Hello: http://aphis.usda.gov/import_export/plants/… TABLE 7-2 List of Bulbs (B) and Underground Portions of Dormant Perennials (DP) That Are Eligible for Preclearance (continued) Just found other interesting items to me. And thus I have some questions about them: 1.May the classification imply the difference between evergreen species and deciduous species? (Or it behaves as evergreen or deciduous in the place where is not their native environment.) Agapanthus, if tuberous roots Liliaceae DP tuberous roots Agapanthus, if rhizome Liliaceae B rhizome 2.May the classification may the difference between the life span of the adventitious roots? (The adventitious root renew every growing cycle or not. May It varies in different area even in the same species?) This mean a lot to me. Because the the underground part of Hemerocallis (host of Radopholus similis ) from the pest area of Radopholus similis is controlled. Only the rhizome is allowed, the other kinds of underground part such as adventitious roots and storage root are prohibited. (Basicaly speaking, no fresh adventitious roots is allowed while imported as dormant bulbs of every species.) Hemerocallis, if rhizome Liliaceae B rhizome Hemerocallis, other than rhizome Liliaceae DP 3.May the classification consider about the "bulbs" which only form in the dormant period but shrink in the growing period? Begonia, if tuber, bulb, or rhizome Begoniaceae B tuber, bulb, rhizome Begonia, if fibrous rooted Begoniaceae DP fibrous roots 4.And there are several plant classification interesting and confusing to me. Alstroemeria Liliaceae DP root division Clivia Liliaceae DP Dahlia Asteraceae B tuber or tuberous roots Polianthes Agavaceae B rhizome Ranunculus Ranunculaceae DP tuberous root Sandersonia Liliaceae DP tuberous roots Su-Hong-Ciao Taiwan