406 CHENOPODIACE^E. (GOOSEFOOT FAMILY.) 



* Embryo coiled into a ring around copious central albumen. Leaves flat, not spiny nor fleshy. 

 "- Flowers all alike and perfect,' or merely polygamous by the want of stamens in some of them, 



clustered or panicled. . Calyx obvious. Seed-coat crustaceous. 



1. Cycloloma. Calyx 5-cleft, in fruit surrounded by a horizontal continuous membrana- 



ceous wing. Seed horizontal. 



2. Chenopodium. Calyx 3 - 5-cleft or parted, the lobes naked or merely keeled in fruit. 



Seed horizontal, rarely vertical. 



3. Blitum. Calyx of 3 - 5 sepals, mostly juicy or fleshy in fruit. Seed vertical. 



-- *- Flowers monoecious or dioecious, and of 2 distinct sorts ; the staminate with a regular 

 calyx, clustered, the clusters mostly spiked. 



4. A triplex. Fertile flowers without calyx, enclosed between a pair of appressed bracts. 



.- H- t- Flowers all perfect and alike, single in the axil of bracts, naked or 1-sepalled. 

 ft. Corispermum. Fruit oval, flattened -. pericarp adherent to the seed. Leaves linear. 



* * Embryo narrowly horseshoe-shaped or conduplicate : no albumen. Stem fleshy, jointed : 



leaves reduced to opposite fleshy scales or teeth. Flowers densely spiked, perfect. 



6 Salicornia. Flowers sunk in hollows of the axis of the fleshy spike. Calyx utricle-like. 



* * * Embryo coiled into a spiral : albumen mostly none. (Leaves alternate.) 



7. Suseda. Embryo flat-spiral. Calyx wingless. Leaves succulent. 



8. Salsola. Embryo conical-spiral. Calyx in fruit horizontally winged. Leaves spinescent. 



1. CYCLOLOMA, Moquin. WINGED PIGWEED. 



Flowers perfect, bractless. Calyx 5-cleft, with the concave lobes strongly 

 keeled, enclosing the depressed fruit, at length appendaged with a broad and 

 continuous horizontal scarious wing. Stamens 5. Styles 3. Seed horizontal, 

 flat. Embryo encircling the mealy albumen. An annual and much-branched 

 coarse herb, with alternate sinuate-toothed petioled leaves, and small panicled 

 clusters of sessile flowers. (Name composed of KVK\Q>, round about, and Ao>/ia, 

 a border, from the encircling wing of the calyx in fruit. ) 



1. C. platyph^-llum, Moquin. ( Salsola platyphylla,lf/cfo:.) Illinois, 

 on sandy banks of the Mississippi, and northwestward. 



2. CHENOPODIUM, L. GOOSEFOOT. PIGWEED. 



Flowers perfect, all bractless. Calyx 5-cleft, rarely 2 - 4-cleft or parted, with 

 the lobes sometimes keeled, but not appendaged nor becoming succulent, more 

 or less enveloping the depressed fruit. Stamens mostly 5 : filaments filiform. 

 Styles 2, rarely 3. Seed horizontal (sometimes vertical in Nos. 3, 7 - 9), lenticu- 

 lar ; the coat crustaceous : embryo coiled partly or fully round the mealy albumen. 

 Weeds, usually with a white mealiness, or glandular. Flowers sessile in 

 small clusters collected in spiked panicles. (Named from XT/I/, a goose, and TTOVS, 

 foot, in allusion to the shape of the leaves.) Our species are all annuals (ex- 

 cept the last two), flowering through late summer and autumn, growing around 

 dwellings, in manured soil, cultivated grounds, and waste places. ' 



1. Smooth or mealy, never glandular nor sweet-scented: embryo a complete ring. 



1. C. POLYSPERMUM, L. Low, often spreading, green and wholly destitute of 

 mealiness throughout ; leaves all entire, oblong or ovate and on slender petioles ; 

 flowers very small, the thin lobes of the calyx very incompletely enclosing the 

 fruit ; seed obtuse-edged. In and around Boston : scarce. (Adv. from Eu.) 



