This was posted on another forum - there is no doubt that Craig knows what he's talking about:
New Regs for Water Hyacinths
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When I visited MoBot last summer there was some discussion over the status of water hyacinth, mainly as to whether this amendment had passed.
Well, here is the abstract and sure reads to me as though Eichhoria crassipes is now banned from interstate transport:
# Title 18, Part 1, Chapter 3, Section 46- Transportation of Water Hyacinths
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http://uscode.house.gov/download/pls/18C3.txt(a) Whoever knowingly delivers or receives for transportation, or transports, in interstate commerce, alligator grass (alternanthera philoxeroides), or water chestnut plants (trapa natans) or water hyacinth plants (eichhornia crassipes) or the seeds of such grass or plants; or
(b) Whoever knowingly sells, purchases, barters, exchanges, gives, or receives any grass, plant, or seed which has been transported in violation of subsection (a); or
(c) Whoever knowingly delivers or receives for transportation, or transports, in interstate commerce, an advertisement, to sell, purchase, barter, exchange, give, or receive alligator grass or water chestnut plants or water hyacinth plants or the seeds of such grass or plants - Shall be fined under this title, or imprisoned not more than six months, or both.
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Craig
Tammie