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Bulletin - United States National Museum - Smithsonian Institution

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184 FLOEA OF WASHINGTON AND VICINITY.<br />

i348. Quercus Leana, Nutt.<br />

:B49. Quercus heterophylla, Michx.<br />

S50. Castanea pumila, Mill.<br />

:S51. Castanea vulgaris, Lam., var. Americana, A. DC.<br />

852. Pagus femiginea, Ait.<br />

353. Saliz nigra, Marshall.<br />

354. Salix nigra, Marshall, var. falcata, Carey.<br />

355. Salix nigra, Marshall, var. Wardi, Bebb.<br />

356. Salix fragilis x alba, Wimmer.<br />

557, Salix alba, L.<br />

558. Salix alba, L., var. vitelUna, Koch.<br />

859. Salix Babylonica, L.<br />

860. Salix longifolia, Muhl.<br />

861. Salix humilis, Marshall.<br />

862. Salix tristis, Ait.<br />

863. Salix sericea, Marshall.<br />

364. Salix cordata, Muhl.<br />

365. Salix cordata x sericea, Bebb.<br />

366. Salix p«rj>Hrea, L.<br />

367. Populus grandidentata, Michx.<br />

368. Populus monilifera, Ait.<br />

369. Populus balsamifera, L., var. candicans, Gray.<br />

370. Populus dilatata, Ait.

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