Summary
Tree pollen was high in Cape Town and Bloemfontein. Flowering trees include cypress, mulberry, plane, olive, poplar and mulberry.
Cape Town
Tree pollen was high and included mulberry (Moraceae), pine (Pinaceae), yellowwood (Podocarpaceae), cypress (Cupressaceae) hackberry (Celtis), waxberry (Morella), sumac (Anacardiaceae)and olive (Oleaceae). Weeds were protea (Proteaceae), sorrel (Rumex) and bulrush (Typhaceae) and moulds were low.
Johannesburg
Tree counts are still low and include hackberry, the dominant tree plane (Platanaceae), hackberry (Celtis), cypress (Cupressaceae), beech (Fagus), ash (Fraxinus), pine (Pinaceae), yellowwood (Podocarpaceae) and mulberry (Moraceae). No weed pollen was detected and grasses and moulds were low.
Pretoria
All pollen concentrations would be low at this time of the year. Trees might be cypress (Cupressaceae), pine (Pinaceae), willow (Salicaceae). Poplar (Populaceae), linden (Tiliaceae), mulberry (Moraceae), yellowwood (Podocarpaceae), birch (Betula), karee (Searsia) and oak (Quercus). Weeds might be nettles (Urtiacacea), mallows (Malvaceae), hop-bush (Dodonaea), the carnation family (Caryophyllaceae), erica (Ericaceae), spurges (Euphorbiaceae) and the daisy family (Asteraceae). Moulds would be low. 6-year means were used.
Bloemfontein
Tree pollen is significant at this site and includes the dominant tree poplar (Populaceae), birch (Betula), false olive (Buddleia), hackberry (Celtis), cypress (Cupressaceae), ash (Fraxinus), plane (Platanaceae), pine (Pinaceae), yellowwood (Podocarpaceae), oak (Quercus) and elm (Ulmaceae). Weeds were low and included pigmyweeds (Crassulaceae), sedges (Cyperaceae) and erica (Ericaceae). Grasses were low, as were moulds.
Kimberley
Tree, grass and weed pollen was low at this sampling site. Trees included birch (Betula), hackberry (Combretaceae), cypress (Cupressaceae), olive (Oleaceae), pine (Pinaceae) and karee (Searsia). Weeds were the daisy family (Asteraceae) and erica (Ericaceae) and moulds were low.
Durban
Tree and weed pollen was low at this site and no grass pollen was detected. Trees included the monkey puzzle tree (Araucariaceae). Birch (Betula), pecan (Carya), cypress (Cupressaceae), ash (Fraxinus), mulberry (Moraceae), waxberry (Morella), pine (Pinaceae), yellowwood (Podocarpaceae), poplar (Populaceae) and oak (Quercus). Weeds were goosefoot (Chenopodiaceae), plantain (Plantaginaceae), lily (Liliaceae), pigmyweeds (Crassulaceae) nightshade (Solanaceae), bulrush (Typhaceae) and nettles (Urticaceae) and fern spores (Polypodiaceae) were seen. Moulds were low.
Gqeberha
Pollen in all three categories was low. Trees were cedar (Cedrus), and pine (Pinaceae) and weeds were pigweed (Amaranthaceae), erica (Ericaceae) and slangbos (Stoebe-type). Moulds were low.
George
All pollen concentrations would be low at this time of the year at this sampling site. Trees might be cypress (Cupressaceae), waxberry (Morella) and yellowwood (Podocarpaceae) and weeds might be spurges (Euphorbiaceae), erica (Ericaceae) and protea (Proteaceae). Moulds would be low. 2-year means were used.
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