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Arnaldoa

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

Abstract

CRUZ CERVERA, Lázaro Santa et al. Inventory of the flora of angiosperms from Pulan District, Santa Cruz Province, Cajamarca, Peru. Arnaldoa [online]. 2019, vol.26, n.1, pp.139-212. ISSN 1815-8242.  http://dx.doi.org/10.22497/arnaldoa.261.26108.

We provide an updated inventory of the angiosperm flora of Pulan District, Santa Cruz Province, Cajamarca Department. The study area is located between 78º52’01"-79º01’30" W and 06º38´30"-06º49’48" S, and 1600 to 3200 m of elevation. Seven hundred and fifty-one species were recorded, belonging to 440 genera and 118 families of angiosperms. The taxa are located on three plant formations: seasonally dry tropical forest (SDTF), cloud dry forest of the western slopes (CDFWS), and the Jalca (J). The most diverse families are Asteraceae with 58 genera and 89 species, representing 13.18% and 11.85% of the genera and species respectively, followed by Orchidaceae (31 genera or 7.04% and 71 species or 9.45 %) and, in third place, Poaceae (31 genera or 7.04% and 52 species or 6.92%). The most diverse genera are Epidendrum, with 18 species or 2.40%, Solanum, with 13 species or 1.73% and Tillandsia, with 12 species or 1.60%. Seventy-two species were found to be endemic, being the Orchidaceae family the best represented with 10 spp. (13.89%), followed by both Asteraceae with 8 spp. (11.11 %) and Calceolariaceae with 6 spp. (8.33%). The most diverse families in the seasonally dry tropical forest (SDTF) are Orchidaceae with 21 spp., Asteraceae with 17 spp. and Bromeliaceae with 16 spp. The most diverse families in the CDFWS are Orchidaceae with 48 spp., followed by both Solanaceae with 17 spp. and Asteraceae with 16 spp. In the Jalca, the most diverse families are Asteraceae with 18 spp. and both Rubiaceae and Melastomataceae with 5 spp. each

Keywords : flora; angiosperms; endemism; Pulan; western Andean slopes; plant formations.

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