Juncus fascinatus (Juncaceae), a new combination in Juncus sect. Ozophyllum and
notes on morphologically similar species.
The paper can be downloaded here:
http://www.mapress.com/phytotaxa/content/2014/f/pt00174p260.pdf
ABSTRACT:
Research of the morphologic variation
within Juncus (Juncaceae) sect. Ozophyllum has revealed the need for a
new combination, Juncus fascinatus. Univariate
and multivariate statistical analyses show that J. fascinatus is morphologically distinct from J. validus. Juncus fascinatus is described, illustrated, and
compared to the superficially similar species J. paludosus, J. polycephalos, and J. validus. Juncus fascinatus is endemic to 25 counties in north-central
and southeastern Texas whereas J. validus
is more widespread and weedy. Juncus
fascinatus is distinguished from J.
validus by a united capsule apex at dehiscence, capsule length, inner and
outer tepal length, length by which the capsule exceeds the tepals, and
inflorescence length and width. Juncus
validus is ecologically distinct from J.
fascinatus and has shown a rapid range expansion throughout the
southeastern United States and into the Mid-Atlantic. Juncus validus is most likely non-native west of the Mississippi
River. The morphologically similar J.
paludosus is reported from Alabama, Georgia, Louisiana, and South Carolina for
the first time. Juncus polycephalos is reported from Kansas.
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