26 ANALYTICAL KEY 



base within. LITHOSPERMTJM CANESCENS (p. m). 



m. Ovary not four-lobed. 

 n. Ovary i -celled. 

 o. Leaves entire; style single. 



STAR FLOWER, TRIENTALIS AMERICANA (p. 105). 

 o, Leaves cut-toothed or lobed; style two-cleft (Water-leaf). 

 p. Calyx with a reflexed lobe at each sinus; plant hairy. 



HYDROPHYLLTIM APPEND I CTJLATTJM (p. 109). 

 p. Calyx without a reflexed lobe at the sinus; plant smoothish. 

 q.. Leaves pinnately divided; peduncles longer than the upper 

 petioles. HYDROPHYLLTTM VIRGINIANTJM (p. 109). 



Q. Leaves palmately lobed; peduncles shorter than the petioles. 

 HYDROPHYLLUM CANADENSE (p. 109). 

 n, Ovary 2-celled. 

 o. Low white-flowered annual of fields and waysides. 



PURSLANE SPEEDWELL, VERONICA PEREGRINA (p. 114). 

 o. Tall woodland perennial with blue flowers. 



NIGHTSHADE, SOLANUM DULCAMARA (p. 112). 

 h. Corolla more or less irregular (sygomorphic), its divisions dissimilar 



in size or shape. 



1. Plants without green leaves (Orobanchaceae). 

 j. Flowers numerous in a thick spike; stamens exserted. 



CANCER-ROOT, CONOPHOLIS AMERICANA (p. 115). 

 j. Flowers solitary; stamens included. 



BROOM-RAPE. OROBANCHE UNIFLORA (p. 115). 

 i. Plants with green leaves. 

 j. Leaves compound (p. 27). 

 k. Leaves without stipules. 

 1. Sepals two; corolla white, heart-shaped or spurred; stamens six 



(Dicentra). 



m. Underground stem a granulate bulb; corolla with two divergent 

 spurs. DUTCHMAN'S BREECHES, DICENTRA CUCULLARIA (p. 69). 

 m. Underground stem with scattered grain-like tubers; corolla heart- 

 shaped. SQUIRREL CORN, DICENTRA CANADENSIS (p. 70). 

 1. Sepals united, teeth inevident; corolla bilabiate; stamens four. 

 LOUSEWORT, PEDICTJLARIS CANADENSIS (p. 114). 

 k. Leaves with stipules; calyx and corolla each with five parts; 



stamens ten (Leguminosae)s 

 1. Leaves 7-11 foliolate; flowers purplish-blue. 



COMMON LUPINE, LUPINUS PERENNIS (p. 82). 

 1. -Leaves 711 foliolate; flowers purplish-blue. 

 m. Flowers in heads (.Clover). 

 n. Flowers sessile, red to rose-colored. 



RED CLOVER, TRIFOLIUM PRATENSE (p. 83). 

 n. Flowers pedicelled, pedicels reflexed in age. 

 O. Plants creeping, the stems rooting freely; flowers white. 



WHITE CLOVER, TRIFOLIUM REPENS (p. 83). 

 O. Stems ascending, not rooting; flowers pink. 



ALSIKE CLOVER, TRIFOLIUM HYBRIDUM (p. 83). 

 m. Flowers in racemes (Sweet clover) (p. 27). 

 n. Flowers yellow. 



YELLOW SWEET CLOVER. MELILOTUS OFFICINALIS (p. 83). 

 n. Flowers white. 



