GENUS 33. 



i. Schwalbea americana L. 

 Fig. 3839- 



FIGWORT FAMILY. 



Chaff-seed. 



Schwalbea americana L. Sp. PI. 606. 1753- 



Stem slender, strict, i-2 high. Leaves ob- 

 long or ovate-oblong, entire, acute at both ends, 

 i'-ii' long, 2"-8" wide, the upper gradually 

 smaller and passing into the bracts of the rather 

 loose spike; flowers very nearly sessile, l'-ii' 

 long, longer than the bracts; bractlets at the base 

 of the calyx linear, shorter than its tube; corolla- 

 tube slightly exceeding the lower lobes of the 

 calyx, these connate to near their apices; capsule 

 enclosed by the calyx. 



In wet sandy soil, eastern Massachusetts to Flor- 

 ida and Louisiana, near the coast. May-July. 



34. EUPHRASIA [Tourn.] L. Sp. PI. 604. 1753. 



Annual or perennial low mostly branched herbs, parasitic on other plants, with opposite 

 dentate or incised leaves, and small blue purplish yellow or white often variegated flowers in 

 terminal leafy-bracted spikes. Calyx not bracteolate at the base, campanulate or tubular, 

 4-cleft (rarely S-cleft with one of the lobes much smaller than the others). Corolla very 

 irregular, 2-lipped, the upper lip erect, scarcely concave, 2-lobed, its margins recurved; lower 

 lip larger, 3-lobed, spreading, its lobes either emarginate or obtuse. Stamens 4, didynamous, 

 ascending under the upper lip of the corolla; anther-sacs equal and parallel, mucronate at the 

 base. Capsule oblong, loculicidally dehiscent, many-seeded. Seeds oblong, longitudinally 

 ribbed. [Greek, delight.] 



About no species, natives of temperate and cold regions of both the northern and southern 

 hemispheres. Besides the following, another occurs in northwestern North America. Type species : 

 Euphrasia officinalis L. 



Flowers 2 l / 2 "-4" long. 



Leaves markedly pubescent on both sides. i. E. arctica. 



Leaves glabrate or sparingly pubescent. 2. E. americana. 

 Flowers i^"-2" long. 



Stem 3'-2o' long ; flowers racemose-spicate. 3. E. Randii. 



Stem i '-2' high; flowers subcapitate. 4. E. Oakesii. 



i. Euphrasia arctica Lange. Glandular Eye- 

 bright. Fig. 3840. 



Euphrasia arctica Lange, Bot. Tidskr. 4: 47. 1870. 



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

 Not Willd. 



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

 branches from near the base, pubescent with crisped 

 hairs, 2' -7' high. Leaves ovate to obovate, obtuse, 

 pubescent on both sides, 2-5-toothed on each margin, 

 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, 

 the lobes of its lower lip nearly parallel ; capsule 

 oblong-elliptic, ciliate on the margins, and more or 

 less pubescent or pilose, about as long as the calyx. 



Bluffs and slopes, Greenland to Hudson Bay, New 

 Brunswick, Maine and Minnesota. Has been erro- 

 neously referred to E. hirtella Jordan. Summer. 



