File:Asarina procumbens single ripening seed capsule greatly enlarged.jpg

English: A single unripe seed capsule of Asarina procumbens, the trailing snapdragon, showing hairy peduncle and fruiting calyx lobes and glabrous capsule itself with brown, withered pistil still attached.

Asarina procumbens, the trailing snapdragon, is a protected wildflower native to the Pyrenees, which has nonetheless proved capable of thriving as an attractive weed in some harsh urban environments - notably in the Australian city of Melbourne. The single seed capsule shown here was borne by one of about four specimens (or possibly a single specimen with multiple points of emergence) growing out of a wall in front of the church (site of the Old Smiddy) in the oldest part of the village of Paxton, Scottish Borders (near Berwick-upon-Tweed).

Several specimens of this plant are said to have been growing at this site for quite some time. Given the proximity of the extensive gardens of nearby Paxton House the species may represent either an escape or a deliberate introduction from that estate (around which the village grew).