PHENOLOGY OF WEEDS 789 



BLOOMING PERIOD OF COMMON WEEDS-CoNTiNtTED. 



Bumex oibtusifoUus P. Bitter dock 



Saponaria iMccaria A. Cow-herb 



Sida spinosa A. Prickly sida '. 



Sisymbrmm altissimwm A. or B. Tall hedge mustard . 



Btaehys palustris P. Woundwort 



Teucriv/m ccmadmse P. G-ermander 



Tribulus terrestr'is A. Caltifep 



Yerbascnim thapsus B. Mullein 



Vertena hastata P. Blue vervain 



Brorrms hordeaceus A. Soft chess 



Agrostemma githago A. Corn cockle 



Veriena striata P. Hoary vervain 



Atriplex patula A. Orach 



AcnMa tuherciblata A. Water hemp. 



Avena fatua A. Wild oats 



Amirosia artemisiifoTia A. Small ragweed 



Amhrosia trifida A. Large ragweed 



Arotium, fappa B. Burdock 



Bidens. cenvua A. Sticktight 



Bidens diseoidea A. Sticktight 



Bidems frondom A. Sticktight 



Gfienapodium Tiy'bridum, A. Maple-leaved goosefoot. . 



Giohorium intybus P. Chicory 



Cirsium discolor B. Field thistle 



Cirsium ioense B. Iowa Thistle 



Cirsium lanceoXatum B. Bull thistle 



Gleome serrutata A. Stinking clover 



Gusouta arvensis A. Field dodder 



Digitaria humifusa A. Smooth crab grass 



Dy&sodia pappo&a A. Fetid marigold 



Eragrostis pilosa A. Pilose eragrostis 



ErecMites hieracifoUa A. Fireweed 



Eupatorium urticmefoHum P. White snakeroot 



Gawa tiennis B. Gaura 



Oonolotus laevis P. Anele-nod 



HelicmtJius annuus A. (Wild) Sunflower 



Ipomoea hederacea A. Wild morning-glory 



Iva xantMfolia A. Poverty weed 



Kochia scoparia A. Kochia. 



Lotiv.m pererme P. Rye grass 



MeUlotus officinalis A. or B. Yellow sweet clover. . 



Mentha spicata P. Spearmint 



Phy salts sulgXabrata P. Smooth ish ground cherry. . 



Polygonum convolvulus A. Black bindweed 



Polygonum erectum A. Erect knotweed 



Polygonum hydropiper A. Water pepper 



Polygonum muhJerifiergii P. Tanweed 



Polygonum pennsylvanicum, A. Pennsylvania smart- 

 weed 



Polygonum, ramasissimum A. Branching knotweed. . 



PotentiUa mofispeHensis B. or P. Five-finger 



Salsoia kali var. tenuAfolia A. Russian thistle 



Scrophulariu maryiandica P. Simpson's honey plaiit . 

 Setaria glauca A. Yellow foxtail 



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