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New taxa and nomenclatural changes in the North American fern flora
Vol 19, Page 31, Date 1993
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New species of Hawaiian pteridophytes
Vol 19, Page 63, Date 1993
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Chromosomes of North American grapeferns and moonworts (Ophioglossaceae: Botrychium)
Vol 19, Page 83, Date 1993
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Verbesina pellucida (Asteraceae Heliantheae), a new species from the Isthmus of Tehuantepec, Oaxaca, Mexico
Vol 19, Page 93, Date 1993
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Revision of Carex section Ovales (Cyperaceae) in Mexico
Vol 19, Page 97, Date 1993
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Carex tovarensis (Cyperaceae), a new species fron Venezuela
Vol 19, Page 137, Date 1993
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Taxonomic status, ecology, and distribution of Carex hyalina (Cyperaceae)
Vol 19, Page 141, Date 1993
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Infrageneric nomenclature: corrections and additions in the Caryophyllaceae
Vol 19, Page 149, Date 1993
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New species of Asteraceae Heliantheae from Latin America
Vol 19, Page 171, Date 1993
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Carex brysonii and Carex godfreyi, new species of Carex Section Griseae (Cyperaceae) from the southeastern United States
Vol 19, Page 195, Date 1993
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EUPHORBIAE NOVO-GALICIANAE REVISAE
Vol 19, Page 207, Date 1993
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THE SPECIES OF GIANT SENECIO (COMPOSITAE) AND GIANT LOBELIA (LOBELIACEAE) IN EASTERN AFRICA
Vol 19, Page 241, Date 1993
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A new species of Hornschuchia (Annonaceae) from Atlantic Brazil, with comments on the circumscription of the genus Trigynaea
Vol 19, Page 259, Date 1993
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New and reconsidered Mexican Acanthaceae. V
Vol 19, Page 271, Date 1993
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The gymnosperms of Mount Kinabalu
Vol 19, Page 307, Date 1993
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Chromosome numbers of neotropical Malpighiaceae
Vol 19, Page 341, Date 1993
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Notes on neotropical Malpighiaceae IV
Vol 19, Page 355, Date 1993
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The identities of the sericeous-leaved species of Stigmaphyllon (Malpighiaceae) in the Amazon region
Vol 19, Page 393, Date 1993
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Novelties in Stigmaphyllon (Malpighiaceae) from South America
Vol 19, Page 415, Date 1993