Jones: Flora of Illinois, 51. Chenopodiaceae 119 



5. Brunnichia Banks 



B. cirrhosa Gaertn. Banks of streams, s. III., not common. Pulaski Co., 

 Brendel in 1860; Metropolis, Massac Co., Gleason in 1902. 



51. Chenopodiaceae Dumort. — Goosefoot Family 



1 . Leaves not spine-tipped or subulate. 



2. Flowers perfect, not enclosed in a pair of triangular bracts; perianth present. 

 3. Flowers in clusters; fruit enclosed in the calyx. 



4. Calyx not horizontally winged 1. Chenopodium 



4. Calyx becoming horizontally winged. 



5. Leaves linear or narrowly lanceolate, entire, yellowish green; flowers spicate 



2. Kochia 



5. Leaves sinuate-dentate; flowers paniculate 3. C\)cloloma 



3. Flowers solitary, axillary; fruit exserted from the marcescent calyx; leaves linear 



4. Corispermum 



2. Flowers unisexual, the pistillate enclosed by a pair of triangular bracts; leaves 



narrowly lanceolate to hastate 5. Atriplex 



1 . Leaves subulate, spinescent; stems branched, striate; flowers 1-3 in the axils 



6. Salsola 



1. Chenopodium L. — Goosefoot. Pigweed 

 1 . Plants more or less glandular and aromatic, not at all farinose (mealy) . 

 2. Leaves sinuate-pinnatifid; pericarp not gland-dotted; fruit only partly 

 enclosed by the calyx; roadsides, waste ground, occasional, nat. from 

 Eur. July-Aug. Jerusalem Oak C. botrys L. 



2. Leaves repand-dentate to subentire; pericarp gland-dotted; fruit complete- 



ly enclosed by the calyx; waste ground, common, nat. from S. Am. 

 July-Aug. [C. anthelminticum L.} Mexican Tea C. ambrosio'tdes L. 



1. Plants not glandular or aromatic, but sometimes farinose. 



3. Flowers in globose clusters 1 cm. or more in diameter, forming an inter- 



rupted spike, the calyx becoming red, succulent, and strawberry-like at 

 maturity; leaves triangular to lanceolate; seeds horizontal, dull, 0.8 mm. 

 in diameter; sandy soil, occasional. May-Aug. [Blitum capitatum L.} 

 Strawberry Pigweed C. capitatum (L.) Aschers. 



3. Flowers in smaller glomerules; calyx not succulent. 



4. Leaves sinuately dentate or entire. 



5. Sepals more or less prominently keeled in fruit. 



6. Pericarp loose, readily separating from the seed; leaves thin; seeds 



horizontal. 



7. Leaves green and glabrous or nearly so on both surfaces when 



mature, slender-petioled, lanceolate to ovate, entire, or the 



lower ones sinuate-dentate; woods, common. June-Oct. [C. 



boscianum sensu auth. non Moq.} C. standleyanum Aellen 



7. Leaves densely farinose at least beneath, rather short-petioled, 

 linear or lanceolate, often somewhat hastately toothed; sepals 

 strongly carinate; sandy soil, occasional; native w. of the Mis- 

 sissippi R.; probably adventive in 111. Urbana, G. N. Jones 

 11813. July-Sept. [C. leptophyllum sensu auth., non Nutt.] 

 Narrow-leaved Goosefoot C. praterlcola Rydb. 



