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Horticulture Principles and Practices

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TABLE 1<br />

Type Categories for Plant Names. Types are based upon who is the author of the plant<br />

name <strong>and</strong> who designates the type.<br />

A. The original author or a name designates the type specimen<br />

Holotype. One specimen or illustration used by the author or designated by him<br />

as the nomenclatural type. Currently, the author must cite herbarium of<br />

deposit.<br />

Isotype. Any duplicate of the holotype; always a specimen.<br />

Paratype. One or more specimens cited by the original author but not designated<br />

as the holotype or isotype.<br />

B. The original author does not designate a type, but cites one or more voucher<br />

collections.<br />

Syntype. Any one of two or more specimens cited by the author in the<br />

protologue when no holotype was designated, or any one of two or<br />

more specimens simultaneously designated as types.<br />

C. Type specimen designated by a later author, not the original author of a name.<br />

Lectotype. A specimen or illustration selected by a subsequent author from the<br />

original material to serve as the nomenclatural type when no holotype<br />

was indicated at the time of publication of the name, or when the<br />

holotype is missing, or when holotype belongs to more than one taxon.<br />

[Most common type as historical authors didn’t designate types].<br />

Neotype A specimen or illustration selected to serve as nomenclatural type<br />

providing that all material on which the name of the taxon was based<br />

is missing.<br />

TABLE 2<br />

Plant Hierarchical Classification. Hierarchical ranks are descending. Suffixes cited are<br />

added to a genus in forming rank category name.<br />

Rank Suffix Example - Maryl<strong>and</strong> Butterfly Pea<br />

Kingdom -ae Plantae<br />

Phylum (Division) -phyta Magnoliop hyta [= angiosperms]<br />

Subphylum (Subdivision) -phytina Magnoliophytina<br />

Class -opsida Magnoliop sida [= dicots]<br />

Subclass -idae Rosidae<br />

Order -ales Fabales<br />

Suborder -ineae Fabineae<br />

Family -aceae Fabaceae [or Leguminosae]<br />

Subfamily -oideae Papilionoideae<br />

Tribe -eae Phaseoleae<br />

Subtribe -ineae Clitoriineae<br />

Genus–Intergeneric Hybrid<br />

Subgenus<br />

Section<br />

Series<br />

Clitoria<br />

Clitoria subg. Neurocarpum<br />

Clitoria sect. Neurocarpum<br />

Clitoria ser. Americana<br />

(Continued )<br />

2.2 Taxonomic Groups 41

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