PLANTS OF ILLINOIS. 



11 



var. androcladum, Gray. S. 



Wabash county. Schneek. 



var. angnstifoliam, Gray. N. 



McHenry county, Vasey. 



NAIADACEJE. 



XAIAS 



rlexilis, Rostk. 



Ponds. Frequent. 



Indica, var. gracillima, Braun. 

 Ponds. Wabash county, Schneek. 



ZANNICHBLLIA 

 palustris, L. 



Ponds. Peoria, Menard. Fulton and Henderson 

 counties, and probably elsewhere, but Scarce. 



POTAMOGETON 



natans, L. 



Ponds. Frequent. 



Claytonii, Tuckerman. 



Fulton county. Wolf. 



Vaseyi, Robbins. N. 



Near Ringwood, McHenry county. Vasey. 



Spirillus, Tuckerman. 



McHenry county. Vasey. 



hybridus. Michx. 



Pond?. Infrequent. 



rufescens, Schrader. X. 



McHenry county. Vasey. 



lonchites, Tuckerman. X. 



Chicago. Babcock ; McHenry county. Vasey. 



palcher, Tuckerman. 



Mason county. Hall. 



gramineus, L. 



Near Chicago, Babcock : McHenry county. Va- 

 sey : Hancock. Mead. 



Incens, L. 



McHenry county. Vasey : Kankakee. Hl1 : Wa- 

 bash, Schneek. 



perfoliatus, L. 



McHenry county. Vasey : Kankakee. Hi!:. 



compressus, L. 



McHenry county. Vasey ; Kankakee. Hill : Me- 

 nard. Hal!. 



pauciflorus, Parsb. 



Peoria county, Brendel : Kankakee. Hill ; Mc- 

 Henry. Vasey. 



pusillus. L. 



Peoria and Fulton counties, Brendel, Wolf : Me- 

 nard. Hall. 



pectinatus, L. 



Ponds. 



Frequent. 



ALISMACE.E. 



TRIGLOCHIX 



palustre, L. X. 



Peoria county. Brendel : Kane and McHenry, 



Vasey. 



maritimum, L. X-E. 



Chicago, Babcock : McHenry count}-. Vasey. 

 SCHEUCHZERIA 



palustris, L. C. & X. 



Menard county. Hall : McHenry. Vasey. 

 ALISMA 



Plantago, L., var. Americanum, Gr. 



Margins of ponds. Ac. Common. 



ECHIXODORUS 



parvulus, Engelm. 



Mason and Cass counties. Mead. 



rostratus, Engelm. C. & S. 



About ponds, Ac. Peoria county. Brendel : and 

 southward. 



radicans, Engelm. 



Menard county. Hail : and southward. 



5AGITTARIA 



variabilis. Engelm. 



Common. 



Ponds and ditches. 



ealycina. Engelm. 



Margins of ponds in Mississippi bottoms about 

 Oquawka. Henderson county : Menard county, 

 Hall. Rare.* 



heterophylla, Pursh. 



Ponds, often in water two or three feet deep. 



Frequent. 



graminea, Michx. 



Margins of ponds. Scarce. 



HYDROCHARIDACEJE. 



LIMNOBIUM 



Spongia, Richard. 



Ponds. Union county. Vasey. Brendel. 

 AXACHARIS 



Canadensis. Planchon. 



S. 



Ponds and slow streams. 



Common. 



