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Inflorescences

Dissections:
Lolium perenne

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LOLIUM L. Ryegrass
Plants hermaphroditic, caespitose, annual. Culms erect or ascending or decumbent, glabrous; internodes hollow, terete. Leaves cauline; sheaths terete, margins open; auricles present (membranous); ligules membranous; blades flat or folded (narrow). Spikes with rachis persistent. Spikelets solitary, laterally compressed; disarticulation above glumes, awned or awnless, sessile; florets 5-9, reduced floret at apex; callus glabrous; rachilla not extending above upper floret; glumes 1; the first absent on all but the terminal spikelet, second glumes 3-7-veined (round on back), shorter than first floret or longer than spikelet, glabrous, awnless; lemmas 5-7-veined, membranous to chartaceous, glabrous or scabrous, apex obtuse to acute, awned to awnless, awns (1)apical (straight); paleas 2-veined, awnless, glabrous or scabrous, veins short ciliate. Stamens 3; anthers yellow. Caryopses slightly adnate to lemma and palea, dorsiventrally compressed. Base chromosome number x=7.

A temperate genus of about eight species from Eurasia and northern Africa. The species are important for livestock forage, lawns, and as weeds.