1921] NATURAL SCIENCES OF PHILADELPHIA. 527 



Arkansas. "N. W. Ark.," Harvey 11 (H). 



Texas. Tarrant: Benbrook, Reverchon 3937 (M, Y). 



2. Otophylla densiflora (Benth.) Small. 



Gerardia densiflora Benth., in Compan. Bot. Mag. 1:206. 1837. "Texas. 

 Drummond." Isotype, Drummond 218, seen in Herb. Columbia Uni- 

 versity. 



Otophylla densiflora (Benth.) Small, Fl. S. E. Un. St. 1075, 1338. 1903. 



Dry sterile or stony prairies and bluffs, especially calcareous, 

 central Oklahoma south to the hills of central Texas (eastern Ed^ 

 wards Plateau). Ranges northward to central Kansas. Flower- 

 ing in August and early September. 



Oklahoma. Alfalfa: Cherokee [Outlet], Carleton 470 (I, U). 



Cleveland: ■ , P. J. White (R). Logan: , Carleton 728 



(O, R). Payne: , Olive 142 (Y). 



Texas. Bexar: Comanche Spring, Lindheimer 112 (A, C, H, M, 



P, U, Y). Blanco: Blanco, (M). Comal: New Braunfels, 



Lindheimer 379 (A, C, H, M, P, U, Y). Dallas: Dallas, Reverchon 

 1198 (C, M, P, U). Hood: Granbury, E. J. Palmer 6556 (M). 



27. BUCHNERA Linne. 

 Buchnera L., Sp. PI. 630. 1753. 

 Type species, B. americana L. 



Leaves 3-9 cm. long, lanceolate to ovate-lanceolate, relatively 

 coarsely dentate. Corolla-lobes 6-9 mm. long, the tube 2-23^ 

 times the length of the calyx. Capsule 8-9 mm. long, oblong. 

 Stem hirsute-pubescent. 1. B. americana. 



Leaves 2-7 cm. long, prevailingly lanceolate-elliptic, mostly obtuse, 

 entire or the lower slightly dentate. Corolla-lobes usually 

 4-6 mm. long, the tube mostly 1-13^ times the length of the calyx. 

 Capsule 5-6.0 mm. long, ovate. Stem less pubescent or even 

 glabrate. 2. B. elongata ohtusa. 



1. Buchnera americana L. 



Buchnera americana L. I.e. 630. 1753. "Habitat in Virginia, Canada.'' 

 Based upon Gron., Fl. Virg. 74. 1743, typified by Clayton 142 from 

 Virginia. Description sufficiently distinctive. 



Corolla purplish-blue throughout. Flowering from June to Sept- 

 ember,^ and soon ripening fruit. 



Sandy or loam soil, prairies and barren knolls or open woodland 

 of western Arkansas and eastern and central Oklahoma; southward 

 into the Coastal Plain of Louisiana and eastern Texas (where leaves 

 are smaller and more entire, and the plant probably intergrades 

 with B. elongata ohtusa Pennell). Ranges from Pennsylvania to 

 southern Ontario and Illinois, south to Florida and Texas. 



