Oxalis stricta
Yellow Wood Sorrel
Oxalidaceae
Native to North America
Field Notes: 09/17/14 Found in backyard lawn of Columbus, OH. Disturbed land, dry soil, surrounded by other weeds. The alternate leaves of the Yellow Wood Sorrel have distinctive heart-shaped leaflets. There are three palmate leaflets in each group of leaflets. The yellow blooms have not fully bloomed yet, they bloom anytime between July and October.
Oxalis corniculata
Creeping Wood Sorrel
Oxalidaceae
Native to United States of America
Field Notes: 09/17/14 Found in backyard lawn of Columbus, OH. Disturbed land, dry soil, surrounded by other weeds.
Plantago aristata
Bracted Plantain
Plantaginaceae
Native to United States of America
Field Notes: 09/17/14 Found in backyard lawn of Columbus, OH. Disturbed land, dry soil, surrounded by other weeds.
Pull them quickly before they seed. After that point, the next years become even more work.
How do you rid your flower bed of these 3 leaf clover type plants?
Found this, which matches my experience:
“Common yellow woodsorrel is best controlled by hand weeding and mulching. It pulls up quite easily and does not resprout from roots left behind. Try to remove plants before seed pods develop – although this may be difficult as it is good at hiding among other plants, producing seeds before it is ever noticed. Most herbicides are not very effective on Oxalis species. Pre-emergence herbicides, which prevent germination, are the most useful.
– Susan Mahr, University of Wisconsin – Madison”