@article {139,
	title = {Confirmation of a hybrid Isoetes from New Jersey},
	journal = {AM.FERN J.},
	volume = {84},
	year = {1994},
	note = {Cited By (since 1996):5Export Date: 11 November 2013Source: Scopus},
	month = {1994///},
	pages = {115 - 120},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0028191624\&partnerID=40\&md5=023d53ceb2a6602cc358f568dbcb20c2},
	author = {Montgomery, J.D. and Taylor, W.C.}
}
@article {141,
	title = {Isoetes hyemalis sp. nov. (Isoetaceae): a new quillwort from the southeastern United States},
	journal = {Castanea},
	volume = {59},
	year = {1994},
	note = {Cited By (since 1996):13Export Date: 11 November 2013Source: Scopus},
	month = {1994///},
	pages = {12 - 21},
	abstract = {Isoetes hyemalis sp. nov., is described from deciduous and mixed forest swamps. Populations are known from Virginia, South Carolina, and North Carolina with the greatest number occurring in the latter. Ecological, morphological, and geographic characteristics are described and discussed. -from Authors},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0028557718\&partnerID=40\&md5=c85aca50f0892224e4c64bf446144f72},
	author = {Brunton, D.F. and Britton, D.M. and Taylor, W.C.}
}
@article {100,
	title = {The utility of nuclear ITS, a LEAFY homolog intron, and chloroplast atpB-rbcL spacer region data in phylogenetic analyses and species delimitation in Iso{\"e}tes},
	journal = {American Fern Journal},
	volume = {91},
	year = {2001},
	note = {Cited By (since 1996):46Export Date: 11 November 2013Source: Scopus},
	month = {2001///},
	pages = {166 - 177},
	abstract = {Despite its ancient origins, its worldwide distribution, and adaptation to diverse habitats, Iso{\"e}tes has a highly conserved morphology. This feature has made it difficult to resolve species and species relationships using morphological characters. In this paper, we report the utility of nucleotide sequences from the nuclear internal transcribed spacer (ITS) regions, chloroplast atpB/rbcL intergenic spacer region, and second intron of a LEAFY (LFY) homolog for identifying species relationships, delimiting basic diploid species, and determining hybrid origins. Variation in the ITS regions and atpB/rbcL spacer is most useful at the family level in Iso{\"e}tes and the LFY second intron is appropriate at the species and population level. The tree resulting from an analysis of the combined nuclear ITS and chloroplast atpB/rbcL spacer contains three major well supported clades (bootstrap >= 99\%): an Old-World/California clade (I. abyssinica, I. longissima, I. velata, I. nuttallii, and I. orcuttii), an Asian/Australian clade (I. taiwanensis, I. japonica, I. kirkii, and I. drummondii), and a poorly resolved clade consisting of nine North American species. To further resolve and delimit the North American species, a combination of the LEAFY second intron and ITS data was used. The resulting consensus tree has limited resolution, supporting the hypothesis that the North American species complex radiated rapidly. The combination of LFY and ITS data provided numerous characters, both substitutions and indels, that are useful in species delimitation and identification of cryptic species. ITS sequence data, through additive banding and sequence misalignment, is also useful in confirming interspecific hybrids and determining their parental origins.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0040332183\&partnerID=40\&md5=e97f5c223e9a884b67c6347a0db81dd5},
	author = {Hoot, S.B. and Taylor, W.C.}
}
@article {102,
	title = {Isoetes mattaponica (Isoetaceae), a new diploid quillwort from freshwater tidal marshes of Virginia},
	journal = {Novon},
	volume = {11},
	year = {2001},
	note = {Cited By (since 1996):2Export Date: 11 November 2013Source: Scopus},
	month = {2001///},
	pages = {200 - 204},
	abstract = {Isoetes mattaponica is a rare quillwort of freshwater tidal rivers of eastern Virginia with a somatic chromosome number of 2n = 22. Megaspores have low regulate muri on both the proximal and distal surfaces; the girdle is broad. Microspores are echinate-spinose with ornamented spines. Isoetes mattaponica may be one of the parents of several polyploids in the Southeastern United States.},
	keywords = {Isoetaceae, Isoetes, North America, Quillwort, United States, Virginia},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0034905622\&partnerID=40\&md5=0a918d8dca0158c2b1216f1b1f080cd0},
	author = {Musselman, L.J. and Taylor, W.C. and Bray, R.D.}
}
@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 {93,
