Scirpus 



Cyperaceae 



197 



o 5o 



Map 378 



Scirpus cyperinus (L.) Kunth 



and along streams. This species is extremely variable throughout its 

 range in the grouping or segregation of the spikelets, the color of the 

 involucre and involucels, and the color of the scales of the spikelets. 

 Some authors do not recognize these differences while others do. I am 

 dividing the species into the commonly recognized forms in order that 

 those who do wish to separate these forms may have the advantage of 

 the experience of other authors. The range of the several forms has not 

 yet been ascertained and the range of the aggregate is given here. 

 Newf., Ont. to Sask., southw. to Fla. and La. 



12a. Scirpus cyperinus f. Andrewsii (Fern.) Carpenter. (Dole. Flora of 

 Vermont, p. 74. 1937.) This form has been found only in Allen County. 



12b. Scirpus cyperinus var. pelius Fern. This form is very local and is 

 found in the habitat of the species. I have it only from Allen, Jasper, and 

 Whitley Counties. 



Newf. to Ont. and Minn., southw. to Conn., N. Y., Ind., and Wis. 



12c. Scirpus cyperinus var. pelius f. condensatus (Fern.) Blake. Found 

 only in La Porte and Porter Counties. Its general range is that of the 

 variety. 



13. Scirpus Eriophorum Michx. Map 378-1. A botanical authority has 

 referred to this species four sheets of my specimens of the Scirpus 

 cyperinus-pedicellatus complex. It is to be noted that Britton and Brown, 

 Illustrated Flora, ed. 2, refer this species and the next one to Scirpus 

 cyperinus. 



Conn, to Fla., westw. to La. and northw. in the Mississippi Valley to 

 Ind. 



14. Scirpus pedicellatus Fern. Map 379. This so-called species is infre- 

 quent and is found throughout the state in habitats similar to those of 

 Scirpus cyperinus. 



E. Que., southw. to Conn., N. Y., Ind., and Wis. 



