CAPRIFOLIACEAE: Honeysuckle family

KEY TO SYMPHORICARPOS SPECIES

1. Twigs glabrous or with hairs to ca 0.2 mm; pith of overwintering twigs absent, twigs hollow ........................................................ 1. S. albus

1. Twigs with hairs to 0.5 mm; pith of overwintering twigs usually continuous ............................................................... 2. S. orbiculatus