FLOWERING PLAXTS AXD FERNS OF ARIZONA 235 



the White Mountains {Gilbert 112). The f. blumeri Gill {A. blumeri 

 A. Xels.) occurs in the mountains of Graham, Cochise, and Pima 

 Counties, parasitic on Pinus strobiformis. The type of A. blumeri 



was collected by Blumer in the Chiricahua Mountains. The f. cyano- 

 carpum (A. Xels.) Gill (Razoumqfskya cyanocarpa A. Xels.) has been 

 collected in Arizona only on the San Francisco Peaks, 9,800 feet, on 

 Finns aristaia (Leiberg 5884), and at Blue Summit, Greenlee County, 

 on Pinus flexilis {Gill in 1934). 



30. SAXTALACEAE. Sandalwood family 



1. COMAXDRA. Bastard-toadflax 



Plant probably a root parasite, small, herbaceous or nearly so ; leaves 

 alternate, narrow, entire; flowers perfect, small, pink, in terminal 

 corymbose clusters; perianth persistent, urn-shaped, 4- or 5-cleft ; 

 stamens borne on a fleshy disk in the perianth tube; ovary inferior; 

 fruit nutlike, indehiscent, 1 -seeded. 



1. Comandra pallida A. DC. in DC, Prodr. 14: 636. 1857. 



Apache County to Mohave County, south to Cochise and Pima 

 Counties, 4.000 to 8.000 feet, usually in pine woods, April to August. 

 Minnesota to British Columbia, south to Texas. Arizona, and California. 



31. ARISTOLOCHIACEAE. Birthwort family 



1. ARISTOLOCHIA 



Plant herbaceous, perennial; stems from a thick root, trailing; leaves 

 alternate, the blades triangular-hastate, often purplish; flowers per- 

 fect, axillary, solitary; perianth irregular, tubular below, dull greenish 

 and brown purple; ovary inferior; fruit a dehiscent 6-valved capsule; 

 seeds numerous, horizontal, flat. 



1. Aristolochia watsoni Woot. and Standi., Contrib. U. S. Natl. 

 Herbarium 16: 117. 1913. 



Aristolochia brevipes Benth. var. acuminata S. Wats., Arner. 

 Acad. Arts and Sci. Proc. 18: 148. 1883. 



Greenlee County to Maricopa County, south to Cochise, Santa 

 Cruz, and Pima Counties, 2,000 to 4,500 feet, April to September, 

 type from southern Arizona or northern Sonora. Western Texas to 

 southern Arizona. 



Known locally as "indianroot."" and reported to have been used 

 medicinally, especially as a remedy for snake bite, by Indians and by 

 the white settlers. The flowers, as in many tropical species, have a 

 putrid odor and are so constructed as to capture insects. 



32. RAFFLESIACEAE. Rafflesia family 



1. PILOSTYLES 



Plant parasitic, with only the small brown flowers and a few sub- 

 tending bracts visible outside the bark of the host; flowers unisexual 

 (dioecious?), the perianth of 4 or 5 separate segments similar to the 



