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. 



9i. 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 ^-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, digitale, 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. 



32. BUCHNERA L. 



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

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

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

 tant. Calyx tubular, or oblong, 5-lO-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. 



Erect branched herbs, mostly with opposite leaves, at least the lower l-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. Afzeliamacrophflla(Nutt.)Kuntze. MULLEN FOXGLOVE. (I. 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- 



