860 Orobanchaceae Martynia 



Doubtless they should all be referred to the preceding species or to cul- 

 tivated trees of this species. 



Ohio Valley from the mouth of Deer Creek in Perry County, lnd., and the 

 Mississippi Valley to se. Mo. and ne. Ark. 



260. MARTYNIACEAE Link. Unicorn Plant Family 



7784. MARTYNIA L. Unicorn Plant 



[Van Eseltine. A preliminary study of the unicorn plants (Marty mi- 

 aceae). New York State Agric. Exp. Sta. Tech. Bull. 149: 1-41. 15 fig. 

 1929.] 



1. Martynia louisianica Mill. (Martynia louisiana of Gray, Man., ed. 

 7 and Britton and Brown, Illus. Flora, ed. 2.) This plant has been re- 

 ported from five of the southern counties. It is probably native in the 

 Ohio Valley and the Lower Wabash Valley. Clapp records it in his list in 

 1834. A specimen in the herbarium of Indiana University was collected 

 by Young in Jefferson County in 1877. Authors report it as being found 

 in sandy habitats, especially along the Ohio and Wabash Rivers. It has 

 been cultivated and one finds it as an occasional escape. I have found it 

 three times in Wells County but in each instance it was introduced by 

 some means or other. Once it was introduced with some strawberry plants. 



Del. to Nebr., southw. to Fla. and Mex. 



261. OROBANCHACEAE Lindl. Broomrape Family 



Flowers all perfect and complete. 



Plants glabrous; flowers in a thick, scaly spike; calyx deeply cleft in front; stamens 



exserted 7790. Conopholis, p. 860. 



Plants glandular-pubescent; calyx 5-cleft; stamens included 



7791. Orobanche, p. 860. 



Flowers of two sorts, the lower cleistogamous and fertile, the upper complete but 

 usually sterile 7792. Epifagus, p. 862. 



7790. CONOPHOLIS Wallr. 



1. Conopholis americana (L. f.) Wallr. Cancer-root. Map 1878. In- 

 frequent to frequent or local in all parts of the state. It is inconspicuous, 

 and for this reason it often may be overlooked, and, no doubt, it is more 

 frequent than the reports indicate. In Indiana it is parasitic on species 

 of oak, probably most commonly on the white oak. It is generally found 

 in woods with a deep cover of leaves, in such places as ravines and on 

 protected slopes. 



S. Maine to Mich., southw. to Fla. and Tenn. 



7791. OROBANCHE [Tourn.] L. Broomrape 



[Achey. A Revision of the section Gymnocaulis of the genus Orobanche. 

 Bull. Torrey Bot. Club 60 : 441-451. 1933.] 



Flowers racemose or the upper sessile and the lower on pedicels up to 1 cm long; 

 each flower with 1 or 2 long bracts below the calyx 1. O. ludoviciana. 



