a. Calyx 4-toothed; stamens 4.......... Cow-wheat. (Melampyrum lineare.) 
. Calyx 5-lobed or 5-parted; stamens 2............................. 
a. Flowers whitish; calyx subtended = 2 bractlets. 
Hedge Hyssop. (Gratiola virginiana.) 
b. Flowers purplish; calyx not subtended E 2 bractlets. 
False Pimpernel. (I rt attenuata. ) 
a. Plant densely hairy; leaves ovate, bluntly toothed or e 
Corn Speedwell. v с arvensis.) 
b. Plant not densely hairy; leaves oblong to linear, sometimes ovate 
a. Flowers pale blue, arranged raceme-like in the axils of the lea 
Thyme-leaved Speedwell. (Veronica ОЛТАНЫ, ) 
e 
b. Blowers Whites а: Purslane Speedwell. (Veronica ollie 
a. ГАНЯ ovate, entire, авди bracts debout ach 1-3 flowers; 
pc-3umlong.: i us obruo C x Self-heal. (Prunella кү ) 
b. Бае subtending the flowers not completely as іп а................. 192. 
aohlowete ТОТОП S LLL CR DUM HR ez c Ee A 193. 
Dew wets 4 ju oues НН Ыл о ое ee da En Re rt erre 194. 
а. Stamens 2, the connective elongated and hinged to the filame 
Lyre-leaved Sage. “Sai lyrata.) 
b. Stamens 4, not hinged as in а...... eard-tongu (Pent on hirsutus.) 
a. Stamens 4; flowers in panicles... Pu лоп. Фуад leporella.) 
b. Stamens 2; sies. Hb HDIEeB-Or TACE I sis e Fu ERES eat, 195. 
a. Flowers 1—1 in. long, in dense, longa spikes. 
Water Willow. (Dianihera americana.) 
5. Flowers + 1n. or less tongs: se же Ws ko e Big e На, 196 
а. Racemes terminal; leaves 2—+ in. lon 
Thyme-leaved Speedwell. (Veronica serpyllifolia.) 
b. Racemes axillary; leaves 1-4 in. long.47.... AS aar e A. 
а. Racemes densely flowered, spike-like; ier 3—10 in. long. 
Common Speedwell. (Veronica o ae ) 
b. Racemes loosely flowered; plant 2—3 ft. long 
a, Leaves linear to linear-lanceolate 
ee n n s] ee ee а ng 
arsh Speedwell. (Veronica scutellata.) 
р. Leaves broadly ovate to севе i. lle coo eroe es o s eek 
а. Stem leaves sessile...... Water Riese ig (Veronica Anagali-oquaic,) 
b. Stem leaves petioled........ an Brooklime. (Veronica american 
a. Leaves linear, thick, with an тавад odor 
ow Garlic. (Allium canadense.) 
b. Leaves not with onion Hue ОПОТ и ио e VR MEE VA e dis 
a. Plants growing submerged in water; leaves linear, 3 in. or less long. 
Ditch Moss. (Philotria canadensis.) 
b. Plants not growing submerged in water 
о VUE D Wa e PE E. 202. 
а. Perianth parts з or 6, not joined into a tube; stamens 3 or 6......... 203. 
b. Flowers not completely as indies eis е ж ER. S Lo UBI MEA RE. 217. 
| 6. Ovary inferior: flowers usually Мне. : eua ee ce, ok ш 204. 
Kc Creme SOP ya ee ia a ее eae: ER TS 207. 
& Flowers 2 im ot beh broad. iio уугу eo de E EILEEN «a 205 
b. Flowers 1 in. or more broad 
