836 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



and northern Mexico. Corolla copper-colored outside, yellow within, 

 the throat spotted with purple, the limb streaked with orange, the 

 upper lobes spreading. 



3. Martynia altheaefolia Benth., Bot. Voy. Sulph. 37. 1844. 



Proboscidea altheaefolia Decne., Ann. Sci. Nat. Bot. ser. 5,3: 

 324. 1865. 



Yuma, Yuma County (H. Brown in 1905). Western Texas to 

 southeastern California and northern Mexico. 



Brown's specimen corresponds with the characterization of M. 

 altheaefolia (see footnote 49, p. 835, Van Eseltine, pp. 13, 19), except 

 that the calyx lobes are rather more than one-half as long- as the tube. 

 Another collection near Yuma (Peebles et al. 4956) seems to be inter- 

 mediate between this species and M. arenaria. It is somewhat 

 doubtful that the latter is specifically distinct from M. altheaefolia. 



113. OROBANCHACEAE. Broomrape family 



Plants herbaceous, without chlorophyll, root-parasitic; stems fleshy; 

 leaves alternate, reduced to scales; corolla irregular, bilabiate, the tube 

 narrow, the lower lip 3-lobed; stamens commonly 4, in pairs; capsule 

 1 -celled, 2-valved; seeds many, very small. 



Key to the genera 



1. Calj'x very irregular, spathelike, deeply cleft on the lower side, several-toothed 

 on the upper side; upper lip of the corolla deeply concave. 



1. Conopholts. 



1. Calyx nearly regular, the lobes or teeth almost equal; upper lip of the corolla 

 not deeply concave 2. Oeobanche. 



1. CONOPHOLIS. Squawroot 



Plant yellowish; stems clustered, covered with imbricate scales; 

 inflorescence spikelike, elongate, not branched, dense, conspicuously 

 bracted, the flowers in several rows; corolla strongly bilabiate, the 

 upper lip arched, emarginate. 



1. Conopholis mexicana A. Gray, Amer. Acad. Arts and Sci. Proc. 18: 

 131. 1883. 



Southern Apache County and northern Gila County to Cochise 

 County, 5,000 to 6,000 feet, May and June. New Mexico, Arizona, 

 and Mexico. 



The plant grows with, and is presumably parasitic on, species of 

 Pinus, Cupressus, Juglans, and Quercus. The plant resembles a cluster 

 of slender pine cones, reaching a length of about 25 cm. in fruit. 



2. OROBANCHE. 5 " Broomrape 



Plants glandular-pilose, purplish or yellowish brown; inflorescences 

 loosely fasciculate or densely spikelike; calyx 5-cleft; corolla more or 

 less curved, the upper lip 2-lobed. 



These plants are sometimes called cancer-root, in reference to their 

 reputed efficacy in treatment of ulcers, by application of the stems to 



fi0 References: Mtjnz, P. A. the north American species of orobanche, section myzorrhiza. Tor- 

 rey Bot. Club Bui. 57: 611-624. 1930. Achey, D. M. a revision of the section 

 gymnocatjlis of the genus orobanche. Torrey Bot. Club Bui. 60: 441-451. 1933. 



