Palicourea roseocalycina Torres-Leite

Torres-Leite, Filipe, Carmo, João Afonso Martins Do, Bruniera, Carla Poleselli, Carrijo, Tatiana Tavares & Goldenberg, Renato, 2024, Lectotypification and a new name in Palicourea for the Brazilian Psychotria dusenii Standl. (Rubiaceae), with remarks on morphology and taxonomy, Phytotaxa 642 (4), pp. 273-278 : 274-275

Palicourea roseocalycina Torres-Leite , nom. nov.

≡ Psychotria dusenii Standley (1931: 378) , Publ. Field Columb. Mus., Bot. Ser. 8, nom. illeg., non Psychotria dusenii Schumann (1903: 364), Bot. Jahrb. Syst. 33(2).

Psychotria alegre Govaerts , nom. nud.

Lectotype (designated here): — BRAZIL. Paraná: Serra do Mar , Monte Alegre , 25º20'43"S, 48º56'13"W, elev. 1000 m, 08 February 1904, Dusén 3497 ( S-S05-1071 [image]!), first sheet. Isolectotypes: —ibidem (F-barcode V0070386F [image]!; S-S16-20707 [image]!).

Paratypes: — BRAZIL. Paraná:, Serra do Mar , Marumbý , elev. 900m, 13 February 1904, Dusén 3701 ( S16-20709 ). BRAZIL. Paraná: Caiguava , elev. 1000 m, 11 September 1909, Dusén 8965 ( S16-20708 [image]!) .

Nomenclatural remarks:— The type specimen of Psychotria dusenii Standl. was cited in the protologue as “ Brazil (State Paraná): Serra do Mar, Monte Alegre, alt. 1000 m. February 8, 1904, P. Dusén 3497 (Stockholm. Herb., type)”. However, more than one specimen of this collection, with different accession numbers, is deposited in S. There is also a fragment of this material deposited as a duplicate in F (catalogue number 614828, barcode V0070386F). Here, the sheet numbered S05-1071 is designated as lectotype of the name Palicourea roseocalycina ( Fig. 1 ), and the collections S16-20707 (S) and V0070386F (F) are designated as isolectotypes.

There is a second sheet attached to Dusén 3497 ( S 05-1071 ) containing handmade drawings associated with the specimen. However , one of the three illustrations is attributed to another specimen from the same collector ( Dusén 3701; illustration to the left below), as mentioned in the protologue. We do not consider these drawings as original material nor as a type. In addition to the lectotype and isolectotypes, we also analyzed the paratypes ( S 16-20708 , S 16- 20709 ), which were cited in the protologue.

Morphological remarks:— Palicourea roseocalycina ( Fig. 2 ) is characterized by slender branches, pink inflorescences and flowers, persistent tubular calyx, blue drupes, and also bifid stipules becoming truncated on mature branches. Due to these characteristics, this species belongs to Psychotria subgenus Heteropsychotria and Psychotria section Solenocalyx Müller Argoviensis (1889: 266–269) , which includes Psychotria glaziovii Müller Argoviensis (1889: 267) , Psychotria fluminensis Vellozo (1825: 30) , Psychotria megalocalyx Müller Argoviensis (1889: 268) , and Psychotria ulei Standley (1936: 252–253) . All species in Psychotria subgenus Heteropsychotria have yet to be formally transferred to Palicourea . Palicourea roseocalycina differs from these species due to the color and shape of the inflorescences, which are pink, tri-flowered simple or compound dichasia, whereas P. megalocalyx presents white flowers arranged in capituliform inflorescences, and P. glaziovii , P. fluminensis , and P. ulei present white flowers arranged in lax pauciflorous inflorescences.

Distribution:— Palicourea roseocalycina is endemic to the Atlantic Forest of Brazil, occurring at ca. 1000 m, in the states of Minas Gerais, São Paulo, Paraná, and Santa Catarina.

Additional material:— BRAZIL. Minas Gerais: Camanducaia, Monte Verde, Floresta Ombrófila Densa Alto-Montana, 30 June 2001, Meireles 414 (UEC038854). Paraná: Piraquara, próximo ao topo da trilha do Morro do Canal, 10 December 2018, Torres-Leite, Reginato e Bacci 668 (UEC, to be deposited). São Paulo: Campos do Jordão, estrada antiga de Campos do Jordão a Santo Antônio dos Pinhais, 11 June 1992, Galvão et al. 26441 (UEC115549).

Figures

FIGURE 1. Lectotype (Dusén 3497, S05-1071) of Palicourea roseocalycina.

FIGURE 2. Palicourea roseocalycina. A. Flowers. B. Inflorescence. C. Fruits. D. Habitat of the species, Morro do Canal, municipality of Piraquara, state of Paraná, Brazil. (Photos by A–C, M. Ogrzewalska; D, F. Torres-Leite).