121 
1051. L. perpusilla, Torr. 
Calumet Region; rare. A few fertile specimens were found near 
Hyde Lake, Ind., August 15th, 1884. (B. P.) 
1052. L. minor, L. 
In stagnant water; common. 
Found in flower in July, 1886, C. P. Murray ! 
WOLFFXA, Horkel. 
1053. W. Columbiana, Karsten. Wolffla. 
South end of Berry Lake, Ind., in stagnant places, floating just 
beneath the water; -J- to f of an inch long. Bayous of Calumet 
river, South Chicago, Mill! (B.) 
ALISMA, L. 
y-1054. A. plantago, L. 
. Aquatic ; common. 
ALXSMACEJE. 
Water Plantain. 
July — September. 
SAGITTARIA, L. Arrowhead. 
1055. S. variabilis, Engelm, Common Arrowhead. 
Aquatic or in swampy places; abundant. July — August. 
& The following varieties, or forms, are common and found with the type : 
obtusa, Gray; angustifolia, Gray; gracilis, Engelm. The latter on 
the authority of Babcock. A form with double flowers was found 
at Hinsdale by Mr. C. J. Fellows, Babcock , and a few similar 
specimens were collected near Pullman in 1885. 
Var. latifolia occurs at South Chicago, Williams. 
1056. S. heterophylla, Ph. 
In swamps, chiefly southeast; infrequent. August. (B.) 
1057. S. heterophylla, Ph., var. angustifolia, Engelm. 
Near Miller’s, Ind. ; rare. (B. P.) 
1058. S. heterophylla, Ph., var. rigida, Engelm. 
Calumet river, near Miller’s, Ind. ; rare. August. (B. P.) 
Calumet river, near South Chicago, Hill . 
1059. S. graminea, Michx. 
Ditches and swamps; frequent from Hyde Park south. July — 
August, sometimes as early as June 15th. 
NAIAD ACE2E. 
TRIGLOCHIN, L. Arrow-grass. 
1060. T. palustris, L. 
A few specimens were noticed in a swamp near Sheffield, Ind.; rare. 
August, 1884-’85. (B.) 
