Ischaemum Linnaeus (1753 b: 1049

Key to allied genera of Ischaemum 1. Sessile spikelets suppressed, only pedicelled spikelets developed....................................................................................................2 1. Sessile and pedicelled spikelets both are well developed (latter sometimes reduced but pedicel not curved)..................................3 2. Rhachis of the raceme inarticulate; glumes keeled, ciliate or glabrous on the back.............................................................. Dimeria 2. Rhachis of the raceme articulated (jointed and fragile); glumes rounded not keeled, with a tuft of hairs on the back................................................................................................................... Pogonachne (monotypic genus narrow endemic to Maharashtra, India) 3. Pedicelled spikelets represented by linear curved pedicel; lower glume of the sessile spikelet covered all over with transverse much raised ridges which are often broken up into teeth or wart-like papillose excrescences, not keeled............................... Thelepogon 3. Pedicelled spikelets mostly well developed, if reduced then lower glume of the sessile spikelet not as above, keeled....................4 4. Inflorescence racemiform-panicle; spikelets of each pair similar or hermaphrodite, glumes not winged; lower glume of the sessile spikelet keel-less and prominently ribbed-veins.......................................................................................................... Spodiopogon * 4. Inflorescence spiciform-raceme; spikelets of each pair dissimilar or heteromorphic (if homomorphic then glumes winged see Ischaemum).........................................................................................................................................................................................5 5. Geniculate awn present.......................................................................................................................................................................6 5. Geniculate awn absent............................................................................................. Glyphochloa (endemic to Western Ghats, India) 6. Lower glume of the sessile spikelet with a distinct median longitudinal groove...............................................................................7 6. Lower glume of the sessile spikelet convex or flat or may be somewhat depressed but never with a distinct median longitudinal groove as mentioned above.............................................................................................................................................. Ischaemum 7. Lower glume of the sessile spikelets with two vertical rows of hair; upper glume of the sessile spikelets with a tuft of hairs at or above the middle; upper glume of both the spikelets are wingless.................................................................................................................................................................................................. Triplopogon (monotypic genus narrow endemic to Maharashtra, India) 7. Lower glume of the sessile spikelets without two vertical rows of hair; upper glume of the sessile spikelets without any tuft of hairs; upper glume of both the spikelets with wing-like crest........................... Andropterum (monotypic genus endemic to Africa)Published as part of Landge, Shahid Nawaz & Shinde, Rajendra D., 2022, Ischaemum dioecum (Poaceae: Andropogoneae): the most strangest new species from Northern Western Ghats, Maharashtra, India, pp. 237-255 in Phytotaxa 533 (5) on page 239, DOI: 10.11646/phytotaxa.533.5.1, http://zenodo.org/record/614492