386 CHENOPODIACEAE 



8. Chenopodium Bdtrys L. Annual, glandular-pubescent and viscid, strong-scented. 



Stems erect, 1-G dm. tall, simple or considerably branched, the branches commonly erect : 



leaf-blades 1-5 cm. long, oblong to ovate, irregularly pinnately lobed, entire or toothed, 



spreading ; petioles as long as the blades or shorter : flower-clusters small, in axillary 



cymes : sepals pubescent, lanceolate or oblong-lanceolate, about 1 mm. long, acute or 



somewhat acuminate: utricle depressed, 1.5 mm. broad, enclosed in the calyx: seed 



horizontal or vertical, about 0.8 mm. broad, firmly adherent to the pericarp. 



In waste places and on banks, Nova Scotia to Oregon, south to Georgia and Mexico. Summer 

 and fall. Jerusalem Oak. 



9. ChenopodiuAi ambrosioides L. Annual, glabrous or glandular pubescent, 

 heavy-scented. Stems erect or decumbent, 5-8 dm. long, more or less branched, grooved 

 at maturity : leaf-blades oblong or oblong-lanceolate, 3-10 cm. long, repand-dentate or undu- 

 late or even entire above : flower-clusters in short spikes, these usually surpassed by the 

 accompanying leaves : sepals often yellowish, often 3, rather obtuse : utricle less than 1 mm. 

 in diameter, enclosed in the calyx : seed horizontal or vertical, free, shining. 



In waste places and thickets, Maine to California, Florida, Mexico and tropical America whence 

 naturalized. Summer and fall. Mexican Tea. 



10. Chenopodium anthelminticuin L. Annual or perennial, glandular-pubescent 



or glabrate, heavy-scented. Stems erect or spreading, 5-12 dm. long, ridged: leaf-blades 



lanceolate or oblong to ovate-lanceolate, 3-15 cm. long, acute or acuminate, coarsely toothed 



or incised, cuneate-acuminate at the base, short-petioled : flower-clusters in more or less 



elongated interrupted spikes, these generally surpassing the accompanying leaves : sepals 



glabrous, acute or obtuse, contiguous : utricle about 1 mm. in diameter, enclosed in the 



calyx : seed horizontal or vertical. 



In waste places and thickets, Ontario to Wisconsin, New York, Florida, Texas and Mexico. Nat- 

 uralized from Europe. Summer and fall. Wormseed. 



2. CYCLOLOMA Moq. 



Annual coarse herbs, with dift'usely branched stems. Leaves alternate : blades flat, 

 irregularly toothed. Flowers perfect or pistillate, disposed in panicled spikes, without 

 bractlets. Sepals 5, keeled, each appendaged at maturity by a horizontal wing. Stamens 

 5 : filaments about as long as the calyx. Ovary 1-celled, sessile, hairy : styles 2-3, par- 

 tially united. Utricle depressed, wholly enclosed by the calyx or nearly so. Seed flat, 

 horizontal. Embryo annular in the mealy endosperm. 



1. Cycloloma atriplicifolium (Spreng. ) Coulter. Annual, deep green, often becoming 

 dark purple. Stems bushy-branched, 1.5-5 dm. tall, like the branches striate and 

 angled: leaf-blades lanceolate or oblong, 2-8 cm. long, acuminate, irregularly sinuate- 

 dentate with sharp teeth, narrowed into short petioles : spikes numerous, in open panicles : 

 calyx sometimes pubescent, surrounded by a scarious arose wing : sepals triangular or 

 ovate-triangular : utricle depressed, 2-3 mm. broad, with an area exposed between the 

 sepals as a 5-rayed star. 



On banks and along streams, Manitoba and the Northwest Territory, south to Indiana, Texas and 

 Arizona. Summer. 



3. ATRIPLEX L. 



Annual or perennial herbs or low shrubs, with a scaly often silvery pubescence. 

 Leaves alternate, or some opposite : blades often deltoid or hastate in outline, angularly 

 toothed or sometimes entire. Flowers monoecious or dioecious, in axillary or terminal 

 panicles, or congested axillary spikes, the staminate bractless : sepals 3-5 : stamens 3-5, in- 

 serted at the base of the calyx : filaments distinct or united : anthers 2-celled, opening 

 lengthwise. Pistillate flowers subtended by two more or less united entire or toothed 

 bracts, which are commonly crested, tubercled or winged on the back. Ovary l-celled^ 

 tipped by the 2 subulate or filiform stigmas. Utricle wholly or partially surrounded by 

 the accrescent bracts. Seed erect or nearly horizontal, with a membranous leathery or al- 

 most crustaceous testa. Endosperm mealy. Embryo annular. Orache. 



A. Annual. 



Leaf-blades triangular-hastate or hastate-lanceolate in outline. 1. .4. hastata. 



Leaf-blades oblong, oval or broadest above the middle. 



Fruiting bracts united to above the middle. '2. A. armaria. 



Fruiting bracts united only at the base. 



Styles exserted : fruiting bracts with equal teeth. 3. A. tnbcrculatn. 



Styles included : fruiting bracts with the middle tooth longest. -1. A. cristata. 



