540 SCROPHULARIACE.E MELAMPYRUM 



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- 

 ed, 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. lineare 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, 1-23^ 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.E 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- toothed 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, anatfopous, ovules. Style 

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

 one-celled, two-valved. Seeds numerous, 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 Thalesia Flowers pedunculate, without bracts on the peduncle or calyx. 



* * Anther-cells parallel and muticose at base. 

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



