GENUS 26. 



FIGWORT FAMILY. 



205 



26. BUCHNERA L. Sp. PL 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 alternate. Flowers rather 

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

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

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

 exterior in the bud. Stamens 4, didynamous, included; anther-sacs confluent into i. Style 

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

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



About 30 species, natives of warm and temperate regions. Besides the following, another 

 occurs in the southern United States. Type species: Buchner a americana L. 



i. Buchnera americana L. Blue-hearts. 

 Fig. 3810. 



Buchnera americana L. Sp. PI. 630. 1753. 



Hispid and rough; stern slender, stiff, i-2i 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 i' long; 

 bractlets shorter than the calyx; calyx strigose; corolla 

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

 slightly oblique, 4" high, a little longer than the calyx. 



In sandy or gravelly soil, New Jersey to western New 

 York, southern Ontario and Minnesota, south to Virginia, 

 Louisiana, Kansas and Arkansas. June-Sept. 



27. AFZELIA J. G. Gmel. Syst. Nat. 2: 927. 1796.^ 



[SEYMERIA Pursh, Fl. Am. Sept. 736. 1814.] 



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

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

 minal bracted spikes or racemes. Calyx campanulate; 5-cleft or 5-parted. Corolla slightly 

 irregular, campanulate or rotate, the tube short, broad, the limb 5-lobed, the lower lobe 

 exterior 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, distinct. Style short 

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

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



About 10 species, natives of North America, Mexico and Madagascar. Besides the following, 

 4 others inhabit the southern United States. Type species: Anonymos cassioides Walt. 



^9 II , , ^ M'/t i. Afzelia macrophylla (Nutt.) Kuntze. 



Mullen Foxglove. Fig. 3811. 



Seymeria macrophylla Nutt. Gen. 2: 49. 1818. 

 Gerardia macrophylla Benth. Comp. Bot. Mag. 1 : 205. 



1835- 

 A. macrophylla Kuntze, Rev. Gen. PL 457. 1891. 



Annual (?), puberulent or glabrate; stem spar- 

 ingly branched, or simple, 4-6 high. Lower 

 leaves long-petioled, pinnately parted, 6'-i5' long, 

 their segments lanceolate, coarsely dentate, irregu- 

 larly incised, or pinnatifid ; upper leaves short- 

 petioled or sessile, oblong or lanceolate, i'-3' long, 

 entire, obtuse or acutish at the apex, narrowed at 

 the base, each with a sessile flower in its axil ; 

 flowers S"-7" long; calyx-lobes lanceolate or 

 ovate, acute, about as long as the tube; corolla 

 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, Nebraska, Kentucky and Texas. Aug.-Oct. 



28. DASYSTOMA Raf. Journ. Phys. 89: 99. 1819. 



Large erect simple or branched, glandular-puberulent, pubescent or glabrous, annual or 

 perennial herbs, partly parasitic on the roots of other plants, with opposite whorled or some 

 alternate leaves, and large showy yellow flowers, in terminal mostly leafy-bracted racemes 



