Dichanthelium Dichanthelium is genus of flowering plants of the grass family , Poaceae . They are known commonly as rosette grasses and panicgrasses .Taxonomy Formerly a subgenus of the genus Panicum , Dichanthelium was elevated to genus status in 1974. Its species are still treated as members of Panicum by some authorities , because the two genera are very similar in form. Molecular data supports the recognition of Dichanthelium as a separate genus. The name Dichanthelium originates from the Greek for "twice-flowering", in reference to the vernal and autumnal growth phases.Description These are perennial grasses, sometimes with rhizomes. The grasses may overwinter as rosettes of short, wide leaves and then produce longer, wider leaves on the stem during spring. They produce hollow stems a few centimeters tall to well over one meter . They are upright to erect when new, then sometimes sprawling, spreading, and bending as the season progresses. The upper stems may have a few main branches that divide into smaller branches bearing panicles. There are primary panicles, which may be chasmogamous , and secondary panicles, which are often cleistogamous . The spikelets are roughly 1 to 5 millimeters long and lack awns . In the Chicago area , Dichanthelium is considered the most emblematic genus of the Gulf and Atlantic coastal plain disjunct habitat found in that region .Species There are about 72 species in the genus. Species include: ssp. sericeum Dichanthelium aciculare Gould & C.A.Clark - needleleaf rosette grass, narrow-leaved panicgrassDichanthelium acuminatum Gould &C.A. Clark - tapered rosette grass , hotsprings rosette grass, hairy panicgrassDichanthelium adenorhachis ZuloagaDichanthelium aequivaginatum ZuloagaDichanthelium albomaculatum GouldDichanthelium angustifolium GouldDichanthelium annulum LeBlondDichanthelium assurgens ZuloagaDichanthelium boreale Freckmann - northern panicgrassDichanthelium boscii Gould & C.A.Clark - Bosc's panicgrassDichanthelium cabrerae ZuloagaDichanthelium caerulescens CorrellDichanthelium caparoense ZuloagaDichanthelium chamaelonche Freckmann & Lelong - small-seeded panicgrassDichanthelium clandestinum Gould - deertongue Dichanthelium columbianum FreckmannDichanthelium commonsianum FreckmannDichanthelium commutatum Gould - variable panicgrassDichanthelium congestum ZuloagaDichanthelium conjugens C.A.Clark & GouldDichanthelium cordovense DavidseDichanthelium cucaense ZuloagaDichanthelium cumbucana ZuloagaDichanthelium cynodon C.A.Clark & Gould - tussock panicgrassDichanthelium davidsei ZuloagaDichanthelium depauperatum Gould - starved panicgrassDichanthelium dichotomum Gould - cypress panicgrass, forked panicgrassDichanthelium ensifolium Gould - sword-leaf panicgrassDichanthelium forbesii C.A. Clark & GouldDichanthelium fusiforme Harvill Dichanthelium hebotes ZuloagaDichanthelium heliophilum ZuloagaDichanthelium hillebrandianum C.A.Clark & Gould - bog rosette grassDichanthelium hirstii Kartesz - Hirst's panicgrass Dichanthelium implicatum KerguélenDichanthelium isachnoides C.A.Clark & Gould - Maui rosette grassDichanthelium itatiaiae ZuloagaDichanthelium joori Mohlenbr.Dichanthelium koolauense C.A.Clark & Gould - Koolau rosette grassDichanthelium lanuginosum GouldDichanthelium latifolium Harvill - broadleaf rosette grassDichanthelium laxiflorum Gould - openflower rosette grass, soft-tufted panicgrassDichanthelium leibergii Freckmann - Leiberg's rosette grass Dichanthelium leucoblepharis Gould & C.A.ClarkDichanthelium lindheimeri GouldDichanthelium linearifolium Gould - slimleaf rosette grass, linear-leaved panicgrassDichanthelium lucidum LeBlondDichanthelium macrospermum GouldDichanthelium malacophyllum Gould - softleaf rosette grassDichanthelium mattamuskeetense Mohlenbr.Dichanthelium microcarpon Mohlenbr.Dichanthelium nitidum Mohlenbr.Dichanthelium nodatum Gould - Sarita rosette grassDichanthelium nudicaule B.F. Hansen & Wunderlin - naked-stemmed panicgrassDichanthelium oligosanthes Gould - Heller's rosette grass , fewanther obscuregrass, few-flowered panicgrassDichanthelium ovale Gould & C.A.Clark - eggleaf rosette grass, stiff-leaved panicgrassDichanthelium pantrichum DavidseDichanthelium pedicellatum Gould - cedar rosette grass, corm-based panicgrassDichanthelium peristypum ZuloagaDichanthelium perlongum Freckmann - long-stalked panicgrassDichanthelium petropolitanum ZuloagaDichanthelium polyanthes Mohlenbr. - many-flowered panicgrassDichanthelium portoricense B.F.Hansen & Wunderlin - blunt-glumed panicgrassDichanthelium pycnoclados DavidseDichanthelium ravenelii Gould - Ravenel's rosette grassDichanthelium sabulorum Gould & C.A.Clark - hemlock rosette grassDichanthelium scabriusculum Gould & C.A.Clark - woolly rosette grass, tall-swamp panicgrassDichanthelium sciurotis DavidseDichanthelium sciurotoides DavidseDichanthelium scoparioides Mohlenbr.Dichanthelium scoparium Gould - velvet panicum Dichanthelium scribnerianum GouldDichanthelium sendulskyii ZuloagaDichanthelium sphaerocarpon Gould - roundseed panicgrass, round-fruited panicgrassDichanthelium sphagnicola LeBlondDichanthelium stigmosum ZuloagaDichanthelium stipiflorum ZuloagaDichanthelium strigosum Freckmann - roughhair rosette grass, cushion-tuft panicgrassDichanthelium superatum ZuloagaDichanthelium surrectum ZuloagaDichanthelium telmatum ZuloagaDichanthelium umbonulatum DavidseDichanthelium viscidellum GouldDichanthelium wilcoxianum Freckmann - fall rosette grass, Wilcox's panicgrassDichanthelium xalapense KunthDichanthelium xanthophysum Freckmann - slender rosette grass, pale panicgrassDichanthelium yadkinense Mohlenbr.
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