|Photo by Ronald Calhoun (copyright!)|
The other garden weeds I consider also-rans. In my more intensively managed beds, there is lambquarters, black nightshade and a bit of plantain (Plantago spp.). In the less-managed shrub borders, I struggle with two species of Cardamine, motherwort, celandine (Chelidonium majus) with the orange sap, and foxtails (Setaria). In shady edges, Impatiens pallida is abundant.
|Corydalis incisa (photo by Arrowhead Alpines)|
And let's not forget the woodies which went unmentioned in my last post: common buckthorn, redbud (I've heard several complaints about this plant from others this season), poison-ivy, etc.
Here's an off-the-cuff top-10 list of worst weeds submitted to me by Tony Reznicek of the University of Michigan Herbarium:
1. Oxalis sp. (O. stricta, O. dillenii, and even O. corniculata)
2. Digitaria sanguinalis (hairy crabgrass)
3. Conyza canadensis (horseweed)
4. Erigeron annuus (annual fleabane)
5. Setaria sp (foxtail grass)
6. Medicago lupulina (black medic)
7. Shrub seedlings (Lonicera sp., Rhamnus sp.)
8. Tree seedlings (Quercus sp., Juglans nigra, Cercis canadensis especially)
9. Solidago sp.(goldenrods, especially S. altissima)
10. Taraxacum officinale (dandelion, mostly in my paths)