@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.}
}
@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.}
}
