PEDICELS ABSENT (no stalk below each spikelet)
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Inflorescence in form of a SPIKE
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Groups 1 - 2
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Either:-
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Group 1
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Single terminal spike, with spikelets having little or no stalk
See all species in Group
1
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37 species in our area: Cynosurus, Hordeum, Hordelymus,
Gaudinia, Psilurus, Nardus, Mibora, Brachypodium, Vulpia,
Micropyrum, Lolium, Elytrigia, Aegilops (Triticum),
Elymus
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or:-
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Group 2
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2 or more spikes from main axis: with spikelets having little or
no stalk
See all species in Group
2
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4 species in our area: Echinochloa, Digitaria, Cynodon, Bothriochloa
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PEDICELS PRESENT (stalk below each spikelet) (groups 4 - 9)
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Inflorescence in form of a PANICLE
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Either:-
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Group 3
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Compact panicle forming a single spike: cylindrical, oval or
spherical
The pedicel (stalk under each spikelet) is not initially easy
to see
See all species in Group
3
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27 species in our area: Echinaria, Phalaris, (Cynosurus—see
group 1), Tragus, Setaria, Sesleria, Rostraria, Koeleria, Dactylis,
Anthoxsanthum, Polypogon, Gastridium, Phleum, Alopecurus,
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or:-
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Groups 4-9
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Loose open panicle. May be tighter, more spike-like, at
some stage of flowering or seeding
2 options below
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The large majority of grasses in the Cévennes
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Either:-
(Groups 4-9)
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Groups 4 - 5
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Spreading panicle
only one fertile flower per spikelet (may also posess some
infertile flowers)
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Needs careful dissection of spikelet to view fertile and infertile
florets
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or:-
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Groups 6 - 9
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Spreading panicle
several fertile flowers per spikelet
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Loose open panicle. Only one fertile flower per spikelet
(may also posess some infertile flowers)
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Groups 4 - 5
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Either:-
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Group 4a
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Loose panicle, fertile spikelets mixed with sterile or male
spikelets: Terminal axes articulated and fragile at maturity
No follow-on; single species in group
Sorghum halepense
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Single species in our area: Sorghum halepense
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or:-
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Group 4
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Loose panicle, one fertile (hermaphrodite) floret, other
florets sterile or male i.e. 3+ glumelles (sometimes reduced to
scales):
See all species in Group
4
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10 species in our area: Arrhenatherum, Panicum, Melica,
Holcus,
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or:-
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Group 5
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Loose panicle, one fertile (hermaphrodite) floret no other
sterile i.e only 1-2 glumelles developed
See all species in Group
5
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16 species in our area: Stipa, Calamagrostis, Agrostis,
Piptatherum (incl. Oloptum), Achnatherum, Sporobolus, Milium
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Pedicels present, forming a loose panicle, 2+ fertile
(hermaphrodite) florets
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Groups 6 - 9
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Either:-
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Group 6a
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Loose panicle, 2+ fertile (hermaphrodite) florets, each
surrounded by long white hairs, giving a silky panicle:
No follow-on; single species in group
Phragmites australis
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Single species in our area: Phragmites australis
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or:-
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Group 6
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Loose panicle, 2+ (fertile) hermaphrodite florets, hairy ligule:
spikelets almost always without awns:
See all species in Group
6
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11 species in our area Danthonia, Eragrostis, Molinia,
Kengia
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or:-
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Groups 7-9
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Loose panicle, 2+ fertile (hermaphrodite) florets, membranous
ligule,
Continue to see all species in Group 7-9
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Ligule, if present, is membranous, with no hairs
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Ignore hairs on the leaf or leaf-sheath
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Loose panicle, 2+ fertile (hermaphrodite) florets, membranous
ligule
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Groups 7 - 9
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Either:-
(Groups 7-9)
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Group 7
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Loose panicle, 2+ fertile (hermaphrodite) florets, membranous
ligule, dorsal awn. Very long glumes
See all species in Group
7
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16 species in our area Avena, Helictochloa (=Avenula), Avenula,
Corynephorus, Aira, Deschampsia, Trisetum
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or:-
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Group 8
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Loose panicle, 2+ fertile (hermaphrodite) florets, membranous
ligule, awn terminal/sub-terminal/absent; very long glumes
No species in Group 8 in our area
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Small group; just 3 species in southern France, none in our
area
Includes some from Melica (see group 4), Avellinia, Airopsis
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or:-
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Group 9
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Loose panicle, 2+ fertile (hermaphrodite) florets, membranous
ligule, absent or terminal/sub-terminal awn; short glumes:
See all species in Group
9
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53 species in our area Dactylis, Briza, Bromus
(incl. Bromopsis, Ceratochloa et Anisthanta) , (Vulpia –see group
I), Festuca (incl. Patzkia), Glyceria,
Poa, Catapodium, Schedonorus
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