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  • Bibliographical index to North American botany, pt. I Polypetalae (Sereno Watson).  Washington: Smithsonian Institution, 1878 (Z5358.N86 W3 1878). Citations, references and chronological synonymy for native and naturalized plants in North America.
  • Guide to the plant species descriptions published in seed lists from botanic gardens for the period  1800 – 1900 [Nationaal Herbarium Nederland]
  • Index Kewensis (IK), later Kew Index [Oxford: Clarendon, 1895- (QK11 .I42 Reference)] is maintained by the Royal Botanic Gardens, Kew.  Its aim was to register all formal botanical names for seed plants at the rank of species and genus. Later, it also started to include names of families and of taxa below the rank of species. It was started in 1895, with regular supplements issued on newly published names. A digitalized version of the IK has been integrated in IPNI, so that it can be consulted online: its entries are recognizable by the letters “(IK)”.
  • Index nominum genericorum (ING) (QK97 .R4) is compilation of generic names published for organisms covered by the International code of botanical nomenclature.
  • Index nominum supragenericorum plantarum vascularium The purpose of the project is to capture all valid and legitimate extant vascular plants names, as defined by the International code of botanical nomenclature, proposed above the rank of genus.
  • Integrated taxonomic information system (ITIS)
  • International Organization of Plant Information includes:
    • Database of plant databases is a global list of plant databases, to tell you who is putting together what data and where. The DPD contains virtually no plant data as such, but serves to put you in contact with the projects that do. Most, but not all, entries concern databases about higher plants. Roughly speaking, there are three kinds of databases:
      • Taxonomic databases, with systematic information on families or genera, or for Flora projects.
      • Collection catalogues, usually of herbaria.
      • DELTA datasets. DELTA is the Description Language for Taxonomy, a data format for character data, used for identification, key construction and the generation of descriptions.
    • Global plant checklist project encompasses about 300,000 vascular plant species and over 1,000,000 names. Eventually, the Checklist will also include non-vascular plants (mosses, lichens, algae, and liverworts).
    • Species plantarum project is a longer term project aiming to record essential taxonomic information on vascular plants on a world basis. It may be likened to a world flora. It is expected that it will include accepted names and synonyms with places of publication and types, short descriptions of all taxa from family to infraspecific rank, keys, distributions, references to literature comments, etc.
  • International plant names index (IPNI) is a database of the names and associated basic bibliographical details of seed plants, ferns and fern allies. Its goal is to eliminate the need for repeated reference to primary sources for basic bibliographic information about plant names.  Look for the author of a combination, find the paper, often one or more taxa and keys and references to other species and keys.  Author of a new name usually gives references to earlier literature.
  • Plants database (USDA) provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories.
  • Plants identification keys (USDA)  U.S. plants
  • Proposals and disposals (conserved and rejected plant names) is an index to the names proposed for conservation or rejection, now published in Taxon, since the first proposals in 1892. The record for each name provides the citation for the relevant publications and indicates the final disposition of the proposal.
  • Taxonomy of vascular plants (George H.M. Lawrence).  N.Y., Macmillan, 1951 (QK93 .L38 1951). Keys to orders of vascular plants; descriptions and literature on most plant families, Engler and Prantl refs., Chapter 14: Literature of taxonomic botany. Herbarium practices, regional floras, bibliographies, etc.
  • World checklist of selected plant families (Kew) gives information on the accepted scientific names and synonyms of selected plant families. It allows you to search for all the scientific names of a particular plant, or the areas of the world in which it grows (distribution).
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