
Redtop seedhead
Plants that are allergenic or that cause dermatitis or mechanical injury are annoying, but the victim usually recovers. Wind-blown pollen generated by trees, grass, plants, and weeds can cause airbone allergies to some people. For the 40-50 million allergy sufferers in America, inhaling airborne allergens can produce a variety of allergic symptoms and because pollen grains are small and buoyant, they can remain airborne for hundreds of miles.
The following is a partial list of weeds that may cause allergic reactions:
Amaranth, pigweed | Amaranthus spp. |
Annual bluegrass | Poa annua L. |
Barnyardgrass | Echinochloa crus-galli (L.) Beauv. |
Bermudagrass | Cynodon dactylon (L.) Pers. |
Brome | Bromus spp. |
Buffalograss | Buchloe dactyloidos (Nutt.) Engelm. |
Canarygrass | Phalaris spp. |
Cheat | Bromus secalinus L. |
Cocklebur | Xanthium spp. |
Dallisgrass | Paspalum dilatatum Poir. |
Dandelion | Taraxacum spp. |
Dock | Rumax spp. |
Foxtail | Setaria spp. |
Goatgrass | Aegilops spp. |
Hemp | Cannabis sativa L. |
Johnsongrass | Sorghum halepense (L.) Pers. |
Kochia | Kochia scoparia (L.) Schrad. |
Lambsquarters | Chenopodium spp. |
MarsheIder | Iva xanthifolia Nutt. |
Nettle | Urtica spp. |
Orchardgrass | Dactylis glomerata L. |
Plantain | Plantago spp. |
Quackgrass | Agropyron ripens (L.) Beauv. |
Red sorrel | Rumex acetosella L. |
Redtop | Agrostis albaL. |
Russian thistle | Salsoli kali L. |
Ryegrass | Lolium multiflorum Lam. |
Sagebrush | Artemisia spp. |
Saltbrush | Atriplex spp. |
Saltgrass | Distichlis spicata (L.) Greene |
Sudangrass | Sorghum sudanense (Piper) Stapf |
Velvetgrass, common | Holcus lanatus L. |
Wormwood | Artemisia spp. |