http://vocab.lternet.edu/vocab/vocab/http://vocab.lternet.edu/vocab/vocab/skos/503shrubs http://vocab.lternet.edu/vocab/vocab/skos/503 stems RT http://vocab.lternet.edu/vocab/vocab/skos/503 understory vegetation RT http://vocab.lternet.edu/vocab/vocab/skos/503 shrub UF http://vocab.lternet.edu/vocab/vocab/skos/503 vascular plants BT