@article {101,
	title = {Systematics of the Northern Andean Iso{\"e}tes karstenii complex},
	journal = {American Fern Journal},
	volume = {91},
	year = {2001},
	note = {Cited By (since 1996):13Export Date: 11 November 2013Source: Scopus},
	month = {2001///},
	pages = {41 - 69},
	abstract = {The Iso{\"e}tes karstenii complex includes those species characterized by laevigate megaspores, acute to free ala apices, a highly reduced labium, and distributions in the high altitude p{\'a}ramos of Venezuela, Colombia, and Ecuador. These species have been variously treated in the literature. Many early authors placed all Andean laevigate-spored specimens in Iso{\"e}tes lechleri, a central Andean species, while one later author recognized up to eight northern Andean species distinct from I. lechleri. This research represents a revisionary study to determine the number and identity of the taxa in this complex. Multivariate and descriptive analyses of morphological data and chromosome counts were performed. Five species are recognized including the previously described I. karstenii and I. palmeri. One variety is transferred from I. lechleri to I. karstenii (I. karstenii var. anomala). Three of the recognized species are newly described: I. fuliginosa, I. hemivelata and I. precocia. Chromosome counts revealed that I. karstenii and I. precocia are diploids (2n = 22) and that I. palmeri is tetraploid (2n = 44). Estimates of chromosome number based on spore size for I. fuliginosa and I. hemivelata indicate that they are polyploid (2n >= 44).},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0038976036\&partnerID=40\&md5=b6f84ea9232d1f6136401b0eed965577},
	author = {Small, R.L. and Hickey, R.J.}
}
@article {89,
	title = {A re-evaluation of Isoetes savatieri franchet in Argentina and Chile},
	journal = {American Fern Journal},
	volume = {93},
	year = {2003},
	note = {Cited By (since 1996):9Export Date: 11 November 2013Source: Scopus},
	month = {2003///},
	pages = {126 - 136},
	abstract = {Isoetes suvutieri has traditionally been interpreted as being a uniform aquatic ranging from the southernmost regions of South America to the central Andes of Chile and Argentina. An examination of herbarium material supports the recognition of two taxa, a southern I. savatieri and a more northern I. chubutiana, from central Chile and Argentina. The latter taxon is hexaploid and described here as a new species. The morphology of these species suggest that they are sister species resulting from divergence following a polyploidy event. These species, and several other species pairs, provide the best and, to date, only examples of allopatric divergence in polyploid Isoetes.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0141676348\&partnerID=40\&md5=323242638fd59ed4fe04b166c7422ad8},
	author = {Hickey, R.J. and Macluf, C. and Taylor, W.C.}
}
@article {71,
	title = {Comparative morphology of the glossopodia of three North American Isoetes Ligules},
	journal = {American Fern Journal},
	volume = {95},
	year = {2005},
	note = {Cited By (since 1996):1Export Date: 11 November 2013Source: Scopus},
	month = {2005///},
	pages = {94 - 114},
	abstract = {One of the most distinctive features of the heterosporous lycopsids is the presence of a ligule. This structure, currently found only in Isoetes and Selaginella, is comprised of a basally embedded glossopodium and a free distal tongue. Previous studies on Indian species have demonstrated small variations in glossopodia suggesting the possibility that this structure could have taxanomic use. Serial cross, paradermal, and sagittal sections of glossopodia from three different North American species, representing three ploidy levels, were made. Three-dimensional digital rendering of the glossopodia provided comparative data for the three North America species and allowed comparisons with previously published descriptions. In general, the shape of the glossopodium is similar in all three North American species. There are several structural differences among them, such as the shape of the cornua, the length of the medimoles, and the angle of the glossopodium relative to the leaf axis.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-27844529330\&partnerID=40\&md5=9334fdaf0c080402ef9a0ccef97c9210},
	author = {Shaw, S.W. and Hickey, R.J.}
}
@article {55,
	title = {Isoetes araucaniana, a new species from southern South America},
	journal = {American Fern Journal},
	volume = {97},
	year = {2007},
	note = {Export Date: 11 November 2013Source: Scopus},
	month = {2007///},
	pages = {220 - 224},
	abstract = {Isoetes araucaniana is newly described from central Chile. This aquatic species is endemic to Araucan{\'\i}a and is the only southern Andean species with strongly and densely reticulate megaspores.},
	keywords = {Isoetes, New species, South America},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-39449094567\&partnerID=40\&md5=187a92568719c2772ed711b49957998d},
	author = {MacLuf, C.C. and Hickey, R.J.}
}
@article {43,
	title = {Isoetes maxima, a new species from Brazil},
	journal = {American Fern Journal},
	volume = {99},
	year = {2009},
	note = {Cited By (since 1996):1Export Date: 11 November 2013Source: Scopus},
	month = {2009///},
	pages = {194 - 199},
	abstract = {Isoetes maxima from eastern Brazil is described as a new species. This taxon differs from other fully aquatic species in South America by a combination of its overall size, leaf coloration, finely tapering subulae, and megaspore morphology. {\textcopyright} 2009, Americian Fern Society.},
	keywords = {Brazil, Isoetes maxima, New species},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-76449121955\&partnerID=40\&md5=0bb4244c3bd0be9f7105bd2c1293d6fc},
	author = {Hickey, R.J. and MacLuf, C.C. and Link-Prez, M.}
}
