540 SCROPHULARIACEiE melampykum 



in diameter : capsule orbicular or broader, nearly as broad as the calyx, 

 very flat, not oblique. In fields and waste places, Oregon to Alaska and 

 across the Continent: Europe and Asia. 



24 MELAMPYRUM L. Sp, 606. 



Annual branching herbs with opposite leaves and small flowers 

 solitary in the upper axils, or in terminal spikes. Calyx 4-tooth- 

 edj the 2 upper teeth somewhat longest. Corolla bilabiate, the 

 tube narrow, gradually enlarged above, the upper lip compressed, 

 obtuse or emarginate, with a groove behind the margins, or these 

 recurved, or with a tooth on each side, lower lip spreading or as- 

 cending, 3-toothed, 2-grooved beneath. Stamens 4, ascending 

 under the galea. Anther-cells distinct, parallel, obtuse or mu- 

 cronulate at base. Capsule flat, oblique, loculicidally dehiscent, 

 2-4-seeded. Seeds smooth, strophiolate. 



M. llneare Lam. Encycl. iv, 22. Pubescent : stem slender, obscurely 

 4-sided above, at length widely branched, 6-18 inches high : leaves lanceo- 

 late or linear-lanceolate, short-petioled, acuminate or acute at the apex, 

 narrowed, obtuse or the upper truncate at base, 1-2)4 inches long, the 

 lower all entire, the upper floral ones ovate or lanceolate with 2-6 bristle- 

 pointed teeth near the base : flowers short-peduncled, 4-6 lines long : calyx 

 about one-third the length of the corolla, its subulate teeth longer than its 

 tube: corolla white or whitish, puberulent, the lower lip yellow: capsule 

 4-5 lines long, about 2 lines broad, twice as long as the calyx. In dry 

 woods, Idaho to Brit. Columbia and east to the Atlantic. 



Order LXIX. OROBANCHACE^ Lindl. Nat. Syst. ed 2, 287. 



Erect, simple or branched, brown yellowish purplish or 

 nearly white, root-parasitic herbs with the leaves reduced to al- 

 ternate appressed scales and perfect irregular flowers in ter- 

 minal bracted spikes, or sometimes solitary or fascicled and 

 peduncled in the axils of the scales. Calyx inferior, gamosep- 

 alous, 4-5-toQthed or 4-5-cleft, or split nearly or quite to the 

 base on one or both sides. Corolla gamopetalous. more or less 

 oblique, the tube cylindric, or expanded above, the limb bi- 

 labiate and 5-lobed. Stamens 4, didynamous, inserted on the 

 tube of the corolla and alternate with its lobes, a fifth rudi- 

 mentary one sometimes present. Anthers two--celled, the cells 

 parallel and equal. Ovary one-celled, with apparently four 

 parietal placentae and numerous^ anatropous, ovules. Style 

 slender, with two-lobed or four-lobed discoid stigma. Capsule 

 one-celled, two-valved. Seeds nuinerous, reticulated, wrinkled 

 or striate. Cotyledons scarcely differentiated. 



* Anther-cells deeply separated from below, mucronate or aristu- 

 late at base. 



1 Orobanche Flowers spicate and sessile or subsessile. 



2 Thalesla Flowers pedunculate, without bracts on the peduncle or calyx. 



* * Anther-cells parallel and muticose at base. 



3 Boschniakia Flowers sessile in a dense simple scaly-bracted spike. 