	title = {Isoetes yunguiensis (Isoetaceae), a new basic diploid quillwort from China},
	journal = {Novon},
	volume = {12},
	year = {2002},
	note = {Cited By (since 1996):15Export Date: 11 November 2013Source: Scopus},
	month = {2002///},
	pages = {587 - 591},
	abstract = {Isoetes yunguiensis, a basic diploid species with a chromosome number of 2n = 22, is described and illustrated. This species occurs on the Yunnan-Guizhou Plateau in southwest China. It is similar to I. japonica in its appearance and emergent aquatic habit. Herbarium specimens of I. yunguiensis previously have been misidentified as I. japonica. Isoetes yunguiensis differs from I. japonica in megaspore and microspore morphology and chromosome number.},
	keywords = {China, East Asia, Isoetaceae, Isoetes, Quillwort, Yunnan-Guizhou Plateau},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036939584\&partnerID=40\&md5=da8d4d4668c03846b51b3df5877e8602},
	author = {Wang, Q.-F. and Liu, X. and Taylor, W.C. and He, Z.-R.}
}
@article {97,
	title = {Iso{\"e}tes x herb-wagneri, an interspecific hybrid of I. bolanderi x I. echinospora (Iso{\"e}taceae)},
	journal = {American Fern Journal},
	volume = {92},
	year = {2002},
	note = {Export Date: 11 November 2013Source: Scopus},
	month = {2002///},
	pages = {161 - 163},
	abstract = {Iso{\"e}tes x herb-wagneri, the interspecific hybrid between Iso{\"e}tes bolanderi and I. echinospora, is described. The epithet commemorates Warren (Herb) Wagner for the direction and help he provided to the author.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036555158\&partnerID=40\&md5=5756ed478e1a0ae4b05b7f08209f0c5d},
	author = {Taylor, W.C.}
}
@article {78,
	title = {Chromosome behavior during meiosis and development of spore mother cells in the Chinese quillwort Isoetes sinensis T. C. Palmer (Isoetaceae)},
	journal = {American Fern Journal},
	volume = {94},
	year = {2004},
	note = {Cited By (since 1996):7Export Date: 11 November 2013Source: Scopus},
	month = {2004///},
	pages = {183 - 195},
	abstract = {Chromosome behavior during meiosis of the tetraploid Isoetes sinensis was observed to be similar to that of basic diploid Isoetes species. This observation was consistent with the previous report that polyploid species of Isoetes are allopolyploids. Meiosis was generally similar in both megaspore and microspore mother cells, but differences were observed. Due to the smaller size of the microspore mother cells, during prophase I, chromosomes are not as dispersed as those in megaspore mother cells. Cytomixis was observed in all stages of meiosis in microspore mother cells, but it was not seen at any stage of meiosis in megaspore mother cells. Cytomixis, lagging chromosomes, chromosome bridges, chromosome fragments, and micronuclei, observed during meiosis in I. sinensis, can affect sexual reproduction, but it does not appear to be a major cause of population decline in this species. The major cause of decline is habitat degradation from human disturbance. The few remaining populations of the Chinese quillwort are fragmented and the numbers of individuals contained in these populations dwindle as a result of habitat degradation. Conservation efforts are needed to save I. sinensis from extinction.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-11444270683\&partnerID=40\&md5=e3b19a6dd117ccd20573e526dceb63bf},
	author = {He, Z. and Wang, H. and Li, J. and Ye, Q. and Taylor, W.C.}
}
@article {80,
	title = {Phylogenetic relationships of Iso{\"e}tes (Iso{\"e}taceae) in China as revealed by nucleotide sequences of the nuclear ribosomal ITS region and the second intron of a LEAFY homolog},
	journal = {American Fern Journal},
	volume = {94},
	year = {2004},
	note = {Cited By (since 1996):17Export Date: 11 November 2013Source: Scopus},
	month = {2004///},
	pages = {196 - 205},
	abstract = {Iso{\"e}tes is an ancient lycopod lineage with a highly conserved morphology that provides few morphological characters to resolve the phylogeny of its species. Species appear to have evolved by divergence and allopolyploidy. The basic diploids I. hypsophila, I. taiwanensis, and I. yunguiensis and the tetraploid I. sinensis occur in China. Analysis of ITS sequences indicates that the Chinese Iso{\"e}tes species are part of an Australasian clade including I. brevicula from Western Australia and I. kirkii from New Zealand. Two distinct cloned sequences of the second intron of a LEAFY homolog were recovered from I. sinensis supporting the hypothesis that I. sinensis is an allotetraploid. One of the I. sinensis cloned sequences was similar to the I. taiwanensis sequence and the other cloned sequence was similar to the I. yunguiensis sequence identifying I. taiwanensis and I. yunguiensis as the likely parents of I. sinensis. Other cloned sequences recovered from I. sinensis were recombined parts of the two distinct sequences. Morphological evidence supporting an allotetraploid origin of I. sinensis is found in its larger microspore size and intermediate megaspore texture compared to I. taiwanensis, and I. yunguiensis.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-11444262662\&partnerID=40\&md5=7b7a2b568e139bee1b60bd62836ff6ef},
