Reed Mannagrass

Foodplant / saprobe
superficial pseudothecium of Acanthophiobolus helicosporus is saprobic on dead leaf of Glyceria maxima
Remarks: season: 5-10

Plant / resting place / on
puparium of Agromyza alunulata may be found on leaf of Glyceria maxima
Other: sole host/prey

Plant / resting place / on
puparium of Agromyza lucida may be found on leaf (outside mine) of Glyceria maxima

Plant / resting place / on
puparium of Agromyza nigripes may be found on leaf (outside mine) of Glyceria maxima
Other: major host/prey

Foodplant / saprobe
apothecium of Albotricha acutipila is saprobic on dead stem of Glyceria maxima
Remarks: season: 4-8

Foodplant / saprobe
immersed, clypeate perithecium of Anthostomella caricis is saprobic on dead leaf of Glyceria maxima
Remarks: season: 3-10

In Great Britain and/or Ireland:
Foodplant / saprobe
colony of Arthrinium dematiaceous anamorph of Arthrinium phaeospermum is saprobic on dead leaf of Glyceria maxima
Remarks: season: esp. 7-8

Plant / resting place / on
larva of Baliothrips kroeli may be found on live Glyceria maxima
Remarks: season: 5-9

Foodplant / parasite
Blumeria graminis parasitises live Glyceria maxima

Foodplant / saprobe
fruitbody of Coprinopsis kubickae is saprobic on decayed leaves of Glyceria maxima

Foodplant / saprobe
fruitbody of Cristinia coprophila is saprobic on dead, decayed stem of Glyceria maxima

Foodplant / saprobe
effuse colony of Cylindrotrichum dematiaceous anamorph of Cylindrotrichum ellisii is saprobic on dead leaf of Glyceria maxima
Remarks: season: 5

Foodplant / saprobe
sessile apothecium of Dennisiodiscus prasinus is saprobic on dead, fallen, damp stem of Glyceria maxima
Remarks: season: 4-8

Foodplant / open feeder
adult of Donacia aquatica grazes on windowed leaf (upper surface) of Glyceria maxima
Remarks: season: 5-7(-10)

Plant / resting place / on
adult of Donacia impressa may be found on Glyceria maxima

Foodplant / feeds on
larva of Donacia semicuprea feeds on root of Glyceria maxima
Remarks: Other: uncertain

Foodplant / saprobe
hypophyllous fruitbody of Efibulobasidium albescens is saprobic on dead stem of Glyceria maxima

Foodplant / saprobe
fruitbody of Epithele typhae is saprobic on dead leaf base of Glyceria maxima
Other: minor host/prey

Foodplant / pathogen
Fusarium anamorph of Gibberella zeae infects and damages stem base of Glyceria maxima

Foodplant / saprobe
stalked apothecium of Hymenoscyphus scutula is saprobic on dead stem of Glyceria maxima
Remarks: season: 10-1

Foodplant / saprobe
superficial stroma of Hypocrea spinulosa is saprobic on decaying stem of Glyceria maxima
Remarks: season: 8-11

Foodplant / saprobe
short-stalked apothecium of Lachnum carneolum is saprobic on dead stem of Glyceria maxima
Remarks: season: 1-7

Foodplant / saprobe
apothecium of Lachnum carneolum var. longisporum is saprobic on dead leaf of Glyceria maxima
Remarks: season: (2-)6-8(-10)

Foodplant / saprobe
apothecium of Lachnum controversum is saprobic on dead stem of Glyceria maxima
Remarks: season: 5-10

Foodplant / saprobe
apothecium of Lachnum tenuissimum is saprobic on dead stem of Glyceria maxima
Remarks: season: 5-8

Foodplant / saprobe
scattered pseudothecium of Leptosphaeria culmifraga var. propinqua is saprobic on dead stem of Glyceria maxima
Remarks: season: 7-10

Foodplant / saprobe
fruitbody of Leucogyrophana romellii is saprobic on dead leaves of Glyceria maxima

Foodplant / saprobe
conidial anamorph of Lophodermium arundinaceum is saprobic on dead stem of Glyceria maxima
Remarks: season: 11-3+

