SOLANACEAE (POTATO FAMILY) 



2 a Leaves lanceolate or oblong, incised 



CUT-LEAVED WATER HOARHOUND. (L. americanus.) 

 b Leaves usually ovate, coarsely toothed or sometimes 



incised 3 



3 a Corolla twice as long as calyx; leaves sharply toothed 



STALKED WATER HOARHOUND. (L. rebellus.) 

 b Corolla only slightly longer than the calyx; leaves 

 bluntly toothed 



. EUROPEAN WATER HOARHOUND. (L. europaeus.) 



28 M6NTHA. 



1 a Flowers all in axillary whorls, not in spikes 2 



b At least some flowers in terminal, interrupted spikes. . 3 



2 a Leaves 1-2 in. long, ovate to obovate 



DOWNY WHORLED MINT. (M. gentllis.) 

 b Leaves 1-4 in. long, oblong to ovate-oblong 



AMERICAN MINT. (M. canadensls.) 



3 a Leaves lanceolate or sometimes ovate 4 



b Leaves rounded or broadly ovate 6 



4 a Plant hairy HAIRY HORSE MINT. (M. longifblia.) 



b Plants not hairy 5 



5 a Spike much interrupted, the flowers in numerous, sep- 



arated whorls SPEARMINT. (M. spicata.) 



b Spike interrupted only at the base, whorls dense and 



close together PEPPERMINT. (M. pipenta.) 



6 a Leaves mostly incised, crisp, wavy; spikes %-9i in. in 



diameter, about i in. long 



CRISP-LEAVED MINT. (M. crispa.) 

 b Leaves coarsely toothed ; spikes 1-4 in. long 7 



7 a Plant white-woolly; leaves rather smooth, sharply 



toothed WOOLLY MINT. (M. alopecuroides.) 



b Plant merely hairy; leaves somewhat uneven surfaced, 



bluntly toothed. .ROUND- LEAVED MINT. (M. rotundifblia.) 



29 COLLINS6NIA HORSE BALM. (C. canadensis.) 



30 C6LEUS COLEUS. (C. blumei*) 



8 SOLANACEAE. Potato Family. 



1 LYCOPERSICON COMMON TOMATO. (L. lycopersicon.*) 



2 CAPSICUM RED PEPPER. (C. dnnuum*) 



3 SOLANUM. 



1 a Plants with prickly stems 2 



b Plants not with prickly stems 3 



2 a Cultivated plant; leaves with wavy margins 



EGG PLANT. (S. melongena*) 

 b Wild plant; leaves lobed or pinnatifid 



HORSE NETTLE. (S. carolinense.) 



3 a Plant cultivated in pots for the showy fruit 



JERUSALEM CHERRY. (S. pseudo-capsicum.*) 

 b Plants not cultivated in pots 4 



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