196 



Cyperaceae 



Scirpus 



50 



Map 374 



Scirpus atrovirens Muhl. 



55 



Map 375 ' 

 Scirpus atrovirens 

 var. georgianus (Harper) Fern. 



9. Scirpus atrovirens Muhl. Map 374. Frequent to common in almost 

 all parts of the state. It is usually found in wet, mucky soil in ditches 

 and ponds, along streams, and about lakes. One can infrequently find 

 a specimen in which the rays of the inflorescence are short and the 

 glomerules form a closed head. This form has received a name but I do 

 not believe it is of taxonomic significance. 



Maine to Sask., southw. to Ga. and Mo. 



9a. Scirpus atrovirens var. georgianus (Harper) Fern. (Rhodora 23: 

 134. 1921.) (Scirpus georgianus Harper.) Map 375. This variety is 

 infrequent in the southern half of the state, becoming rare in our north- 

 ern counties. The species and variety are distinct in their extremes but 

 they so intergrade that their separation is not entirely satisfactory. 



Newf. to Wis., southw. to Ga. and Ark. 



9b. Scirpus atrovirens f. proliferus Hermann. This is a viviparous 

 form, occasionally with the species. 



10. Scirpus polyphyllus Vahl. Map 376. Infrequent in springy places 

 and in low beech and sweet gum woods in the southern half of the state. 

 Its associates would indicate that it prefers a slightly acid soil. Viviparous 

 forms are rather frequent. 



Western N. E. to Minn., southw. to Ga. and Ark. 



11. Scirpus lineatus Michx. Map 377. This is the most common bulrush 

 of the state. It is frequent throughout and, for the most part, is found 

 in roadside ditches and along low roadsides. It prefers a moist or wet 

 soil along streams, in low, open woodland and fallow fields, and about 

 lakes and sloughs. 



N. H., Ont. to Oreg., southw. to Ga. and Tex. 



12. Scirpus cyperinus (L.) Kunth. Map 378. Infrequent throughout 

 the state in wet grounds of all kinds. It is more common in the lake area 

 in wet places about lakes, in marshes, and along streams ; southward it is 

 found in roadside ditches, ponds, sloughs, sinkholes, and springy places 



