SCHOOLCRAFT COUNTY AND VICINITY 83 



ALISMACEAE. Water-plantain Family 



Sagittaria latifolia Willd. Broad-leaved arrow-head. In ditcli- s, 

 muddy places, shallow water about ponds, and along streams. Plentiful. 



Alis?7ia plan tag o-aquatica L. American water-plantain. In shallow 

 water, muddy places, and along streams. Often abundant. 



HYDROCHARITACEAE. Frog's-bit Family 



El odea canadensis Michx. Waterweed. In ditches, coves, pond-, 

 small lakes and along slow streams. Often abundant. 



Vallisneria spiralis L. Tape grass. Wild celery. In ponds and slow 

 streams. Abundant. Said to be a fine duck food. 



GRAMINEAE. Grass Family 



Digitaria humifusa Pers. (Syntherisma ischaemum (Schreb. (Nash). 

 Small crab-grass. Occasional on poor sandy ground, in cultivated fields 

 and waste places. A weed but not very troublesome. Usually prostral e. 



Digitaria sanguinalis (L.) Scop. (Syntherisma sanguinale (L.) Dulac), 

 Large crab-grass. Finger-grass. A miserable weed in cities and village is . 

 gardens, fields and waste places. 



Panicum capillare L. Old- witch grass. Usually preferring dr}' sandy 

 ground. Common as a weed about cities and villages, in gardens, fields, 

 and waste places. 



Panicum depauperatum Muhl. Starved panic-grass. In dry open 

 ground. Apparently infrequent. 



Panicum subvillosum Ashe. Spreading panic-grass. Along or near 

 sandy beaches of Lake Michigan and Lake Superior and on dry open 

 ground throughout. Frequent. 



Echinochloa crusgalli (L.) Beauv. Barnyard-grass. Summer-grass. 

 Usually preferring damp cultivated grounds, but as a weed will be found 

 in most all gardens, fields and waste places. Very variable. 



Setaria glauca (L.) Beauv. (Chaetochloa glauca (L.) Scribn.). Yellow 

 foxtail. Pigeon-grass. A common weed in almost all cultivated ground-. 

 In general appearance much like the following. 



Setaria viridis (L.) Beauv. (Chaetochloa viridis (L.) Scribn.). Green 

 foxtail. Frequent in cultivated grounds and waste places. Much like 

 the preceding in general appearance. 



Cenchrus carolinianus Walt. Small bur-grass. Usually in dry sandy 

 open ground and gradually becoming more frequent. A miserable weed 

 with a cruel spiny bur and often called sand-bur. 



Zizania palustris L. Indian rice. Wild rice. In ponds, small lakes 

 and streams, apparently planted by sportsmen to attract ducks. Abun- 

 dant in the Tahquamenon River in Luce County. 



