Introduced Plants of the U.S. Click on an accepted name below to view its Plant Profile with all synonyms, distribution map, more information, and web links if available.

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Symbol Scientific Name Common Name ULEU Ulex europaeus L. common gorse ULGL Ulmus glabra Huds. Wych elm ULPA Ulmus parvifolia Jacq. Chinese elm ULPR Ulmus procera Salisb. English elm ULPU Ulmus pumila L. Siberian elm UNHA Uncinia hamata (Sw.) Urban birdcatching sedge URAR2 Urochloa arrecta (Hack. ex T. Dur. & Schinz) O. Morrone & F. Zuloaga African signalgrass URBR2 Urochloa brizantha (C. Hochstetter ex A. Rich.) R. Webster palisade signalgrass URMA3 Urochloa maxima (Jacq.) R. Webster guineagrass URMO80 Urochloa mosambicensis (Hack.) Dandy African liverseed grass URMU Urochloa mutica (Forsk.) T.Q. Nguyen para grass UROL Urochloa oligobrachiata (Pilger) Kartesz, comb. nov. ined. weak signalgrass URPA Urochloa panicoides Beauv. panic liverseed grass URPI3 Urochloa piligera (F. Muell. ex Benth.) R. Webster wattle signalgrass URPL Urochloa plantaginea (Link) R. Webster plantain signalgrass URRA Urochloa ramosa (L.) Nguyen dixie signalgrass URSU2 Urochloa subquadripara (Trin.) R. Webster tropical signalgrass URVI2 Urochloa villosa (Lam.) T. Q. Nguyen hairy signalgrass URPI Urospermum picroides (L.) Scop. ex F.W. Schmidt prickly goldenfleece URBA3 Urtica ballotifolia Weddell URDI Urtica dioica L. stinging nettle‡ URDID Urtica dioica L. ssp. dioica stinging nettle URUR Urtica urens L. dwarf nettle

† Probably introduced to the U.S.

‡ Some populations in the U.S. are native and others are introduced from other countries

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