694 



Cactaceae 



Opuntia 



50 



Map 1457 



Passiflora incarnata L 



50 



Map 1458 



Opuntia humifusa Raf 



30 

 Map 1459 



Dirca palustns 



Wyandotte Cave but I was not prepared to preserve a specimen. I have 

 it from two places along the Ohio River above Cannelton in Perry County 

 and from one place along the Ohio River about 3 miles above Mauckport 

 in Harrison County. Charles M. Ek found a large colony in hard, clay 

 soil along a railroad embankment a quarter of a mile north of Galveston, 

 Cass County. 



Pa. to Mo., southw. to Fla. and Tex. 



210. CACTACEAE Lindl. Cactus Family 



5417. OPUNTIA [Tourn.] Mill. 



1. Opuntia humifusa Raf. Prickly Pear. Map 1458. Usually in very 

 sandy soil but in Harrison, Jefferson, and Jennings Counties it is found 

 in a friable clay soil. It forms large colonies and becomes an obnoxious 

 weed, especially on the bluff of the Ohio River north of Madison. 



Mass., s. Ont., n. 111. to Mo., southw. to Va. and Tenn., and in the mts. 

 to Ga. and Ala. 



The Indiana species of Opuntia are not well understood. The most recent 

 revision of the genus would refer all of our reports of Opuntia vulgaris 

 Mill, to this species (under the synonymous name, Opuntia Opuntia (L.) 

 Karst). (See Britton and Rose. The Cactaceae 1 : 127-129. 1919.) 



214. THYMELAEACEAE Reich. Mezerum Family 



5448. DIRCA L. 



1. Dirca palustris L. Leatherwood. Map 1459. Infrequent through- 

 out the state except in the northwestern and southwestern parts from 

 which there are no records. In the northern part of the state it is usually 

 found in rich soil, in beech and sugar maple woods, generally carpeted 

 with a deep leaf mold, more rarely in wet woods, and in a tamarack bog 

 in Steuben County. In the southern part, it usually occurs on the lower 

 part of wooded slopes along streams. An exceptional habitat is its occur- 



