unhealthy fern leaves growing on oil palm trunk

oil palm fern yellow epiphyte tropical frond pyrrosia rupestris leaves leaf green creeper climber vine tree trunk overgrowth grow adnascens grass nature plant environment wild wood bark flora foliage summer branch stump shrub disease outgrowth parasite moss anomaly agriculture evergreen vegetation countryside plantation polypodiales dry brown bracken broad buckler dryopteris dilatata