25 



POLYGONACEAE 



Rumex L. Dock. Sorrel. 



Patientia L. Patience Dock. Rather uncommon. 



Britannica L. Great Water Dock. Amherst, etc., H. G. Jesup. 



CRISPUS L. Yellow Dock. 



SANGUINEUS L. See Britton and Brown's 111. Flora of n. U. S. 

 and Can., Vol. I, p. 551. 



ELONGATUS Guss. Orchard St., Springfield, L. Andrews. 



ahissimua Wood. Pale Dock. Herb. Spfld Sci. Museum. 



verticillatus L. Swamp Dock. Granby, H. G. Jesup. 



OBTUSiFOLius L. Bitter Dock. 



AcETOSA L. Garden Sorrel. Grassland. Common at Amherst, 

 etc. 



HASTATULUS Baldw, Roadsides, Amherst, S. T. Maynard. 



AcETOSELLA L. Field or Sheep Sorrel. 

 Polygonum [Tourn.] L. Knotweed. 



aviculare L. 



aviculare L. var. vegetum Ledeb. 



erectum L. 



tenue Michx. 



lapathifohum L. 



amphibium L. 



Muhlenbergii (Meisn.) Wats. Springfield, L. Andrews. 



pennsylvanicum L. 



Careyi Olney. East Amherst, etc., C. H. Hitchcock. 



Hydropiper L. Common Smartweed. 



acre HBK. Water Smartweed. 



acre HBK. var. leptostachyum Meisn. Herb. Spfld Sci. Museum, 

 L. Andrews. 



ORIENTALE L. Prince's Feather. 



Persicaria L. Lady's Thumb. Common in barnyards, etc. 



hydropiperoides Michx. Mild Water Pepper. 



virginianum L. 



arifolium L. Halberd-leaved Tear-thumb. 



sagittatum L. Arrow-leaved Tear-thumb. 



Convolvulus L. Black Bindweed. 



cilinode Michx. 



scajidens L. Climbing False Buckwheat. 



cuspidatmn Sieb. and Zucc. Springfield, L. Andrews. Two 

 species, P. Sachalinense Schmidt and cuspidatum, 

 have been cultivated at the Mass. Agricultural 

 College for 15 years. The latter is well estab- 

 lished ; the former, termed Sacaline, does not show 

 a tendency to become so. Both were introduced 

 from Japan as forage plants. 



