Dissothrix imbricata (Gardner) Robinson 1906

Dataset
Typifications in Eupatorieae (Asteraceae): Rank
SPECIES

Classification

kingdom
Plantae: phylum
Tracheophyta: class
Magnoliopsida: order
Asterales: family
Asteraceae: genus
Dissothrix: species
Dissothrix imbricata

discussion

Gardner (1846) described Stevia imbricata based on two syntypes from Gardner collections: 1744, collected in the “ province of Ceará ”, and 2211, coming from the “ province of Piauí ”. In the herbarium of the Royal Botanic Kew Gardens (K), three specimens belonging to these collections are deposited, which are mounted on only two sheets: one sheet associated with the number 2211 (K 000054172) and another sheet containing two samples with the numbers 1744 and 2211 assigned to different specimens (K 000054173 and K 00054174, respectively). Afterwards, Gray (1851) described Dissothrix Gray (1851: 223) and a new species, Dissothrix gardneri, using the same materials cited by George Gardner to describe Stevia imbricata, citing the latter as a synonym of D. gardneri, being, therefore, a superfluous illegitimate name (according to Art. 52 of the ICN). Later, Robinson (1906) proposed a new combination, Dissothrix imbricata (Gardner) B. L. Rob.; however, did not indicate any type specimen of the basionym. Therefore, among the collections analyzed, we designate G. Gardner 2211 (K 000054172, Figure 3) as a lectotype, considering that this specimen is in good condition, with the original Gardner label, and on a sheet with a single specimen associated. The material K 000054173 (left portion of the card) constitutes an isolectotype and K 000054174 is a remaining syntype.

materials_examined

Lectotype (designated here): — BRAZIL. Província Piauí, May 1839, G. Gardner 2211 (K 000054172 [digital image!]; isolectotype K 000054173, specimen on the left [digital image!]).

Name

Synonyms: Stevia imbricata Gardner 1846
Homonyms: Dissothrix imbricata (Gardner) Robinson 1906