., Ark., and westward across the plains. 



2. KO CHI A, Roth. 



Characters nearly as in Cycloloma, but the seed-coat membranaceotis and 

 the albumen wanting. Annuals or snffruticose perennials, with flat or more 

 usually linear and terete leaves. (Named for \V. D. J. Koch, a German 

 botanist.) 



K. scopARiA, Schrad. Annual, erect, puberulent or glabrate, branching; 

 leaves narrowly lanceolate to linear ; flowers in small axillary clusters, ses- 

 sile, each sepal developing a thick wing. Sparingly introduced ; Vt., Ont., 

 and 111. (Nat. from Eu.) 



3. CHENOPODIUM, Tourn. GOOSEFOOT. PIGWEED. 



Flowers perfect, all bractless. Calyx 5- (rarely 4-) parted or lobed, un- 

 changed in fruit or becoming succulent and berry -like, more or less enveloping 

 the depressed fruit. Stamens mostly 5 ; filaments filiform. Styles 2, rarely 3. 

 Seed horizontal or vertical, lenticular ; the coat crustaceous; embryo coiled 

 partly or fully round the mealy albumen. Weeds, usually with a white 

 mealiness, or glandular. Flowers sessile in small clusters collected in spiked 

 panicles. (Named from x 1 ^"' a S se , ar "d irovs,foot, in allusion to the shape 

 of the leaves.) Our species are mostly annuals, flowering through late 

 summer and autumn, growing around dwellings, in manured soil, cultivated 

 grounds, and waste places. 

 1. Annual, more or less mealy, not glandular nor aromatic ; fruiting calyx 



dry ; seed horizontal; embryo a complete ring. 



* Pericarp very easily separated from the seed ; leaves entire or rarely sinuate- 

 dentate. 



1. C. Boscianum, Moq. Erect, slender (2 high), loosely branched, 

 often nearly glabrous ; leaves oblong- to linear-lanceolate (1 -2' long), attenuate 

 into a slender petiole, acute, the lower sinuate-dentate or often all entire; 

 flowers small, solitary or in small clusters upon the slender branchlets ; calyx 

 not strongly carinate. (C. album, var. Boscianum, Gray, Manual.) N. Y. to 

 Minn., south to N. C. and Tex. 



2. C. leptophyllum, Nutt. Densely mealy or rarely nearly glabrous 

 (i-H high), simple or branched, often strict; leaves linear (-!' long), 

 entire, rather shortly petioled ; flowers closely clustered, in dense or interrupted 

 spikelets ; calyx-lobes stronr/ly carinate. Sea-coast, Conn, to N. J., north 

 shore of L. Erie, and from Dak. to Col., N. Mex., and westward. 



