i6 



CHEXOPODIACEAE. 



VOL. II. 



4. CYCLOLOMA Moq. Enum. Chenop. 17. 1840. 



An annual diffusely branched glabrous or cobwebby-pubescent herb, with alternate peti- 

 oled irregularly toothed leaves, and small sessile bractless perfect or pistillate flowers in 

 panicled interrupted spikes. Calyx 5-lobed, the lobes keeled in flower, a thin horizontal 

 irregularly dentate wing developing below them in fruit. Stamens 5. Styles 2-3. Fruit 

 (except its summit) enclosed by the calyx, depressed. Seed horizontal; embryo a complete 

 ring in the mealy endosperm. [Greek, circle-border, alluding to the calyx-wing.] 



A monotypic genus of north central North America. 



i. Cycloloma atriplicifolium (Spreng.) Coult. Winged Pigweed. Fig. 1694. 



Kochia atriplicifolia Spreng. Xactr. Fl. Hal. 2 : 35. 1801. 

 Cycloloma platyphyllum Moq. Enum. Chenop. 18. 1840. 

 C. atriplicifolium Coult. Mem. Torr. Club 5: 143. 1894. 



Pale green or becoming dark purple, bushy- 

 branched, 6'-2o' high, the stem and branches angu- 

 lar and striate. Leaves lanceolate, mostly acumi- 

 nate at the apex, narrowed into slender petioles, 

 irregularly sinuate-dentate with acute teeth, i'-3' 

 long or the upper much smaller; spikes numerous 

 in terminal panicles, loosely flowered, i'-3' long, 

 slender ; fruit, including the winged calyx, 2" broad ; 

 calyx-lobes not completely covering the summit of 

 the utricle, which appears as a 5-rayed area. 



Along streams and on banks, Manitoba to Indiana 

 and Illinois, Nebraska and Arizona. Tumble-weed. 

 Occasional in waste grounds farther east. Summer. 



5. KOCHIA Roth; Schrad. Journ. Bot. i: 307. pi. 2. 1799. 



Perennial or annual herbs or low shrubs, with alternate sessile narrow entire leaves, and 

 perfect or pistillate flowers, sometimes bracteolate, clustered in the axils. Calyx 5-lobed, 

 herbaceous or membranous, wingless, or sometimes developing a horizontal wing, enclosing 

 the fruit. Stamens 3-5, their filaments linear. Ovary ovoid, narrowed upward into the 

 style; stigmas 2. Utricle pear-shaped or oblong, the pericarp membranous, not adherent 

 to the seed. Seed inverted; the testa thin; embryo annular; endosperm none. [Name in 

 honor of W. D. J. Koch, 1771-1849, Director of the Botanical Garden at Erlangen.] 



About 35 species, mostly natives of the Old World, the following introduced from Europe. An 

 indigenous species, K. americana, occurs in the western United States. Type species: Kochia 

 Scoparia (L.) Roth. 



i. Kochia Scoparia (L.) Roth. Kochia. 

 Fig. 1695. 



Chenopodium Scoparia L. Sp. PI. 221. 1753. 

 Kochia Scoparia Roth ; Schrad. Neues Journ. Bot. 3 : 

 85. 1809. 



Annual, pubescent or becoming glabrate, stem 

 erect, slender, rather strict, branched, leafy, l- 

 2i tall. Leaves linear-lanceolate or linear, cili- 

 ate, acuminate at the apex, 1-2' long, i"-2" wide, 

 the upper gradually smaller; flowers sessile, in 

 the axils of the upper leaves, forming short dense 

 bracted spikes; fruiting calyx-segments each with 

 a short triangular horizontal wing. 



In waste places, Ontario, Vermont and northern 

 New York. Adventive from Europe. Native also of 

 Asia. Belvedere-, broom- or summer-cypress. July- 



Bassia hirsuta, a related pubescent annual, native of 

 Europe, has been found in Massachusetts and New 

 Jersey. Its fruiting calyx is not winged. 



