254 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Agalinis decemloba (Greene) Pennell. 



Dry woods and fields; frequent. Aug. -Sept. Del. to N. C. (Gerardia decemloba 

 Greene.) 



The type was collected near Brookland. 



19. OTOFHYLLA Benth. 



1. Otophylla aurieulata (Michx.) Small. 



Low ground north and east of Washington and near Alexandria. Sept. Eastern 

 U. S. (Gerardia aurieulata Michx.) 



20. PEDICTJLARIS L. 



Stems glabrous; stem leaves chiefly opposite, shallowly lobed; capsule about as long 

 as the calyx 1. P. lanceolata. 



Stems woolly; stem leaves alternate, deeply lobed or parted; capsule much longer 

 than the calyx 2. P. canadensis. 



1. Pedicularis lanceolata Michx. Swamp loitsewort. 

 Swamps along Hunting Creek. Sept.-Oct. Eastern X. Amer. 



2. Pedicularis canadensis L. Wood betony. 

 Woods and thickets; occasional. Apr-May. Eastern N. Amer., west to Colo. 



21. MELAMPYRUM L. 

 1. Melampyrum lineare Lam. Cow-wheat. 



Dry woods north and east of Washington. May-Aug. Eastern and northern N. 

 Amer. (M. americanum Michx.) 



138. BIGNONIACEAE. Bignonia Family. 



1. BIGNONIA L. 

 1. Bignonia radicans L. Trumpet creepeb. 



Woods and thickets: frequent along the Potomac. June-Sept. Eastern U. S. Often 

 cultivated for ornament. ( Tecoma radicans DC. ; Campsis radicans Seem.) 



Catalpa bignonioides Walt., the catalpa, is common in cultivation and is sometimes 

 found as an escape. Native of the southern U. S. In this species the flowers are 

 thickly spotted within and the lobes are crimped. C. speriosa Warder, with only 

 slightly spot led flowers and flat lobes, is also in cultivation. C. ovata Don (C. hicmp- 

 /en'Sieb. & Zucc), a Chinese species with yellow flowers, has been reported as an 

 escape. 



Martynia louisiana Mill., the unicorn plant, has been collected a few times in waste 

 ground. Native of the western U. S.; sometimes cultivated and escaping. (M. 

 proboscidea Glox.) 



139. OROBAffCHACEAE. Broom-rape Family. 



The plants of this family are wholly without green coloring. 



Stems branched, the branches numerous, ascending, straight, simple, long, and 

 slender 1. LEPTAMNIUM. 



Stems not branched. 

 Flowers 1-4, solitary on slender scapelike eialks 0-20 cm. long, these rising from the 



nearly underground stem 2. THALESIA. 



Flowers very numerous, sessile or short-si alked, in dense spikes on the erect stems. 

 Plants glabrous; stems 2-3 cm. thick, densely covered with overlapping scales; 



flowers crowded, extending to the base of the stem 3. CONOPHOLIS, 



Plants glandular-pubescent; stems about- 5 mm. thick, the scales comparatively 

 few and scattered; flowers more or lees crowded, borne on the upper half of 

 the stem 4. OROBANCHE. 



