Polygonum 



POLYGONACEAE 



415 



50 



Map 846 



Polygonum Careyi Olney 



o ~3o 



Map 847 

 Polygonum Hydropiper L. 



var. projectum Stanford 



50 



Map 848 



Polygonum punctatum Ell. 



1927.) Water Pepper. Map 847. Infrequent to frequent in moist soil 

 along streams, roadsides, and ditches, about lakes, ponds, and sloughs, 

 and in low ground in fields and woodland. 



N. S. and Que. to Wis., southw. to Ga. and Okla., and westw. to Calif. 



14. Polygonum punctatum Ell. (Polygonum acre HBK. and var. lepto- 

 stachyum Meisn. and PersicaHa punctata (Ell.) Small.) (Stanford. Poly- 

 gonum Hydropiper in Europe and North America. Rhodora 29 : 77-87. 

 1927.) Water Smartweed. Map 848. Frequent to common in all parts 

 of the state in habitats similar to those of the preceding species. 



Probably throughout N. A. except the extreme north. 



15. Polygonum Persic aria L. {PersicaHa Persicaria (L.) Small.) 

 Lady's Thumb. Map 849. Frequent throughout the state in wet ground 

 along roadsides and streams and in woodland and fallow fields. This 

 species begins to flower much earlier than P. hydropiperoides. It and 

 others of the genus are the source of smartweed honey. 



Nat. of Eu. ; throughout N. A. except the extreme north. 



16. Polygonum hydropiperoides Michx. (Persicaria hydropiperoides 

 (Michx.) Small.) (Stanford. Polygonum hydropiperoides and P. opelou- 

 sanum. Rhodora 28 : 22-29. 1926.) Mild Water Pepper. Map 850. Fre- 

 quent throughout the state in dried-up ponds and sloughs, in wet ground 

 along streams and about lakes, and in marshes and ditches. 



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



16a. Polygonum hydropiperoides var. strigosum (Small) Stanford. This 

 variety was reported from Indiana by Small. It is separated from the 

 species by having a strigose-pubescent stem. The stems of the specimens 

 at hand vary from glabrous below the nodes to densely strigose for a 

 third of the length of the internode. One branch of a specimen may have 

 all of the internodes glabrous and another have some of the internodes 

 strigose below the nodes. Since a close lineal series from glabrous to 



