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The flora of the Elizabeth Islands, Massachusetts
Iss 91, Page 119, Date 1930
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Studies in the Boraginaceae,--VIII
Iss 92, Page 1, Date 1930
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Specific segregations and identities in some floras of eastern North America and the Old World
Iss 93, Page 25, Date 1931
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The vascular flora of St. Paul Island, Nova Scotia
Iss 94, Page 105, Date 1931
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Taxonomic studies in Cuphea
Iss 95, Page 3, Date 1931
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The vascular flora of the Guano Islands of Peru
Iss 95, Page 26, Date 1931
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New American species of Trichomanes
Iss 95, Page 36, Date 1931
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Studies in the Bromeliaceae,--II
Iss 95, Page 40, Date 1931
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The group of Asplenium fragile in South America
Iss 95, Page 49, Date 1931
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New Spermatophytes from Mexico and Argentina
Iss 95, Page 53, Date 1931
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Records preliminary to a general treatment of the Eupatorieae--IX
Iss 96, Page 3, Date 1931
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The Stevias of Colombia
Iss 96, Page 28, Date 1931
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The Stevias of Venezuela
Iss 96, Page 37, Date 1931
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The Stevias of Ecuador
Iss 96, Page 43, Date 1931
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A monograph of the Genus Perezia, Section Acourtia, with a provisional key to the Section Euperezia
Iss 97, Page 1, Date 1931
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Studies in the Bromeliaceae.--III
Iss 98, Page 3, Date 1932
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Botanical evidence of Post-Pleistocene marine connection between Hudson Bay and the St. Lawrence Basin
Iss 99, Page 69, Date 1932
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Records preliminary to a general treatment of the Eupatorieae--XI
Iss 100, Page 3, Date 1932
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The Stevias of Peru
Iss 100, Page 20, Date 1932
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The Stevias of Bolivia
Iss 100, Page 36, Date 1932