162 
NATURE STUDY AND AGRICULTURE 
Birp’s-EYE View oF Our Commonest FARM AND GARDEN WEEDS 
GENERAL TYPE 
NAME 
Lire CycLe 
SPECIAL FEATURES 
{ 1 Great Ragweed | Annual |{ The tallest weeds by the 
Very a and | 2 Marsh Elder Annual || roadside — 
coarse plants 3 Annual Wormwood] Annual | Has a very bitter odor 
4 Lamb’s Quarters | Annual Often called pigweed 
5 Burdock Biennial | Round, hooked burs 
6 Purslane Annual | Thick, smooth leaves 
Lie flat upon 7 Spotted Spurge Annual | Milky juice 
the ground 8 Prostrate Ama- | Annual Thinner leaves than Purs- 
ranth lane 
{ 9 Wild Morning : 
Vines Glory Perennial | Showy white flowers 
| ro Wild Buckwheat | Annual Flowers inconspicuous 
Very prickly | [{ 
leaves ; : eee ; 
fowerscoinal. 22 Common Thistles Biennial Flowers in large heads 
posite, pur-| | *? Canada Thistle Perennial | Heads much smaller than 
ple [ the preceding 
f 
ee 13 Russian Thistle Annual | Very bushy form 
Flowers green; | f 
look like | | 14 Red Root Annual | Also called Rough Pigweed 
cluster of { 15 White Amaranth | Annual | Plant is pale green 
hairy chaff ( 
16 Yellow Foxtail Annual | Heads form a dense spike 
17 Green Foxtail Annual | Heads form a dense spike 
18 Barnyard Grass Annual | Flowers in a compact 
Grass family panicle 
19 Old Witch Grass | Annual | Flowers in an open panicle 
20 Wild Oats Annual | Looks like cultivated oats 
| 2n Quack Grass Perennial | Underground stems 
