littoralis vermiculata hybridizes leucodermis abies elliptica parviflora obscurum Drosera macrocarpum Callistemon coulteri latifolius subsp maculicauda P aristata ovata Phlomis apicalis Themidaceae brevipes cruenta syn Yela scalare sylvestris casuarius platyrhinos Sakacin intergrading closely subspecies fusca americanus gracilis stenophyllum Resedaceae guajava