Summary
Tree, grass and weed pollen concentrations were low at all the sampling sites.
Cape Town
Grasses were low. Low tree counts included Australian pine (Casuarina), cypress (Cupressaceae), yellowwood (Podocarpaceae) and poplar (Populaceae). Low weeds included mugwort (Artemisia), sedges (Cyperaceae), hemp (Cannabaceae), goosefoot (Chenopodiaceae), erica (Ericaceae), protea (Proteaceae), bulrush (Typhaceae) and nettles (Urticaceae). Moulds were low.
Johannesburg
Pollen concentrations were very low. Trees included karee (Searsia) and no weeds were seen. Moulds were low.
Pretoria
6-year means are shown. Trees would be gum (Myrtaceae), cypress (Cupressaceae), mulberry (Moraceae), pine (Pinaceae), beech (Fagaceae), bushwillow (Combretaceae), linden (Tiliaceae) and poplar (Populaceae). Weeds might be the daisy family (Asteraceae), plantain (Plantaginaceae), slangbos (Stoebe-type), the carnation family (Caryophyllaceae), sedges (Cyperaceae), spurges (Euphorbiaceae) and mezereum (Thymelaeaceae). Ferns could be present and moulds would be low.
Bloemfontein
Pollen concentrations in all three categories were low. Trees were acacia (Acacia-type), birch (Betula), bushwillow (Combretaceae), hackberry (Celtis), plane (Platanaceae), pine (Pinaceae), karee (Searsia) and oak (Quercus). Weeds were sedges (Cyperaceae) and plantain (Plantaginaceae). Fern spores were seen and moulds were low.
Kimberley
All pollen concentrations were low at this sampling site. Trees were birch (Betula), false olive (Buddleja), bushwillow (Combretaceae), poplar (Populaceae) and karee (Searsia). Weeds were pigmyweeds (Crassulaceae) and sedges (Cyperaceae) and ferns (Polypodiaceae) were seen. Moulds were low.
Durban
6-year means are shown. Trees would be karee (Searsia), waxberry (Morella), protea (Proteaceae), nettles (Urticaceae), the carnation family (Caryophyllaceae) and knotweed (Periscaria). Moulds would be low.
Gqeberha
Pollen counts were low. Trees were cypress (Cupressaceae) and weeds were mugwort (Artemisia). Moulds were low.
George
2-year means are given. Pollen in all three categories would be low. Trees could be yellowwood (Podocarpaceae), pine (Pinaceae) and waxberry (Morella). Weeds might be the daisy family (Asteraceae), reeds (Restionaceae), mugwort (Artemisia), mezereum (Thmelaeaceae) and protea (Proteaceae). Moulds would be low.
Reference Range
Grass: Low: 0-5 Moderate: 6-20 High: 21-200
Trees: Low: 0-15 Moderate: 16-90 High: 91-1500
Weeds: Low: 0-10 Moderate: 10-50 High: 51-500
Moulds: Low: 0-900 Moderate: 900-2500 High 2500-25000
Unit: per cubic metre