GOOSEFOOT FAMILY 243 



stigmas slender. Seed vertical, shining, separating from the pericarp. Endo- 

 sperm mealy. 



Leaves more or less dentate, truncate or broadly cuneate at the base; inflorescence dense; 

 glomerules 5-10 mm. in diameter. 



Inflorescence naked above; seeds with acute margins. 1. B. capitatum. 



Inflorescence leafy throughout; seeds round-margined. 2. B. virgatum. ' 



Leaves entire, except the hastate teeth at the cuneate base; inflorescence slender and 



naked above; glomerules 3-6 mm. in diameter. 3. B. hastatum. 



1. B. capitatum L. Stem simple or branched from the base, 3-6 dm. high; 

 leaves broadly triangular to lanceolate, 3-7 cm. long; the uppermost entire, 

 rather thick; flowers in rather large clusters in the axils of the upper leaves and 

 in a terminal spike; sepals acute or acutish. In rocky soil: N.S. N.J. N.M. 

 Calif. Alaska; Eurasia. Submont. Mont. My-Au. 



2. B. virgatum L. Stem branched throughout, 1.5-8 dm. high; leaf-blades 

 triangular to rhombic-oblong, 2-9 cm. long, coarsely laciniate-dentate, the upper 

 smaller and sharply hastate; glomerules large, all axillary; sepals rounded. 

 Waste places: Ore. Ida. Wash.; Mass. N.Y.; adventive from the Old 

 World. 



3. B. hastatum Rydb. Stem slender, 2-4 dm. high; leaves very thin; 

 blades 3-7 cm. long, ovate or ovate-lanceolate in outline, the upper ones smaller, 

 not hastate: flowers in the upper axils and in a slender interrupted terminal 

 spike. Stony ground: Wyo. 'Colo. Nev. Submont. Mont. Jl-S. 



3. MONOLEPIS Schrad. POVERTY WEED. 



Low branching annuals, with alternate leaves. Flowers small, perfect or 

 polygamous, in small axillary clusters, without bracts. Calyx of a single per- 

 bistent sepal. Stamen 1. Ovary 1-celled; styles 2; stigmas filiform. Seed 

 vertical, flattened. Endosperm copious, mealy. 



Leaves lanceolate, hastately lobed; flower-clusters several-flowered; pericarp somewhat 

 fleshy. 1. M. Nuttalliana. 



I -eaves spatulate to linear-spatulate, entire; pericarp thin. 



Flower-clusters 10-20-flowered; pericarp easily separating from the seed. 



2. Al. spathulata. 

 Flower-clusters 1-3-flowered; pericarp adherent to the seed. 3. M. pusilla. 



1. M. Nuttalliana (Schultes) Engelm. Annual; stem decumbent or ascend- 

 ing, divaricately branched, 1-3 dm. high; leaves short-petioled or subsessile; 

 blades thick, 2-7 cm. long, acute at both ends, sparingly sinuate-dentate or entire; 

 sepal fleshy and foliaceous, oblanceolate or spatulate; pericarp adherent to the 

 seed. M. chenopodioides Moq. Saline soils: Man. Minn. Tex. N.M. 

 Calif. Wash.; Sonora; Siberia. Plain Mont. Mr-S. 



2. M. spathulata A. Gray. Stem decumbent or ascending, branched at 

 the base, 7-15 cm. long; leaves short-petioled, 1-2 cm. long; blades spatulate, 

 thick, acute, entire; sepal spatulate, obtuse; seed 0.5 mm. broad. Saline soil: 

 Calif. 'Ida. Ore. Son. 



3. M. pusilla Torr. Stem erect, dichotomously branched, 5-15 cm. high, 

 somewhat mealy, glabrate; leaves subsessile, oblong-spatulate, obtuse, 5-15 

 mm. long, entire; seeds less than 0.5 mm. broad. Alkaline valleys and sandy 

 plains: Wyo. Colo. Calif. Wash. Son. Submont. My-Jl. 



4. CYCLOLOMA Moq. WINGED PIGWEED, TUMBLEWEED. 



Diffusely branched coarse annuals, with alternate toothed leaves. Flowers 

 polygamous, i. e., perfect and pistillate, in paniculate spikes, without bracts. 

 Sepals 5, keeled, each at maturity with a horizontal wing. Stamens 5. Ovary 

 1-celled, hairy; styles 2 or 3, partially united. Utricle depressed, enclosed in 

 the calyx. Seed flat, horizontal. Endosperm mealy. 



1. C. atriplicifolium (Spreng.) Coult. Stem erect, divaricately branched, 

 3-6 dm. high; leaves short-petioled or sessile; blades lanceolate or ovate, coarsely 

 sinuately dentate, acute at the apex, cuneate at the base, 2-7 cm. long; wing of 

 the calyx irregularly lobed and toothed, 4-5 mm. in diameter, covering the 



