KEY. 231 



678. Leaves opposite, or whorled 690 



Leaves alternate 6^9 



679. Sheathing stipules (ochreoe) present. 



Polygonum (esx). 

 Stipules none. Fruit an utricle 680 



680. Styles constantly 3. Perianth urn-shaped, 5-cleft, 

 or toothed. Flowers glomerate in racemes or panicles. .681 



Styles or stigmas usually 2, rarely 3. Perianth not 

 (or hardly) urn-shaped, usually 5- (i-arely 3-) lobed, remain- 

 ing dry, or hecoming juicy and red after flowering 682 



681. Perianth with a scarious, horizontal wing, after 

 flowering. Utricle depressed. Seed horizontal. Stem fur- 

 rowed. Leaves sinuate-toothed. 



Cycloloma platyphyllum, Mpq. 

 Perianth not winged after flowering. Utricle pod- 

 like, glandular-dotted. Seed vertical. Leaves once- or 

 twice-pinnatifld. Roubieva multifida, Moq. 



682. Seed vertical. Perianth 5- (or 3-) parted, becom- 

 ing juicy or berry-like, or remaining dry, after flowering. 

 Styles or stigmas 2. Embryo in a complete ring. Flowers 

 glomerate, forming axillary or terminal spikes. 



(647 and 648.) Blitum. 



Seed horizontal. Perianth 5- (or 3-) cleft or parted, 



remaining dry after flowering. Embryo spiral or coiled. 



683 



683. Embryo spiral. Flowers glomerulate (2 or 3), 

 axillary. Stigmas 2 or 3, sessile. Leaves linear, fleshy. 



Chenopodiua maritima, Moq. 



Embryo coiled. Flowers glomerate in panicled 



spikes. Styles 2. Leaves broad, often rhombic. Herbs 



often glaucous, or glandular. Chenopodium. 



684. (670.) Perianth campanulate, or top-shaped, its 

 limb apparently 8- to 10-lobed (that is, parted into 4 or 5 

 petaloid segments, altemate with as many glands). Sta- 

 mens about 12, each jointed on a pedicel, which has a little 

 bract at its base. Ovary stalked, 3-lobed. Styles 3, bifid. 



538 



Perianth 4- or 5-parted, without interposed glands. 



