SCROPHULARIACEAE. 835 



the terminal one first developing; pedicels and bractlets about'as long as the calyx; 

 calyx -segments ovate-lanceolate, acute; corolla tubular, white or bluish, 4 mm. 

 long; capsule 2-3 mm. long, 2-3 times as long as the calyx. In meadows, moist 

 woods and thickets, N. S. to Br. Col., Ala., Mo. and Kans. June-Sept. 



21. DIGITALIS L. 



Tall herbs, with alternate leaves, and large purple, yellowish or white flowers, 

 in long terminal commonly i-sided racemes. Calyx 5-parted, the segments imbri- 

 cated. Corolla declined, somewhat irregular, the tube contracted above the ovary, 

 then rather abruptly expanded, longer than the 4~5-lobed slightly 2-lipped limb; 

 upper lip emarginate or 2-cleft; lower lip 3-lobed, the middle lobe largest, the 

 lateral ones exterior in the bud. Stamens 4, didynamous, ascending, mostly 

 included; anthers approximate in pairs. Style slender; stigma 2-lobed. Capsule 

 ovoid, septicidally dehiscent. Seeds numerous, rugose. [Latin, digitate, the 

 finger of a glove, which the flowers resemble.] About 20 species, of Europe and 

 Asia. 



i. Digitalis purpurea L. PURPLE FOXGLOVE. (I. F. f. 3300.) Usually 

 biennial, pubescent; stem stout, erect, 6-15 dm. high. Basal and lower leaves 

 ovate or ovate-lanceolate, 1.5-2.5 dm. long, slender petioled, acute, narrowed at 

 the base, dentate; upper leaves similar, smaller, sessile; racemes 3 dm. long or 

 more, dense, I -sided; flowers purple, 3-5 cm. long, drooping; upper calyx-seg- 

 ment narrower than the four other foliaceous ones; corolla spotted within. "Cape 

 Breton Island, apparently nat. from Europe (according to Macoun) ; sparingly 

 escaped from cultivation. Also in the Northwest. June-Aug. 



22. BUCHNERA L. 



Erect, perennial or biennial, strict hispid or scabrous herbs, blackening in 

 drying, the lower leaves opposite, the upper sometimes alternate. Flowers rather 

 ^rge, white, blue, or purple, in terminal bracted spikes, the lower commonly dis- 

 tant. Calyx tubular, or oblong, 5-iO-nerved, 5-toothed. Corolla salverform, its 

 tube cylindric, somewhat curved, its limb nearly equally 5 -cleft, spreading, the 

 lateral lobes exterior in the bud. Stamens 4, didynamous; anther-sacs confluent 

 into I. Style slender, thickened or club-shaped above; stigma small, entire or 

 emarginate. Capsule loculicidally dehiscent. Seeds numerous, reticulated. 

 [Named for J. G. Buchner.] About 30 species, of warm and temperate regions. 

 Besides the following, another occurs in the southern U. S. 



i. Buchnera Americana L. BLUE-HEARTS. (I. F. f. 3301.) Hispid and 

 rough ; stem slender, 3-8 dm. high. Leaves usually all opposite, prominently 

 veined, the lowest obovate or oblong, obtuse, narrowed into very short petioles, 

 the middle ones oblong or oblong -lanceolate, dentate, sessile, the upper lanceolate 

 or linear-lanceolate, entire or nearly so ; spike peduncled, 1.5-2.5 dm. long in 

 fruit, the flowers mostly opposite, nearly 2.5 cm. long; bractlets shorter than the 

 calyx ; calyx strigose; corolla purple, its lobes obovate, obtuse; capsule ovoid, 

 slightly oblique, 8 mm. high, a little longer than the calyx. In sandy or gravelly 

 soil, N. J. to western N. Y., Minn., Va., La., Kans. and Ark. June-Sept. 



23. AFZELIA J. G. Gmel. [SEYMERIA Pursh.] 



Erect branched herbs, mostly with opposite leaves, at least the lower 1-2 pin- 

 nately parted or dissected, and yellow flowers solitary in the axils, or in terminal 

 bracted spikes or racemes. Calyx campanulate, 5-cleft or 5-parted. Corolla 

 slightly irregular, campanulate or rotate, the tube short, the limb 5-lobed, the 

 lower lobe exterior in the bud. Stamens 4, slightly unequal; filaments short, villous, 

 at least near the base; anthers 2-celled, the sacs parallel, distinct. Capsule acute 

 and more or less compressed at the summit. Seeds numerous, reticulated. [Named 

 for Adam Afzelius, 1750-1812, botanical professor at Upsala.] About 10 species, 

 of N. Am., Mex. and Madagascar. Besides the following, 4 others inhabit the 

 southern U. S. 



i. Afzeliamacrophlla(Nutt.)Kuntze. MULLEN FOXGLOVE. (L F. f. 3302.) 

 Annual (?), puberulent or glabrate; stem sparingly branched, or simple, 12-18 dm. 

 high. Lower leaves long-petioled, pinnately parted, 1.5-4 dm. long, their seg- 



