Stallergenes Greer

Allergenic Weeds of Houston



Pollen allergens with hyperlinks are available in GREER's catalog. Click on the allergen that you are interested in and connect with that item in GREER's catalog.

To learn more about a particular pollen allergen, click on the PDF icon [PDF] of that allergen. These botanical profiles are available for download and include a detailed profile, genus/species and family, location(s) found in the United States and photograph(s) of the pollen.


Marked Cells () signify taxon present in area. Unmarked Cells signify taxon absent in area or unconfirmed.

1 Cross-reactive species grouped together in colored cells
2 Italicized species demonstrate only moderate cross-reactivity with other(s) in the group
3 This species is insect-pollinated

Most weeds pollinate in the fall.

Waller   Montgomery   Liberty   Harris   Fort Bend   Brazoria   Galveston   Chambers
Cross-Reactive Weeds 1                              
                               
32: Careless Weed             x           x    
52: Pigweed, Rough/Redroot : Click for botanical profile                         x    
53: Pigweed, Spiny : Click for botanical profile                 x   x   x    
                               
55: Ragweed, Giant : Click for botanical profile             x                
56: Ragweed, Short : Click for botanical profile             x                
58: Ragweed, Western : Click for botanical profile             x       x   x    
                               
Other Weeds                              
                               
225: Baccharis : Click for botanical profile x       x   x   x   x   x   x
33: Cocklebur : Click for botanical profile                         x   x
35: Dock, Yellow/Curly : Click for botanical profile                     x        
37: Goldenrod 3 : Click for botanical profile x   x   x   x   x   x   x   x
45: Marsh Elder, True/Rough : Click for botanical profile             x           x   x
36: Nettle : Click for botanical profile                 x   x   x   x
54: Plantain, English : Click for botanical profile             x           x   x
48: Prairie Sage/Darklf. Mugwort : Click for botanical profile                         x   x
59: Russian Thistle : Click for botanical profile                         x   x

Data obtained from USDA Plants Database.


For current pollen counts visit www.pollen.com or enter a zip code below.

 

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