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American variations of Epilobium, section Chamaenerion
Vol 20, Page 1, Date 1918
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ON THE NAMES OF SOME SPECIES OF VIBURNUM
Vol 20, Page 11, Date 1918
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REPORTS ON THE FLORA OF THE BOSTON DISTRICT,— XXVI. ROSACEAE
Vol 20, Page 15, Date 1918
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The American Range of Botrychium lanceolatum
Vol 20, Page 19, Date 1918
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Additional Wool Waste Plants
Vol 20, Page 20, Date 1918
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NOTES ON THE CLAYTON HERBARIUM
Vol 20, Page 21, Date 1918
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SOME AMERICAN EPILOBIUMS OF THE SECTION LYSIMACHION
Vol 20, Page 29, Date 1918
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Nuttall and Pickering in the White Mountains
Vol 20, Page 39, Date 1918
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A further Note on the Lichens of Nantucket
Vol 20, Page 40, Date 1918
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HISTORY OF THE AMERICAN RECORD OF SCIRPUS MUCRONATUS
Vol 20, Page 41, Date 1918
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Notes on the Clayton Herbarium
Vol 20, Page 48, Date 1918
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REPORTS ON THE FLORA OF THE BOSTON DISTRICT,—XXVII
Vol 20, Page 55, Date 1918
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Lycopodium sabinaefolium Willd. var. sharonense (Blake) comb. nov
Vol 20, Page 60, Date 1918
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THE NORTH AMERICAN LITTORELLA
Vol 20, Page 61, Date 1918
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NOTES ON BETULA
Vol 20, Page 63, Date 1918
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NOTES ON THE CLAYTON HERBARIUM. (Continued)
Vol 20, Page 65, Date 1918
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DATES OF EATON'S FERNS OF NORTH AMERICA
Vol 20, Page 74, Date 1918
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THE VALIDITY OF OXALIS AMERICANA
Vol 20, Page 76, Date 1918
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A VARIETY OF SMILAX GLAUCA
Vol 20, Page 78, Date 1918
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Some species and varieties of Elymus in eastern North America
Vol 20, Page 81, Date 1918
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ROSA BLANDA AND ITS ALLIES OF NORTHERN MAINE AND ADJACENT CANADA
Vol 20, Page 90, Date 1918
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SOME CONNECTICUT PLANTS
Vol 20, Page 97, Date 1918
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Note on the proper Name for the Sassafras
Vol 20, Page 98, Date 1918
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A new Botanical Textbook for High Schools
Vol 20, Page 100, Date 1918
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NOTES ON THE FLORA OF NEW BRUNSWICK
Vol 20, Page 101, Date 1918
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THE DIAGNOSTIC CHARACTER OF VALLISNERIA AMERICANA
Vol 20, Page 108, Date 1918
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Josselyn Botanical Society of Maine
Vol 20, Page 110, Date 1918
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SPIRANTHES IN DOVER, MASSACHUSETTS
Vol 20, Page 111, Date 1918
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PLANTS FROM SOUTH WEYMOUTH, MASSACHUSETTS
Vol 20, Page 115, Date 1918
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Some Rhode Island Grasses
Vol 20, Page 116, Date 1918
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CHARLES EDWARD FAXON
Vol 20, Page 117, Date 1918
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SOME NEW SPECIES AND VARIETIES OF POA FROM EASTERN NORTH AMERICA
Vol 20, Page 122, Date 1918
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A NEW SPECIES OF BLADDERNUT
Vol 20, Page 127, Date 1918
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THE AMERICAN REPRESENTATIVES OF EQUISETUM SYLVATICUM
Vol 20, Page 129, Date 1918
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A PLEA FOR AUREOLARIA
Vol 20, Page 133, Date 1918
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SOME ALLIES OF RYNCHOSPORA MACROSTACHYA
Vol 20, Page 138, Date 1918
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NOTES FROM THE WOODS HOLE LABORATORY — 1917
Vol 20, Page 141, Date 1918
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THE SPECIFIC IDENTITY OF BIDENS HYPERBOREA AND B. COLPOPHILA
Vol 20, Page 146, Date 1918
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A NEW PEREZIA ADVENTIVE IN MASSACHUSETTS
Vol 20, Page 150, Date 1918
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Carex paupercula Michx., var. brevisquama, n. var., squamis 3—4 mm. longis perigynium subaequantibus. Scales 3—4 mm. long, about equalling the perigynium
Vol 20, Page 152, Date 1918
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PRESSING PLANTS WITH DOUBLE-FACED CORRUGATED PAPER BOARDS
Vol 20, Page 153, Date 1918
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THE SPECIFIC VALIDITY OF LIMOSELLA SUBULATA
Vol 20, Page 160, Date 1918
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REPORTS ON THE FLORA OF THE BOSTON DISTRICT,— XXVIII
Vol 20, Page 164, Date 1918
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Solidago racemosa Greene, forma leucantha, n. f., ligulis albescentibus, floribus disci ochroleucis. Rays whitish; disk-flowers creamy
Vol 20, Page 172, Date 1918
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ERAGROSTIS PEREGRINA A FREQUENT PLANT ABOUT PHILADELPHIA
Vol 20, Page 173, Date 1918
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PRICKLY LETTUCE
Vol 20, Page 180, Date 1918
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REPORT OF COMMITTEE ON FLORAL AREAS
Vol 20, Page 181, Date 1918
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TSUGA CANADENSIS (L.) CARR
Vol 20, Page 185, Date 1918
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A Manual of the Grasses of Illinois
Vol 20, Page 188, Date 1918
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AN INTERGENERIC HYBRID IN THE CYPERACEAE
Vol 20, Page 189, Date 1918
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FURTHER NOTES ON POTAMOGETON
Vol 20, Page 191, Date 1918
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REPORT OF COMMITTEE ON FLORAL AREAS. (Continued)
Vol 20, Page 193, Date 1918
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CARDAMINE OLIGOSPERMA AND ITS NEAR ALLIES
Vol 20, Page 197, Date 1918
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Amaranthus Powellii and Digitalis lanata in New England
Vol 20, Page 203, Date 1918
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EXOTIC PLANTS ESTABLISHED IN MIDDLESEX COUNTY, MASSACHUSETTS
Vol 20, Page 204, Date 1918
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A smooth-fruited form of Asclepias syriaca
Vol 20, Page 206, Date 1918
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REPORTS ON THE FLORA OF THE BOSTON DISTRICT,—XXIX
Vol 20, Page 208, Date 1918