Table 2 Cup a 1 homolog content in selected Cupressales species. “N/A” (Not Available) denotes that the measurement was not performed for that given sample. “BLQ” (Below Limit of Quantification) indicates that the results were below the quantification limit of the method. Dash (–) indicates that the mean could not be calculated due to mathematical reasons, as the results were below the detection limit.

From: Allergenic potential of ornamental Cupressales species and its consequences for urban planting

Species

Cup a 1 homolog content (pg/pollen grain)

Season 2023

Season 2024

Mean

Callitropsis nootkatensis

2.432

1.738

2.085

Chamaecyparis lawsoniana

0.004

BLQ

0.004

Juniperus virginiana

N/A

1.006

1.006

Juniperus communis

0.956

0.971

0.964

Juniperus x pfitzeriana

0.663

1.094

0.879

Juniperus sabina

1.048

0.624

0.836

Juniperus chinensis

0.257

0.658

0.471

Taxus baccata

0.014

BLQ

0.014

Thuja occidentalis

BLQ

BLQ

Thuja plicata

0.082

BLQ

0.082