212 SCROPHULARIACEAE 



Leaves glabrous; stem pubescent only above. 1. M. Langsdorfii. 



Leaves and stem pubescent tliroughout. 2. M. puberulus. 



Annuals, slender or low; corolla 2 cm. or less long. 



Corolla 1.5-2 cm. long, at least t\vlce as long as the caly.x. 



Stem long, usually slender; upper calyx-lobe about tA\ice as long as the 



rest; caly.K red-spotted. 3. M. nasulus. 



Stem less than 1 dm. liigh; upper calyx-lobe only slightly longer than the 

 rest; caly.x not spotted. 4. M. thermalis. 



Corolla 5-10 mm. long, about half longer than the calyx. 



Plant perfectly glabrous. 5. M. Hallii. 



Inflorescence and calyx ^-illous-puberulent. 6. M. microphyllus. 



Calyx-teeth obtuse; stem decumbent or floating, rooting at the nodes. 



7. M. Geyeri. 

 CaljTC neither obhque, nor inflated; its lobes nearly equal. 

 Perennials; flowers 1.5-4 cm. long; sepals linear-lanceolate. 

 Corolla crimson or rose. 



TaO, with erect stem, 3-10 dm. liigh, not stoloniferous. 8. M. Lewisii. 

 Stem 1-2 dm. liigh, stoloniferous. 9. A/. Eastwoodiae. 



Corolla yeUow; plant low or slender, weak. 



Stem" leafy throughout. 10. M. moschatus. 



Stem leafy only at the base. 15. M. primiiloides. 



Annuals; flowers 0.5-2 cm. long; sepals ovate, triangulai", or broadly lanceolate. 

 Leav&s petioled; blades cordate to ovate-lanceolate. 



Leaf-blades cordate or broadly ovate, indistinctly 5-ribbed. 



Corolla 1.5-2 cm. long. 11. M. peduncularis. 



CoroUa 1 cm. or less long. 



Leaves not very tliin, dark green, decidedly pubescent; stem often 



pm-ple and villous. 12. M. floribundus. 



Leaves ^•ery tliin, membranous, light green, glabrous or nearly so; stem 

 very delicate, wliite. 13. .A/, membranaceus. 



Leaf-blades ovate-lanceolate, tapering at the base, distinctly 3-ribbed. 



r4. M. breviflonis. 

 Leaves sessUe, oval, oblong, lanceolate or Unear. 

 Corolla yellow: lower hp lobed. 



Leaves basal or nearly so ; peduncle soUtary, scape-like, many times longer 



than the leaves. 15. A/, primuloidcs. 



Leaves scattered; peduncles axillary, scarcely exceeding the leaves. 



Plant "villous, 1—4 dm. liigh; lower lip of the corolla with 2 brown spots. 



16. 3/. pilosus. 

 Plant 1 dm. high or less, glabrous or glandiflar-puberulent ; corolla 



spotless. 

 Leaves thick, indistinctlv veined; corolla 4-6 mm. long. 



17. M. Suksdorfii. 

 Leaves thin, more or less distinctly 3-ribbed; corolla about 8 mm. 



long. 18. M. gratioloides. 

 Corolla rose-colored; lower lip entire. 



Plant glandular-puberulent. 19. M. ntbellus. 



Plant glandular-villous. 20. A/. Breweri. 



11. EUNANUS Benth. 



Calyx hardly at all oblique; teeth ahnost equal in length; stem glandular-pubescent. 

 Calyx-lobes lanceolate-subulate; upper stem-leaves somewhat acmninate; corolla 

 more than 2 cm. long. 1. E. Bigclovii. 



Calyx-lobes oblong-lanceolate, merely acute; leaves obtuse or acute: corolla 1.5-2 

 cm. long. 2. E. Tolmiei. 



Calvx decidedly obUque; upper tooth twice as long as the lower; plant glandular-puberu- 

 lent. 3. E. Parryi. 



12. MONNIERA (B. Juss.) P. Br. Water Hyssop. l. M. rotundi folia. 



13. LIMOSELLA L. ]\Iudwort. 



Leaves petioled, with spatulate or oblanceolate blades. 1. L. aquaiica. 



Leaves hnear-flhform, or subulate. 2. L. tenuifolia. 



14. GRATIOLA L. Hedge Hyssop. 



Flowers -without bracts. 1. G. ebracteata 



Flowers subtended by a pair of bracts similar to the calyx-lobes. 2. G. virginiana. 



16. VERONICA (Tourn.) L. Speedwell, Brooklime. 



J'lowers in axillary racemes. 



Leaves all short-petioled; leaf-blades ovate, oblong or oval. 1. V^ americana. 

 Leaves of the flowering shoots at least sessile, lanceolate to hnear. 



Pedicels less than twice as long as the fruit, the latter not strongly flattened; 

 leaves broadly lanceolate. 2. V. Anagallis-aquatica . 



Pedicels several times as long as the fruit, the latter strongly flattened; leaves 

 linear-lanceolate or linear. 3. V. scutcUala. 



Flowers in terminal spikes or racemes, or sohtary in the axils of the leaves. 



Perennials; flowers in terminal siiikes or racemes; bracts reduced and unlike the 

 leaves. 



