Section 20. No nursery stock shall be brought into the commonwealth unless it bears an unexpired certificate of inspection. Each person bringing into the commonwealth, or receiving for transportation to a point within the commonwealth from outside thereof, any car, box, bundle, package or consignment in any form, of living trees, shrubs or plants commonly known as nursery stock, shall immediately notify the director of the fact that such consignment has been received by him and give the name and address of the consignee, together with such further report as may be lawfully required by the director.