1. Glume 1/4-3/4 spikelet length 2
Glume ±equal to spikelet length 3

2. Lemmas distinctly awned *L. multiflorum (NSW VIC TAS SA WA QLD)
Lemmas unawned or very rarely awned *L. perenne (NSW VIC TAS NT SA WA QLD)
L. perenne var. cristatum

3. Florets turgid at maturity 4
Florets not turgid at maturity 5

4. Lemmas awnless *L. temulentum f. arvense (NSW VIC TAS SA WA QLD)
L. arvense
Lemmas awned *L. temulentum f. temulentum (NSW VIC SA WA QLD)

5. Rachis thick and rigid; glume subequal to spikelet *L. loliaceum (NSW VIC TAS SA
L. rigidum subsp. lepturoides, L. subulatum
Rachis thin and flexuose; glume slightly shorter than spikelet *L. rigidum (NSW VIC TAS NT SA WA QLD)

Key to Lolium derived from Willis 1970; Kloot 1983

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith