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Arnaldoa

Print version ISSN 1815-8242On-line version ISSN 2413-3299

Abstract

RODRIGUEZ RODRIGUEZ, Eric F et al. Notes on Bomarea bracteata (Alstroemeriaceae), an endemic species from Peru. Arnaldoa [online]. 2018, vol.25, n.2, pp.451-470. ISSN 1815-8242.  http://dx.doi.org/http://doi.org/10.22497/arnaldoa.252.25206.

The Bomarea genus proposed by Mirbel (1804) is well represented in Peru with 71 species including 22 endemisms. Also, 46 ​​species belong to the subgenus Bomarea, 9 species to the subgenus Sphaerine and 16 species to the subgenus Wichuraea. Bomarea bracteata Ruiz & Pav and is currently a member of the Dulcis group. It is an endemic species known in the past only from Ancash and Junín with scarce collections, reason why it is poorly represented in the herbaria of the world. The original description and figure (CCXCIb) proposed in Ruiz & Pavón (1802) referring to the Junín type collection ENT#091;Type: H. Ruiz & J. Pavón s.n. (MA)ENT#093;, as well as the deficiencies in the small description, the delineation and coloration, very far from reality, made by Herbert (1837), merit an extension of the taxonomic description based on the exomorphological characters and improvement of the illustration. In this sense, the objective of this work is to present the new distribution and conservation status of the species, as well as to expand the taxonomic description and improve the illustration of this endemism. The study is based on the revision of herbarium material (BC, BM, F, HAO, HUT, MA, MO, MSB, P, US and USM) and three expeditions to the Andean provinces of Julcán and Otuzco (La Libertad region) in order to make new collections, observations, photographs and evaluation of the species. The specific test was carried out with dichotomous taxonomic keys. The taxonomic description is presented considering the exomorphological and habit characteristics, delineation, examined material, geographical distribution, ecology, phenology and conservation status. The botanical material was deposited in the herbaria: F, HAO, HUT, MO and USM. Bomarea bracteata expands its geographical distribution to the north of Peru (Julcán and Otuzco, La Libertad) and in the southern part of the Amotape-Huancabamba phytogeographic zone of high endemic richness; as well as, towards Lima (Canta). The species is known in a few localities, scattered both in the north and center of Peru between 3000 and 4000 m elevation, restricted to small fragments of scrublands and existing vegetation between rocky areas; and affected in a constant way by the anthropic action; consequently, it is categorized as Vulnerable (VU, B1a).

Keywords : Bomarea bracteata; endemism; distribution; state of conservation.

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