124 Chenopodiaceae 



1. APHANISMA Nutt. 



Slender glabrous annuals, with alternate sessile entire 

 leaves, and axillary mostly solitary perfect bractless 

 flowers. Calyx 3-cleft, with concave segments un- 

 changed in fruit. Stamen 1 ; filament short. Ovary 

 depressed ; style shortly 2-3-cleft ; pericarp somewhat 

 5-angled, rather thick and indurate. Seed horizontal, 

 with very thin crustaceous testa. Embryo annular sur- 

 rounding the copious endosperm. 



1. A. blitoides Nutt. Stems ascending, branched, 3-7.5 dm. 

 high; leaves thin, oblanceolate to ovate-oblong, the upper ones 

 ovate, acute, 6-15 mm. long; calyx minute, its lobes ovate, 

 obtuse, closely appressed to the base of the fruit; fruit 1 mm. 

 broad; seed shining, punctulate-rugose. 



San Pedro, Davidson; Catalina Island. 



2. CHENOPODIUM L. GOOSEFOOT. 



Annual or rarely perennial herbs, mostly introduced 

 weeds. Leaves often white-mealy, sometimes glandular, 

 alternate, petioled. Flowers perfect, bractless, clustered 

 in axillary or terminal often panicled spikes. Calyx 

 herbaceous, 3-4-parted or mostly 5-parted ; the lobes 

 usually connate or crested, more or less closely covering 

 the fruit. Pericarp membranous, closely investing the 

 lenticular or subglobose, horizontal or vertical seed. 

 Embryo annular or curved around the copious endo- 

 sperm. 



* Annuals; ours introduced. 



*- Leaves white-mealy or glabrous. 



1. C. album L. Stems erect, 0.5-2 m. high, branches ascend- 

 ing; leaves rhombic-ovate or the upper lanceolate, narrowed at 

 the base, acute or sometimes obtuse at the apex, white-mealy 

 beneath, dentate or sinuate or the upper entire, 2-6 cm. long; 



