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1 December 2013 A New Species of Isoetes with Tuberculate Spores from Southeastern Brazil (Isoetaceae)
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Abstract

Isoetes quiririensis is described, illustrated, and compared to similar species. This species can be distinguished from other species in Brazil by a set of characters that include microphylls that are semi-cylindrical in cross section, velum covering more than 3/4 of the sporangium, tuberculate megaspores varying from 477–670 µm in diameter, echinate microspores, and a chromosome number of 2n = 22. We also include a key for species from the Atlantic Rainforest that have tuberculate megaspores, distribution maps, and spore images for all species that are discussed. Isoetes quiriensis is known only from the type locality, where it occurs as an aquatic in small streams at high elevations. We suggest it should be classified as a data deficient species based on the IUCN criteria.

© Copyright 2013 by the American Society of Plant Taxonomists
Jovani B. S. Pereira and Paulo H. Labiak "A New Species of Isoetes with Tuberculate Spores from Southeastern Brazil (Isoetaceae)," Systematic Botany 38(4), 869-874, (1 December 2013). https://doi.org/10.1600/036364413X674742
Published: 1 December 2013
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