	author = {Taylor, W.C. and Lekschas, A.R. and Qing, F.W. and Liu, X. and Napier, N.S. and Hoot, S.B.}
}
@article {84,
	title = {Revealing unknown or extinct lineages within Iso{\"e}tes (Iso{\"e}taceae) using DNA sequences from hybrids},
	journal = {American Journal of Botany},
	volume = {91},
	year = {2004},
	note = {Cited By (since 1996):25Export Date: 11 November 2013Source: Scopus},
	month = {2004///},
	pages = {899 - 904},
	abstract = {Iso{\"e}tes, a heterosporous lycopod with a fossil record dating back to the Paleozoic, has numerous putative allopolyploids (resulting from hybridization events coupled with doubling of chromosome number). By using the highly variable nucleotide sequences from the second intron of a LFY homologue in Iso{\"e}tes, species could be delimited and hybrid origins determined. The data suggest that reticulate evolution is both common and complex within a more derived species complex of Iso{\"e}tes. Sequences of identifiable parentage and sequences that are unlike any diploid species known were recovered, leading to the conclusion that one or both of the putative parents have not yet been discovered or are extinct. A range of observations concerning allopolyploid speciation were categorized as follows: (1) verification of previous hypotheses regarding parentage (e.g., I. riparia, I. appalachiana), (2) determination that two morphologically distinct allotetraploid species can share the same parentage (I. azorica and I. acadiensis), (3) recognition of a cryptic allotetraploid species, indicated by the presence of different parental genomes (I. "appalachiana" from Florida), and (4) identification of allotetraploid species with one or two unknown parents (e.g., I. tuckermanii, I. acadiensis, I. azorica, and I. hyemalis). Some sequences from diploid species are remarkably uniform among populations (e.g., I. echinospora from various locations in North America, Iceland, and Wales), while others are variable at the subspecies level (e.g., northern and southern populations within I. engelmannii).},
	keywords = {Allopolyploidy, Hybrid origins, Isoetes, LEAFY intron},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-11444256350\&partnerID=40\&md5=420a4ad06820ce82f60d7a70e7db9dec},
	author = {Hoot, S.B. and Napier, N.S. and Taylor, W.C.}
}
@article {87,
	title = {Relationship between Water Chemistry and the Distribution of the Endangered Aquatic Quillwort Isoetes sinensis Palmer in China},
	journal = {Journal of Freshwater Ecology},
	volume = {18},
	year = {2003},
	note = {Cited By (since 1996):6Export Date: 11 November 2013Source: Scopus},
	month = {2003///},
	pages = {361 - 367},
	abstract = {The progressive decline in populations of Isoetes sinensis Palmer in China has been attributed to deteriorating water quality; however, no data have been adduced to support this assumption. In this study we identified locations in China that presently have populations of I. sinensis and locations where the species has been extirpated. We measured various water chemistry parameters at these sites, as well as at similar sites within the distribution range of I. sinensis but from where the species has never been recorded. The results indicate that distribution and occurrence of I. sinensis are closely correlated with water chemistry. Water samples drawn from habitats from where I. sinensis has been extirpated had higher concentrations of heavy metal ions, particularly chromium VI (Cr 6+). In addition, these samples consistently yielded higher readings for dissolved carbon dioxide, water hardness, and concentration of nitrates.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0242275988\&partnerID=40\&md5=c81ad2c1833c6a70e17163c958e43e50},
	author = {Wen, M.-Z. and Pang, X.-A. and Wang, Q.-F. and Taylor, W.C.}
}
@article {73,
	title = {Isoetes orientalis (Isoetaceae), a new hexaploid quillwort from China},
