42 CHENOPODIACEAE. 



Order CHENOPODIALES. 



Herbs, often partially woody, or shrubs, or trees. Leaves alternate 

 or opposite, occasionally scale-like. Flowers mostly perfect, sometimes 

 monoecious or dioecious. Calyx usually present, the sepals mainly sepa- 

 rate. Corolla wanting, or present and of minute or large petals. Androe- 

 cium of 1-several stamens. Gynoecium of a single carpel or of several 

 united carpels, the ovary mostly superior. Fruit an achene, utricle or a 

 berry, often a capsule or a pyxis, or sometimes an anthocarp. 



Fruit a utricle, achene or berry, sometimes an anthocarp, not valvate, or merely 



circumscissile. 



Fruit various, not an anthocarp. 

 Fruit utricular. 



Bracts not scarious : stipules wanting. 



Erect or diffuse plants. Fam. 1. CHEXOPODIACEAE. 



Climbing vines. Fam. 2. BASELLACEAE. 



Bracts or stipules scarious. Fam. 3. AMARAXTHACEAE. 



Fruit baccate or an achene, or aggregate. 



Fruit an achene or a berry : flowers not 



in cones. 



Hypanthium wanting : stamens borne be- 

 low the ovary : stigmas not penicellate. Fam. 4. PHTTOLACCACEAE. 

 Hypanthium present : stamens borne on the 

 edge of the hypanthium : stigma peni- 

 cellate. Fam. 5. PETIVERIACEAE. 

 Fruit aggregate : flowers in axillary cones. Fam. 6. BATIDACEAE. 

 Fruit an anthocarp, the achenes surrounded by the 



calyx-tube. Fam. 7. ALLIONIACEAE. 



Fruit a capsule dehiscent by apical or longitudinal 



valves. 



Ovary several-celled : corolla wanting. Fam. 8. TETRAGONIACEAE. 



Ovary 1-celled : corolla mostly present. Fam. 9. POBTULACACEAE. 



FAMILY 1. CHENOPODIACEAE. GOOSEFOOT FAMILY. 



Herbs or woody plants. Leaves alternate or opposite : blades simple. 

 Flowers perfect, polygamous, monoecious, or dioecious, mostly in con- 

 gested spikes. Calyx of 1, 2, 3, 4, or 5 persistent sepals. Corolla want- 

 ing. Androecium of as many stamens as there are sepals. Gynoecium of 

 2 or more united carpels. Ovary 1-celled. Fruit a utricle, sometimes 

 achene-like. 



Embryo annular or conduplicate : endosperm copious (except in Salicornia) . 

 Leaves with dilated blades : endosperm copious. 



Flowers perfect, or some of them pistillate : calyx fleshy or herbaceous. 



1. CHENOPODICJI. 



Flowers dioecious or monoecious : pistillate flowers with- 

 out a calyx : fruit enclosed in 2 bracts. -. ATRIPLEX. 

 Leaves mere scales: endosperm wanting. 3. SALICOBMA. 

 Embryo spirally coiled : endosperm wanting or scant. 4. DONDIA. 



1. CHENOPODIUM L. Mealy or aromatic glandular herbs. Leaves 

 alternate: blades mainly toothed, pinnatifid, or pinnately lobed: sepals flat, 

 keeled and often hooded. Anther-sacs commonly contiguous. Ovary de- 

 pressed or elongate. 



Sepals flat or merely concave : embryo not forming a circle : glandular aromatic 

 plants. 1. C. anthelmintieiim. 



Sepals hooded, usually keeled at maturity : embryo forming a 



circle : mealy plants, odorless or heavy-scented. 

 Sepals strongly keeled : leaf-blades blunt-toothed : seeds 



over 1 mm. wide. 2. C. lanccolatum. 



Sepals slightly keeled : leaf-blades sharp-toothed : seeds 1 



mm. wide or less. 3. C. murale. 



