sphenopsid


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sphenopsid

(sfɪˈnɒpsɪd)
n
(Plants) a type of rush
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
While engaged in the taxonomic revision of upper Namurian to middle Westphalian floras of the Maritime Provinces of Canada, it became apparent that certain forms of the sphenopsid fossil-genera Annularia and Asterophyllites needed special attention in a broader context.
This led to a worldwide change from hydric conditions to mesic conditions which are less favorable to sphenopsid growth.
Similarly there is little disagreement that the sphenopsid leaf is derived from a branch system, with the difference that the number of telomes entering into the composition of such a leaf is smaller than in the case of the macrophyllous leaf.
By far the most abundant macrofloral impressions are sphenopsid stems (Calamites cistii and less commonly Calamites suckowii), which occur throughout the section as prostrate axes in channel lag deposits, and less commonly in growth position.
Botanical affinities of isolated palynomorphs included in this paper indicate the presence of sphenopsids (Equisetopsids) and ferns (Osmundaceae) during the early Permian period along with gymnosperms (Cycadales, Benniettitales).
Also present are the sphenopsids Trizygia speciosa, Phyllotheca australis and Benlightfootia sp.