In plant taxonomy, Principes is a botanical name, meaning "the first". It was used in the Engler system for an order in the Monocotyledones and later in the Kubitzki system. This order included one family only, the Palmae (alternate name Arecaceae). As the rules for botanical nomenclature provide for the use of such descriptive botanical names above the rank of family it is quite allowed to use this name even today, but in practice most systems prefer the name Arecales. Plant taxonomy is the science that finds, describes, classifies and names plants. ... A botanical name is a formal name conforming to the ICBN. As with its zoological and bacterial equivalents it may also be called a scientific name. Botanical names may be in one part (genus and above), two parts (species) or three parts (below the rank of species). ... One of the prime systems of plant taxonomy, the Engler system was devised by Adolf Engler. ... It has been suggested that this article or section be merged into Monocotyledon. ... A system of plant taxonomy, the Kubitzki system was published in Kubitzki, K. et al. ... Genera Many; see list of Arecaceae genera Arecaceae (also known as Palmae or Palmaceae), the palm family, is a family of flowering plants, belonging to the monocot order Arecales. ... Genera Many; see list of Arecaceae genera Arecaceae (sometimes known by the names Palmae or Palmaceae, although the latter name is taxonomically invalid. ... The International Code of Botanical Nomenclature is the set of rules according to which plants are given their formal botanical names (scientific names). ... Botanical nomenclature Plants are given formal names, governed by the ICBN. Within the limits set by the ICBN there is a separate set of rules, the ICNCP, for those plants in cultivation that require separate recognition, so-called cultivars. ... Descriptive botanical names: Art 16 of the ICBN rules that names above the rank of family may be either descriptive or based on the name of an included genus. ... This list of systems of plant taxonomy presents “taxonomic systems” used in plant classification. ... Family Arecaceae Arecales is the botanical order which includes only the palm family, Arecaceae. ...

Following this, Principes has been the name of the journal of the International Palm Society, but the journal title became Palms in 1999.