Echinodorus 



Alismaceae 



87 



50 



Map 105a 

 Alisma Plantago -aquatica L. 

 jar. brevipes (Greene) Samuelsson 



frequent throughout the state, being more common in the lake area where 

 dredged ditches are more frequent. It is found in muddy or mucky soil 

 in ditches, ponds, and sloughs and about lakes. 

 N. S. to Minn., southw. to Fla. and Tex. 



2. Alisma Plantago-aquatica L. var. brevipes (Greene) Samuelsson. 

 Found only in our northern counties with the habitat of the preceding 

 species. This species was unknown to me until I studied my specimens. 

 It is probable that now since I know it, I could find it in more of our 

 northern counties. I have specimens from Lake, Elkhart, and Newton 

 Counties. This is the boreal representative of the genus. 



N. S., Maine, Col. to Wash. 



75. ECHINODORUS Richard 



Scapes (stems) reclining or prostrate, 7-15 dm long, usually rooting at the nodes; 

 leaves cordate, blades 4-15 cm long; flowers in verticils at the nodes, their pedicels 

 2-5 cm long in fruit ; beak of achene a fourth as long as the body. . . 1. E. radioans. 



Scapes erect, 10-30 cm high; leaves cordate, 2-11 cm long; pedicels stiff, 12-15 mm 

 long in fruit; beak of achene half as long as the body 2. E. cordifolius. 



1. Echinodorus radicans (Nutt.) Engelm. Map 106. This species is 

 restricted to the Lower Wabash Valley where it is found on the muddy 

 borders of old river channels. Very local. 



D. C. to Kans., southw. to Fla. and Tex. 



2. Echinodorus cordifolius (L.) Griseb. Map 107. The only specimen 

 of this species known to have been collected in Indiana is one in the 

 herbarium of DePauw University. It was collected by Blatchley on 

 the south side of Conover's Pond, now drained, which was located in the 

 southeast corner of sec. 9, now within the city limits of Terre Haute, 

 Vigo County. This species was reported from Tippecanoe County by 

 Wilson, but his specimen can not be located. 



Ind.. 111. to Mo., southw. to Fla. and Tex. 



