Key to Weeds 



For weeds amon R the Brasses and composites, lee tb< 



1. Leaves simple 

 a. Leaves nol lobed 01 i ul 



(. I ) Plants rosette like, mat like or i reeping 



(a) Leaves large, S 10 cm. or more, rounded; biennials 

 x. Leaves elliptic to ovate, in a ro 



(x) Leaves parallel veined 



l aves netted-veined, very large 

 ives densely woolly, hairy 

 ii. Leaves not woolly 

 y. Leaves round, on i reeping stems 



(b) Leaves small, 1-3 cm. liiuar to ovate, annuals 

 x. Leaves and stem thick and fleshy, not milky 



y. Leaves and stem milky 

 (x) Leaves and stems hairy 



(y) Leaves and stems smooth 

 in. Seeds faintly transversely ridged and pitted 



n. Seeds stronglj transversely ridged, nol pitted 



z. Leaves and stems neither fleshy nor milky 



(x) Leaves narrow, in whorls 



(y) Leaves broader, alternate 



m. Flowers solitary in the axils 



n. Flowers clustered in the axils 



(2) Plants erect, ascending, decumbent or clim 



(a) Stems climbing 



x. Fruits triangular, flowers inconspicuous 



y. Fruits rounded, flowers large white 



(b) Stems not twining nor climbing 



X. Annuals 



(x) Steins and leaves milky 



Stems and leave-, not milky 



m. Plants bushy, tumbh wi 

 | in i Leaves obo> at< 



I ea\es linear, somewhal ' 

 Stl nis with spiny bl 



• ns not spin) . often red 



n. Plants not bushy, not tumbh 

 (m i Flowers and fruits in terminal • lusl 





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