74 CHENOPODIACEAE 



5. ROUBIEVA Moq. Ann. Sci. Nat. II. 1 : 292. 1834. 



Perennial strong-scented herbs, with narrow, pinnatifid leaves. Flowers minute, soli- 

 tary or in small axillary clusters. Calyx -tube turbinate, becoming: narrowed at the throat, 

 ovoid and strongly reticulate in fruit, 3-5-toothed. Stamens 5, exserted. Styles 3, elon- 

 gated. Pericarp thin, glandular, adherent; seed vertical; embryo forming a complete 

 ring. [Name in honor of G. J. Roubieu, French botanist.] 



A monotypic genus of South America. Closely related to Chenopodium, 



1. Roubieva multifida (L.) Moq. Cut-leaved Goosefoot. Fig. 1496. 



Chenopodium tnultifidum L. Sp. PI. 220. 1753. 



Roubieva multifida Moq. Ann. Sci. Nat. II. 1 : 293. pi. 10. 1834. 



Stems branching from the base, prostrate or ascending, 2-10 dm. long, leafy and floriferous 

 throughout, glandular-pubescent. Leaves linear-oblong to lanceolate in outline, pinnatifid, the 

 lobes linear-oblong, entire or toothed, the lower leaves short-petioled, the upper sessile ; flowers 

 perfect and pistillate on the same plant; fruiting calyx 2 mm. long, strongly reticulate. 



Waste places and ballast, mostly along the coast. Portland, Oregon, to southern California; abundant at 

 San Francisco. Native of Chile. Aug.-Nov. 



6. CYCLOLOMA Moq. Chenop. Enum. 17. 1840. 



Annual herbs, with alternate petiolate leaves. Flowers small, perfect or pistillate, 

 bractless, sessile, solitary or clustered. Calyx 5-lobed, the lobes inflexed, strongly carinate, 

 the tube at length appendaged with a continuous horizontal scarious wing. Stamens 5. 

 Styles 3, short, free or united. Utricle depressed-globose; pericarp membranaceous, free 

 from the seed ; embryo annular. [Name Greek, meaning circle and border, in reference 

 to the calyx wing.] 



A monotypic North American genus. 



1. Cycloloma atriplicifolium (Spreng.) Coult. Winged Pigweed. Fig. 1497. 



S'alsola atriplicifolia Spreng. Bot. Gard. Hal. Nachtr. 1: 35. 1801. 

 Kochia atriplicifolia Roth, Neue Beitr. 1: 177. 1802. 

 Salsola platyphylla Michx. Fl. Bor. Amer. 1: 174. 1803. 

 Cycloloma atriplicifolium Coult. Mem. Torrey Club 5: 143. 1894. 



Diffusely branched, 1.5-5 dm. high and usually as broad, tomentose when young, becoming 

 glabrate, the branches slender, angled. Leaves deciduous in age, 2-8 cm. long, oblong in outline, 

 sinuate-toothed, the teeth mucronate ; inflorescence paniculately much branched ; calyx 3-4 mm. 

 broad, often becoming purple in age. 



Sandy soil, mainly Sonoran Zones; Manitoba to Indiana, south to Texas and Arizona; adventive in southern 

 California. Type locality : North America. June— Sept. 



7. MONOLEPIS Schrad. Ind. Sem. Hort. Goetting. 1830: 4. 1830; 



Linnaea 6: Lit.-Ber. 73. 1831. 



Low branching annual herbs, with often succulent farinose or glabrous herbage. 

 Leaves alternate, sessile or petioled, entire, lobed or toothed. Flowers polygamous or 

 perfect, in small axillary clusters. Calyx of one persistent herbaceous sepal, unchanged 

 in fruit. Stamen 1 or wanting. Styles 2, slender. Utricle flat, the pericarp adherent to 

 the vertical seed ; embryo nearly a complete ring. [Name Greek, meaning one and scale, 

 in reference to the solitary sepal.] 



Three species, natives of western North America. Type species, Chenopodium trifidum Trev. 

 Stems not dichotomously branched, more or less fleshy. 



Pericarp pitted; leaves hastate. 1. M. Nuttalliana. 



Pericarp papillose; leaves entire. 2. M. spathulata. 



Stems dichotomously branched, very slender; pericarp tuberculate. 3. M. pusilla. 



. 1. Monolepis Nuttalliana (Schult.) Greene. Nuttall's Monolepis. 



Fig. 1498. 



Blitum chenopodioides Nutt. Gen. 1: 4. 1818. Not Lam. 1783. 



Blitum Nuttallianum Schult. in Roem. & Sch. Syst. Veg. Mant. 1: 65. 1822. 



Chenopodium trifidum Trev. Ind. Sem. Vratisl. 1829. 



Monolepis Nuttalliana Greene, Fl. Fran. 168. 1891. 



Herbage mealy when young, becoming glabrous or nearly so, stems stout, succulent, with 

 many ascending branches. Leaves lanceolate, short-petioled or the upper sessile, 1-6 cm. long, 

 narrowed at base, hastately lobed, the terminal lobe linear or linear-oblong, entire or remotely 

 toothed ; flower clusters sessile ; sepal oblanceolate or spatulate ; pericarp minutely pitted, 1 mm. 

 broad. 



Dry or alkaline soils, mainly Sonoran Zones; Alberta and Manitoba to Texas, Sonora, and southern Cali- 

 fornia, also in Siberia and Patagonia. Type locality: arid soils near the banks of the Missouri River. March- 

 Sept. Patata. 



