Jahn, R. & Schönfelder, P. 1995: Exkursionsflora für KretaMeikle, R.D. 1985: Flora of Cyprus 2Strid, A. 2016: Atlas of the Aegean flora. – Englera 33
but modified and supplemented. This key needs further testing especially as regards L. subulatum and L. rigidum resp.
1Florets turgid at maturity
1'Florets not turgid at maturity
2Upper glume of the lateral spikelets much shorter than (about half as long as) the spikelet; florets oblong or oblong-lanceolate
2'Upper glume reaching to or exceeding the tip of the spikelet or at least more than half as long; florets elliptic to ovate
3Perennial; leaf-blades folded about the midrib when young; lemmas awnless, muticous or blunt
3'Annual; leaf-blades rolled when young; lemmas awned from near the tip
4Culms slender, with 1-2 nodes; lemma awned; awn 2-3 mm long
4'Culms rather robust and rigid, with 2-4 nodes; lemma without awn
5Axis of the spike basis (0.5-)1-1.5(-2) mm thick; spikelets usually not closely appressed to the rhachis; glume not or only slightly callous; lemmas 4.5-8.5 mm long
5'Axis of the spike basis 1.5-3.5 mm thick; spikelets usually closely appressed to the rhachis; glume callous; lemmas 3.2-5.5(-7) mm long