4.1.99.5 leaf apical meristem and its enclosing unopened leaflets from 28-36 days old plants 648391 4.1.99.5 leaf young rapidly growing 648395 4.1.99.5 meristem apical meristem and its enclosing unopened leaflets from 28-36 days old plants 648391 4.1.99.5 uropygial gland - 648392