KEY FOR JUNE TO NOVEMBER 



574 a Stems with a membranous sheath at the base of each 



leaf 575 



b Stems not with a membranous sheath at the base of 



each leaf 577 



575 a Cultivated grain, sometimes escaped, with rather fleshy 



stem and triangular-heart-shaped leaves. Fagopyrum. p 14.6 

 b Plants not completely as in a 576 



576 a Leaves linear; stalks of flowers solitary, not clustered 



Polygonella. 

 b Leaves variously shaped ; stalks of flowers usually 



clustered Polygonum. p 146 



577 a Climbing or trailing vines with rounded, angled leaves 



Menispermum. p 154 

 b Plants not completely as in a 578 



578 a Perianth not differentiated into green calyx and colored 



corolla 579 



b Perianth differentiated into green calyx and colored 



corolla 580 



579 a Plant 6 in. or less high with 2 or 3 leaves. .Unifolium. p 135 

 b Plant 2 ft. or more high Phytolacca. p 149 



580 a Petals 3 ; sepals 5, the 2 outer smaller and narrower 



Lechea. p 186 

 b Petals 4 or more 581 



581 a Petals 4; sepals 4; stamens 6, 2 of which are shorter.. 582 

 b Petals 5 or more 589 



582 a Plant fleshy, growing on sea-beaches; pods or ovaries 



usually 2-jointed Cakile. p 158 



b Plants not fleshy; pods or ovaries not jointed 583 



583 a Flowers %-i in. broad, purple or white 584 



b Flowers % in. or less broad, white 585 



584 a Leaves 3-6 in. long, broadly ovate and heart-shaped 



Lunar ia. p 160 

 b Leaves 1-3 in. long, ovate to lanceolate Hesperis. P 159 



585 a Plant very hairy throughout, hoary; pods or ovaries 



hairy Berteroa. p 159 



b Plants not completely as in a 586 



586 a Flowers fragrant; plants procumbent or ascending 



Koniga. p 159 

 b Flowers not fragrant; plants erect 587 



587 a Basal leaves 4-15 in. long, oblong; pods or ovaries cir- 



cular, flattened Roripa armoracia. p 158 



b Plants not completely as in a 588 



588 a Basal leaves usually rounded Cardamine. p 159 



b Basal leaves not rounded Arabis. p 159 



589 a Plant with a single, ovate stem-leaf below the solitary 



flower Parnassia. p 161 



b Plants not completely as in a 590 



61 



