468 The Ohio Naturalist. [Vol. XV, No. 5, 



Warren, Auglaize, Clinton, Adams, Union, Franklin, Shelby, 

 Clarke, Richland, Madison, Green, Gallia, Clermont, Champaign, 

 Fayette, Highland, Wayne. 



11. Circaea (Toum.) L. 



Perennial herbs; leaves opposite, dentate; flowers white in 

 terminal and lateral racenies ; hypanthium extended beyond the 

 ovularly, sepals 2; petals 2; stamens 2; ovulary with 1 or 2 cavi- 

 ties; fruit ol30\^oid, indehiscent, bristly with hooked hairs. 



1. Leaves firm, rounded at the base, slightly toothed; bracts none. 



C. lutelicnui. 



1. Leaves thin, cordate, strongly toothed; with minute bracts. 2. 



2. Petals as long as the calyx; fruit 2-locular, bristly. C. intermedia. 



2. Petals not so long as the calyx, fruit 1-locular, the hairs soft and tender. 



C. alpina. 



1. Circaea lutetiana L. Common Enchanter's-nightshade. 

 Erect finely pubescent herbs 1-2 ft. tall; leaves 1-4 in. ovate, 

 acuminate, rounded at the base; flowers about )i in., broad; 

 fruit )i in. long, bilocular, covered with hooked hairs. General. 



2. Circaea intermedia Ehrh. Intermediate Enchanter's- 

 nightshade. Plants 8-10 in. tall; leaves thin, ovate, middle and 

 upper ones cordate, teeth salient; minute bracts usually present; 

 petals as long as the calyx; fruit as in the above species. No 

 specimens. 



3. Circaea alpina L. Small Enchanter's-nightshade. Plant 

 small 4-12 in. high, glabrate or pubescent, with ovate, coarsely 

 dentate, leaves, usually cordate at the base, }i-2}4 in. long; 

 flowers about Ke in- broad; fruit V\% in. long with soft, hooked 

 hairs, unilocular Lorain, vSummit, Hocking, Cuyahoga, Clarke, 

 Ashtabula. 



