84 PROCEEDINGS OF THE AMERICAN ACADEMY 



** Embryo flat-spiral, 



2. Sarcobatus. Flowers monoecious or dioecious, dimorphous, without 

 bracts, the staminate in aments, the pistillate axillary and solitary ; fruiting 

 calyx a coriaceous sac, transversely winged : seed vertical, with a membranous 

 testa. 



3. SoiEDA. Flowers mostly perfect, axillary, with small bractlets ; calyx 

 5-cleft or -parted, rarely crested or somewhat winged in fruit : seed horizontal or 

 vertical, the testa crustaceous. 



Suborder II. CYCLOLOBE^. Embryo annular. 

 Tribe I. Chexopodik^. Flowers usually perfect, not dimorphous, bractless, 

 the calyx persistent. Seed-integument double : albumen mostly copious. 

 Stems not jointed nor the leaves fleshy. 



* Seed horizontal. — Bete^. 



4. Aphanisma. Calyx 3-fid, not becoming costate nor winged, persistent at 

 the base of the capsular fruit ; flowers minute, monandrous, axillary. 



5. Teloxts. Calyx 5-parted, subcarinate, partially enveloping the smooth 

 fruit; flowers monandrous or pistillate, axillary and solitary, in repeatedly 

 dichotomous cymes. 



6. Ctcloloma. Calyx 5-cleft, becoming transversely winged, closely en- 

 veloping the pubescent fruit; flowers axillary and solitary, in spreading 

 panicles. 



7. KocHiA. Calyx 5-cleft, persistent over the fruit, usually transversely 

 winged ; flowers solitary or few in the axils, spicate : leaves linear-terete : 

 albumen scanty. 



8. Chenopodium. Calyx 5- or 2-3-cleft or -parted, at length subcarinate 

 or subcristately costate, enclosing the fruit; flowers clustered in panicled 

 spikes. (Seeds often vertical in § Botryois.) 



* * Seeds mostly vertical. — Blite^. 



9. RouBiEVA. Calyx 8-5-toothed, becoming saccate with a contracted 

 apex, nerved and reticulated ; flowers solitary or few in the axils : leaves 

 pinnatifld. 



10. Blitum:. Flowers perfect or pistillate ; calyx 3-5-cleft, not appen- 

 daged, often fleshy, partially enclosing the fruit : stamens 1-5. 



11. MoxoLEPis. Flowers polygamous ; calyx of a single bractlike sepal, 

 not appendaged : stamen 1 : fruit naked. 



Tribe II. Atriplice^ (including Eurotiece). Flowers monoecious or dioe- 

 cious, dimorphous ; staminate flowers with a calyx, bractless ; pistillate 

 flowers very rarely with a calj-x, usually enclosed in two more or less 

 united bracts. Seed vertical, with copious albumen. Stems not jointed, 

 nor leaves fleshy. 

 * Bracts compressed, free or more or less united : testa double. 



12. Atriplex. Fruiting bracts with the margins often dilated and the sides 

 often appendaged : radicle inferior to superior. 



* * Bracts obcompressed, united, not appendaged : testa simple : radicle 

 inferior. 



13. EuROTiA. Fruit-envelope somewhat obcompressed, conical, not winged, 

 very densely hairy-tufted, 2-beaked. 



