Blackstonia

Blackstonia perfoliata

Yellow-wort

Blackstonia imperfoliata

Blackstonia acuminata subsp. aestiva

Blackstonia acuminata subsp. acuminata

Blackstonia perfoliata subsp. intermedia

Blackstonia perfoliata subsp. perfoliata

Blackstonia acuminata

Blackstonia grandiflora