Heuchera 



Saxifragaceae 



517 



Heuchera Richardsonn var. affinis 

 Rosendahl, Butlers , & lakela 



Jan. 



feb 



M.v 



Apr 



May 



June 



July 



Aug 



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Oct. 



Nov. 



Dec. 



Miles 



50 



Map 1072 



Heuchera Richardsonn var. Orayana 

 Rosendahl Butters & Lakela 



50 



Map 1073 



Heuchera villosa var macrorhiza 

 (Small) Rosendahl, Butters, & Lakela 



Outside of calyx villous with long white hairs; plants in our area growing in the 

 crevices of cliffs or rarely in the talus at their bases. 



Lobes of leaves triangular 3. H. villosa var. macrorhiza. 



Lobes of leaves rounded 4. H. parvifloira var. Rugelii. 



1. Heuchera americana L. var. brevipetala Rosendahl, Butters, & 

 Lakela. (Heuchera americana of many American authors.) Map 1068. 

 This is our most common alumroot and is frequent throughout the state 

 although there are no records from the northwestern part. It is generally 

 found on or near the tops of wooded slopes along streams or on the slopes 

 of ravines. According to the monographers of the genus, the typical form 

 of this species is restricted to the Appalachian Mountains from southern 

 Pennsylvania southward to North Carolina and Tennessee and this variety 

 and the two following are the western allies of it. 



Conn., Pa., s. Ont., and se. Mich., southw. to Md., Tenn., Mo., and Okla. 



la. Heuchera americana var. interior Rosendahl, Butters, & Lakela. 

 Map 1069. The habitat of this variety is the same as that of the preceding- 

 one, but the plant is probably less frequent. 



Ind. to e. Kans., southw. to w. Tenn. and n. Ark. 



lb. Heuchera americana var. hirsuticaulis ( Wheelock) Rosendahl, But- 

 ters, & Lakela. (Heuchera hirsuticaulis Wheelock.) Map 1070. The 

 habitat of this variety is similar to that of the preceding. This variety, 

 in its morphology, is about midway between the species and Heuchera 

 Richardsonii R. Br., which is restricted to the eastern Rocky Mountains 

 and plains, and seems to have a range about midway between the two 

 species with its eastern extension in west central Indiana. 



Ind., 111., and Mo. 



2. Heuchera Richardsonii R. Br. var. affinis Rosendahl, Butters, & 

 Lakela. Map 1071. This alumroot prefers sandy soil and grows mostly 

 on the slopes and banks of streams and lakes. Our specimens are all from 



