OROBANCHACEAE 1093 



sessile, surpassing the two bracts ; tube split on the lower side, terminating in 3-4 teeth 

 on the upper side : corolla yellowish or pale yellow, surpassing the calyx, the upper lip 

 notched, the lobes of lower lip obtuse or notched : capsules ovoid, 1-1.5 cm. long, obliquely 

 pointed. 



In woods, Miiine to Michigan and Florida. Spring and summer. 



2. OROBANCHE L. 



Parasitic herbs, on roots of various plants, commonly with yellowish or brownish 

 pubescent foliage. Leaves scale-like. Flowers spicate, with bractlets. Calyx with a deep 

 sinus above and below, the lateral lobes often 2-cleft. Corolla irregular : tube slightly 

 curved : limb 2-lipped, the upper lip erect or incurved, the lower lip spreading. Ovary 

 1 -celled. Capsule 2-valved. Broom-rape. 



1. Orobanche minor J. E. Smith. Foliage glandular-pubescent, yellowish or yellow- 

 ish brown. Stems solitary or clustered, 1-5 dm. tall, simple : scales (leaves) ovate to 

 lanceolate, 6-20 mm. long, acute, sessile : spikes interrupted below, continuous above, 1-2 

 dm. long : bracts lapceolate, as long as the flowers or longer : calyx pubescent ; lobes 

 lanceolate-subulate : corolla glandular-pubescent especially along the l)ack, 1-1.5 cm. long ; 

 tube yellowish, the lips bluish, erose and irregularly toothed : capsules oblong, less than 1 

 cm. long. 



Parasitic on clover-roots, New Jersey to North Carolina. Naturalized from Europe. Spring and 

 summer. 



3. MYZORRHIZA Philippi. 

 Parasitic herbs, on the roots of other plants, with more or less pubescent foliage. 

 Leaves scale-like. Flowers spicate, or sometimes peduncled, subtended by bractlets. Calyx 

 nearly equally 5-lobed, the lobes narrow. Corolla purplish : tube slightly curved : limb 

 2-lipped, the lips often nearly erect. Ovary 1-celled. Capsule 2-valved. 



1. Myzorrhiza Ludovlci^na ( Nutt. ) Rydb. Foliage minutely glandular-pubescent. 

 Stems solitary or clustered, simple or usually branched, 0.5-3 dm. tall, scaly, often stout : 

 scales (leaves) ovate to ovate-lanceolate: spikes 2-15 cm. long, dense, conspicuous: c;ilyx 

 densely glandular-pubescent; lobes linear-lanceolate or nearly linear: corolla purplish, 

 1.5 cm. long: tube constricted above the ovary, the upper lip 2-lobed, the lower lip 3- 

 lobed, the lobes entire : capsules oblong-ovoid. 



In sandy soil, Northwest Territory to Illinois, Texas and California. Summer. 



4. THALESIA Eaf. 

 Parasitic herbs, with pale or pink foliage. Stems solitary or tufted, simple or branched. 

 Leaves scale-like, sometimes mainly at the base of the plant. Flowers perfect, occasionally 

 solitary, peduncled or pediceled. Calyx erect or horizontal : lobes nearly equal, acute or 

 acuminate. Corolla often more deeply colored than the rest of the foliage : tube curved : 

 limb slightly 2-lipped, the upper lip often 2-lobed, the lower lip spreading, with 3 more or 

 less unequal lobes. Stamens included. Ovary 1-celled, with 4 usually equidistant placentae. 

 Stigmas peltate to slightly 2-cleft. Ovules numerous. Capsule erect or ascending, 2- 

 valved. [Aphyllon Mitch.'] Broom-eape. 



1. Thalesia unifl6ra ( L. ) Britton. Foliage glandular-pubescent. Stems very short, 

 often branching, commonly subterranean, scaly : peduncles solitary or several together, 

 0.5-1.5 dm. tall, simple : flowers solitary, violet-scented : calyx campanulate ; lobes lanceo- 

 late, acuminate, as long as the tube or longer : corolla cream-colored or tinged with pur- 

 ple ; tube 1-1.5 cm. long; lobes oblong or obovate, ciliate, ^-^ as long as the tube: 

 capsules erect, conic-ovoid, about 1 cm. long. 



In woods, parasitic on roots, Newfoundland to British Columbia, middle Georgia, Texas and Cali- 

 fornia. Spring and sunimer. 



5. LEPTAMNIUM Eaf. 

 Parasitic caulescent herbs, with firm tissues and dark-colored foliage. Leaves scale- 

 like, few. Flowers in elongated open spikes, of 2 kinds, cleistogamous on the lower part of 

 the spike, and complete but mostly sterile above. Calyx nearly regular, 5-lobed. Corolla 

 paler than the rest of the plant : tube curved and slightly enlarged upward : lobes 4, nearly 

 equal, the slightly longer upper one concave or arching. Stamens slightly exserted. 

 Ovary 1-celled, with 4 broad placentae in pairs. Stigma between capitate and 2-lobed. 

 Ovules numerous. Capsule short, 2-valved at the apex. [Epiphegus '!^utt.] BEEcn-DKOPS. 



