182 



SCROPHULARIACEAE. 



Bracts, and usually the leaves, glandular. 



Neither bracts nor leaves glandular, but usually pubescent. 



Spikes elongated; bracts sharply toothed; plant 4'-io' high. 



Spike short, capitate; bracts bluntly toothed; plant i'-2' high. 



[Vol. III. 



1. E. latifolia. 



2. E. Americana. 



3. E. Oakesii. 



i. Euphrasia latifolia Pursh. Glandular 

 Eyebright. (Fig. 3325.) 



Euphrasia latifolia Pursh, Fl. Am. Sept. 430. 1814. 



Annual; stem erect, simple, or with a few erect 

 branches from near the base, pubescent with crisped 

 hairs, 2' '-"]' high. Leaves ovate to obovate, obtuse, 

 2-5-toothed on each side, the teeth sharp or blunt; 

 spike i / -4 / long, the bracts imbricated, at least 

 above, broadly oval to orbicular, cuneate at the 

 base, sharply toothed, glandular-pubescent beneath 

 or also on the margins; calyx-teeth acute; corolla 

 3 // -4 // long, lilac, or variegated; capsule oblong- 

 elliptic, ciliate on the margins, and more or less 

 pubescent or pilose, about as long as the calyx. 



Greenland to Hudson Bay and New Brunswick. 

 Also in northern Europe. Summer. 



Euphrasia Americana Wettst. 

 Eyebright. (Fig. 3326.) 



Hairy 



Euphrasia Americana Wettst. Mon. Euph. 127. 1896. 



Annual, pubescent with crisped hairs; stem often 

 at length much branched, 4 / -io / high. Leaves 

 sessile, ovate to oval, obtuse or acutish at the apex, 

 3-5-toothed on each side, 3" -6" long, ij"-4K" 

 wide, the teeth acute; bracts cuneate or obtuse at 

 the base, dentate, pubescent, not glandular, slightly 

 shorter than the flowers; calyx-teeth lanceolate, 

 acuminate; corolla 3 // -4 // long, purplish or nearly 

 white, its lobes emarginate; capsule narrow, cune- 

 ate, 2 // -3 // high, about equalling the calyx. 



In fields and on hills, Maine and New Brunswick to 

 Newfoundland, western Ontario and Michigan, perhaps 

 extending further west. Summer. 



Euphrasia officinalis L. is not known from North 

 America. 



3. Euphrasia Oakesii Wettst. Oakes' Eyebright. 



(Fig. 3327.) 



Euphrasia Oakesii Wettst. Mon. Euph. 142. 1896. 



Stem erect or ascending, very slender or filiform, simple, 

 i / -2 / high, somewhat pubescent. Stem leaves 2 or 3 pairs. 

 Bracts and leaves orbicular or broadly oval, narrowed or nearly 

 truncate at the base, 2 // -3 // long, obtuse, pubescent, not glan- 

 dular, with 2-5 blunt teeth on each side; spike short, capitate, 

 only 3 // -5 // long, the bracts densely imbricated; calyx-teeth 

 triangular-lanceolate, short; corolla l%"-2" long, purplish; 

 capsule oblong-elliptic, ciliate, longer than the calyx. 



White Mountains of New Hampshire. 



