Cheiiopodiiim.] cvii. cnENOPODiACE.E (baker axd clarke). 77 



1. OHENOPODIUM, Linn. ; Benth. et Hook. f. Gen. PI. iii. 51. 



Flowers very small, mostly 2-sexual. Perianth of 5 lobes united 

 below ; lobes triangular or oblong, persistent, herbaceous in fruit. 

 Stamens 5 or fewer ; filaments short. Ovary superior, sessile, ovoid, 

 smooth or often scabrid or glandular in the upper part; styles or 

 stigmas 2 (or in C. amhrosioides 3), linear ; ovule 1, usually oblique on 

 a short basal stalk. Fruit a membranous utricle surrounded by or 

 enclosed in the perianth. Seed globose, compressed, usually horizontal, 

 brown or black, nearly or quite smooth ; embryo annular, surround- 

 ing or partly surrounding the albumen. — Herbs. Stems not trans- 

 versely marked nor as though jointed. Leaves alternate, petioled ; 

 blade flat, often toothed or pinnatitid. Flowers numerous ; cymes 

 axillary and running into copious terminal panicles, leafy or more often 

 nearly leafless ; bracts (to the flowers) none. 



Species 50; mostly weeds, spreading throughout the world, abounding in tem- 

 perate regions. 



♦Ultimate branches of infiorcscence straight, often 

 1-2 in. long, with the tiower-clusters sessile on 

 them, without stalked glands. Periantli-seg- 

 nients mealy, without hairs or stalked glands. 

 Embryo forming one complete circle round the 

 albumen. 

 Styles 2. 



Leaves snbentire, or obscurely lobed, or re- 

 motely toothed. 

 Leaves ovate, base obvcrsely triangular . . 1. C. album. 



Leaves subcjuadrate, base very obtuse . . 2. C opuli folium. 



Leaves with maiiy teeth, sometimes twice 



serrate . . . . . . . 3. C. murale. 



Styles 3. Leaves oblong . . . . . 4. C. amhrosioides, 



**Ultimate branches of inflorescence short, dicho- 

 tomous, slender, divaricate and often zigzag, 

 papillose or glaudnlar. Perianth-segments with 

 stalked glands and no meal. Embryo forming 

 about f of a circle round tlie albumen. 

 Leaves broad in outline, deiply pimiatitid. 



Perianth-segments oblong, not keeled u})vvards . 5. C. JSotrys. 

 Perianth-segments triangular, keeled . , . <>. C. schraderiannm. 



Leaves oblong, shallowly tootlu'd . , , . 7. C. suberifolium. 



1. C. album, Li)i7i, Sp. PI. ed. i. 210, and ed. ii. 311). Suberect, 

 1-3 ft. high. Leaves more or less mealy ; blade often 1-1 h by J-| in., 

 ovate or elliptic, subentire, obscurely lobed, or remotely toothed ; 

 petioles of most shorter than the blade. Panicles axillary, running into 

 a large terminal nearly leafless inflorescence ; ultimate branches nearly 

 straight, linear, not papillosje- scabrid. Peri;inth - segments ovate- 

 triangular, mealy, thickened (hardly keeled) on the back, tips in fruit 

 folded over the horizontal seed. Ovary glandular in the upper part ; 

 styles 2. Nut dark brown, minutely puberulous, flat ; the embryo 



