172 



SCROPHULARIACEAE. 



[Vol. III. 



22. BUCHNERA L. Sp. PI. 630. 1753. 

 Erect, perennial or biennial, simple or branched, strict hispid or scabrous herbs, black- 

 ening in drying, the lower leaves opposite, the upper sometimes alternato. Flowers rather 

 large, white, blue, or purple, in dense terminal bracted spikes, the lower commonly distant. 

 Calyx tubular, or oblong, 5-10-nerved, 5-toothed. Corolla salverform, its tube cylindric, 

 somewhat curved, its limb deeply and nearly equally 5-cleft, spreading, the lateral lobes ex- 

 terior iu the bud. Stamens 4, didynamous; anther-sacs confluent into i. Style slender, 

 thickened or club-shaped above; stigma small, entire or cmarginate. Capsule oblong or 

 ovoid, loculicidally dehiscent. Seeds numerous, reticulated. [Named for J. G. Buchncr.] 



About 30 sptcies, natives of warm and temperate regions. Besides the following, another oc- 

 curs in the southern United St.ilcs. 



I. Buchnera Americana L. Blue-hearts. 

 (Fig. 3301.) 



Buchnera Americana I<. Sp. PI. 6jo. 1753. 



Plispid and rough; stem slender, stiff, i°-2j^° high. 

 Leaves usually all opposite, prominently veined, the 

 lowest obovate or oblong, obtuse, narrowed into very 

 short petioles, the middle ones oblong or oblong-lan- 

 ceolate, dentate, obtuse or acute at the apex, narrowed 

 at the base, sessile, the upper lanceolate or linear-lan- 

 ceolate, entire or nearly so; spike peduncled, 6'-io" 

 long in fruit, the flowers mostly opposite, nearly \' 

 long; bractlets shorter than the calyx; calyx strigose; 

 corolla purple, its lobes obovate, obtuse, 3"-4" broad; 

 capsule ovoid, slightlj' oblique, 4" high, a little longer 

 than the calyx. 



In sandy or gravelly soil. New Jersey to western New 

 York and Minnesota, south to Virginia, Louisiana and Ar- 

 kansas. June-Sept. 



23- 



1796. 



AFZELIA J. G. Gmel. Sy.st. Nat. 2: 927. 

 [Sey.meria Pursh, Fl. Am. Sept. 736. 1814.] 



Erect stout branched annual or perennial herbs, mostly with opposite leaves, at least the 

 lower i-2-piuDately parted or dissected, and yellow flowers solitary in the axils, or in ter- 

 minal bracted spikes or racemes. Calyx campauulate, 5-cleft or 5-parted. Corolla slightly 

 irregular, campauulate or rotate, the lube short, broad, the limb 5-lobcd, the lower lobe ex- 

 terior in the bud. Stamens 4, slightly unequal, scarcely or not at all exserted; filaments 

 short, villous, at least near the base; anthers 2-celled, the sacs parallel, distiuct. Style short 

 or slender. Capsule globose or ovoid, acute aud more or less compressed at the summit. 

 Seeds numerous, reticulated. [Named for Adam Afzelius, 1750-1812, botanical professor at 

 Upsala.] 



About in species, natives of North America, Mexico and Madagascar. Besides the following, 

 4 others inhabit the southern fnited States. 



I. Afzelia macrophylla (Nutt.) Kuntze. Mullen Foxglove. (Fig. 3302.) 



Seynieria macrophylla Nutt. Cen. 2: 49. 181S. 

 Gerardia viacrophylla Benth. Corap. Bot. Mag. 1: 



205. 1S35. 

 A. macrophylla Kuntze, Rev. Gen. PI. 457. 1S91. 



Annual (?), puberulent or glabrate; stem 

 sparingly branched, or simple, 4°-6° high. 

 Lower leaves long-petioled, pinnatclj' parted, 

 6'-i5' long, their segments lanceolate, coarsely 

 dentate, irregularly incised, or pinuatifid; upper 

 leaves short-petioled or sessile, oblong or lanceo- 

 late, I'-j' long, entire, obtuse or acutish at the 

 apex, narrowed at the base, each with a sessile 

 flower in its axil; flowers 5"-?" long; calyx- 

 lobes lanceolate or ovate, acute, about as long as 

 the tube; corolla light yellow, 2-3 times as long 

 as the calyx, woolly in the throat; style short, 

 club-shaped; capsule globose-ovoid, 3"-4" high, 

 twice as long as the calyx. 



In moist thickets and along streams, Ohio to 

 Iowa and Nebraska, south to Kentucky and Te.\as. 

 Aug.-Oct. 



