Definition of "subsp."

We'd parked in the entrance to St Mary's cemetery (10/6079), and a short detour to the church also gave us Blechnum spicant and Dryopteris affinis subspp. affinis and borreri on the sides of the track leading to it. On the mortared walls within the churchyard we then found Asplenium ruta-muraria, A. trichomanes subsp. quadrivalens, A. scolopendrium and A. ceterach.

2003, Bryan Smith, “National Field Meetings 2003; South-west Ireland—24–30 May: Blarney to Glengarriff, Co. Cork (Saturday)”, in The Bulletin of the British Pteridological Society, volume 6, number 2 (in English), page 89