	journal = {Novon},
	volume = {15},
	year = {2005},
	note = {Cited By (since 1996):9Export Date: 11 November 2013Source: Scopus},
	month = {2005///},
	pages = {164 - 167},
	abstract = {Isoetes orientalis is a previously undescribed, rare, and endangered quillwort of southeast China with a hexaploid chromosome count of 2n = 66. Megaspores of I. orientalis have a reticulate ornamentation consisting of irregularly anastomosing muri with ragged crests. Microspores have an echinate-tuberculate ornamentation. Herbarium specimens of I. orientalis previously have been misidentified as I. sinensis. Isoetes orientalis differs from I. sinensis in spore morphology and chromosome number.},
	keywords = {China, East Asia, Hoetes, Isoetaceae, Quillwort},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-18244377984\&partnerID=40\&md5=1809bda83eb743b4de93e257b51d6344},
	author = {Hong, L. and Qing-Feng, W. and Taylor, W.C.}
}
@article {74,
	title = {Confirming dioecy in Iso{\"e}tes butleri},
	journal = {American Fern Journal},
	volume = {95},
	year = {2005},
	note = {Cited By (since 1996):2Export Date: 11 November 2013Source: Scopus},
	month = {2005///},
	pages = {85 - 87},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-22444443938\&partnerID=40\&md5=bc7628e7743a43de8d2db0b4c6ad2e7a},
	author = {Turner, N.A. and Taylor, W.C. and Masi, S. and Stupen, M.E.}
}
@book {59,
	title = {Phylogeny and biogeography of Iso{\"e}tes (Iso{\"e}taceae) based on nuclear and chloroplast DNA sequence data},
	series = {Systematic Botany},
	volume = {31},
	year = {2006},
	note = {Cited By (since 1996):14Export Date: 11 November 2013Source: Scopus},
	month = {2006///},
	pages = {449 - 460},
	abstract = {Despite its ancient origins, worldwide distribution, and adaptation to diverse habitats, Iso{\"e}tes species have a highly conserved morphology, making it difficult to resolve phylogenetic relationships using morphological characters. In this paper, we report the results from various analyses (maximum parsimony, maximum likelihood, and Bayesian inference) for Iso{\"e}tes species from around the world based on nucleotide sequences from the nuclear internal transcribed spacer (ITS) and chloroplast atpB/rbcL intergenic spacer regions. The trees resulting from our analyses of the combined data contain six major well-supported clades (bootstrap >= 90\%, posterior probabilities = 1.00): A clade with possible Gondwanan affinities (I. australis, I. coromandelina, I. panamensis, I. cubana, I. jamaicensis); a South African clade (I. capensis, I. toximontana, I. stellenbossiensis, I. stephansenii); a largely Northern Hemisphere clade (I. nuttallii, I. orcuttii, I. minima, I. dixitei, I. abyssinica, I. olympica, I. longissima, I. velata); an Asian/Australasian clade (I. drummondii, I. gunnii, I. pusilla, I. kirkii, I. muelleri, I. taiwanensis, I. japonica, I. yunguiensis, I. habbemensis); a Mediterranean clade (I. histrix and I. setacea); and a poorly resolved clade consisting of 12 new world species (American species complex). Our results are compared to past classifications and various biogeographical scenarios are explored. {\textcopyright} Copyright 2006 by the American Society of Plant Taxonomists.},
	keywords = {Biogeography, Isoetaceae, Isoetes, Phylogeny},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-67650146436\&partnerID=40\&md5=c418d4b55db9dd7f2436a8d3189f1552},
	author = {Hoot, S.B. and Taylor, W.C. and Napier, N.S.}
}
@article {61,
	title = {Morphological and anatomical variation in sporophylls of Isoetes sinensis palmer (Isoetaceae), an endangered quillwort in China},
	journal = {American Fern Journal},
	volume = {96},
	year = {2006},
	note = {Cited By (since 1996):3Export Date: 11 November 2013Source: Scopus},
	month = {2006///},
	pages = {67 - 74},
	abstract = {Isoetes sinensis is a rare and endangered plant in wetlands of southeastern China. Previous studies have reported the chromosome number, geographic distribution, and ecology of this Asian endemic, but there has not been an analysis of diagnostic characters associated with the sporophylls of I. sinensis in China. Therefore, morphological and anatomical variation of sporophylls in the three known Chinese populations of I. sinensis were evaluated and compared. The variation found is discussed in relation to the present taxonomy of I. sinensis.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33845932936\&partnerID=40\&md5=dabaeae02209c3a5f4288b0f6d03a961},
	author = {Liu, H. and Wang, Q.F. and Taylor, W.C.}
}