Foodplant / saprobe
erumpent apothecium of Lophodermium gramineum is saprobic on dead leaf of Glyceria maxima

Foodplant / saprobe
fruitbody of Marasmius curreyi is saprobic on dead, decayed stem of Glyceria maxima

Foodplant / saprobe
fruitbody of Melanotus phillipsii is saprobic on dead, decayed leaf of Glyceria maxima

Foodplant / saprobe
sessile apothecium of Mollisia caricina is saprobic on dead leaf of Glyceria maxima
Remarks: season: 8-12

Foodplant / saprobe
sessile apothecium of Mollisia palustris is saprobic on dead stem of Glyceria maxima
Remarks: season: 3-9

Foodplant / saprobe
stalked, occasionally sessile sporodochium of Myrothecium dematiaceous anamorph of Myrothecium cinctum is saprobic on dead leaf of Glyceria maxima
Remarks: season: 3-5
Other: major host/prey

Foodplant / saprobe
stalked sporodochium of Myrothecium dematiaceous anamorph of Myrothecium masonii is saprobic on Glyceria maxima

Foodplant / saprobe
superficial perithecium of Niesslia exosporioides is saprobic on dry, dead leaf of Glyceria maxima
Remarks: season: 4-8

Foodplant / saprobe
apothecium of Niptera pilosa is saprobic on dead leaf of Glyceria maxima
Remarks: season: 2-9

Foodplant / feeds on
Notaris acridulus feeds on Glyceria maxima

Foodplant / internal feeder
larva of Notaris bimaculatus feeds within shoot of Glyceria maxima

Foodplant / saprobe
short-stalked apothecium of Ombrophila ambigua is saprobic on dead, rotting stem of Glyceria maxima
Remarks: season: 6-10

Foodplant / saprobe
effuse colony of Periconia dematiaceous anamorph of Periconia glyceriicola is saprobic on dead Glyceria maxima
Remarks: season: 12-4

Foodplant / saprobe
effuse colony of Periconia dematiaceous anamorph of Periconia hispidula is saprobic on dry, dead leaf of Glyceria maxima
Remarks: season: 1-12
Other: major host/prey

Foodplant / saprobe
effuse colony of Periconia dematiaceous anamorph of Periconia minutissima is saprobic on dead leaf of Glyceria maxima
Remarks: season: 1-12

Foodplant / saprobe
scattered, initially immersed pseudothecium of Phaeosphaeria eustoma is saprobic on dead stem of Glyceria maxima
Remarks: season: spring, summer

Foodplant / saprobe
scattered, initially immersed pseudothecium of Phaeosphaeria nigrans is saprobic on dead leaf of Glyceria maxima
Remarks: season: spring, summer

Foodplant / saprobe
fruitbody of Psathyrella typhae is saprobic on Glyceria maxima

Foodplant / saprobe
apothecium of Psilachnum eburneum is saprobic on dead leaf of Glyceria maxima
Remarks: season: 4-9

Foodplant / parasite
hypophyllous telium of Puccinia coronata parasitises live leaf of Glyceria maxima
Remarks: season: mid 8-

Foodplant / saprobe
stalked apothecium of Rutstroemia calopus is saprobic on dead, rotting leaf of Glyceria maxima
Remarks: season: 4-5

Foodplant / saprobe
stalked, erumpent apothecium of Rutstroemia lindaviana is saprobic on dead, very rotting, fallen, locally blackened stem of Glyceria maxima
Remarks: season: 5-9

Foodplant / saprobe
fruitbody of Subulicystidium longisporum is saprobic on dead, decayed culm of Glyceria maxima
Other: minor host/prey

Foodplant / saprobe
effuse colony of Helicosporium anamorph of Tubeufia paludosa is saprobic on dead, decaying, damp culm of Glyceria maxima
Remarks: season: esp. 6-8

Foodplant / pathogen
embedded sorus of Ustilago filiformis infects and damages live leaf of Glyceria maxima
Other: major host/prey

Foodplant / saprobe
sporodochium of Volutella anamorph of Volutella arundinis is saprobic on dead leaf of Glyceria maxima

Foodplant / saprobe
sporodochium of Volutella anamorph of Volutella melaloma is saprobic on dead leaf of Glyceria maxima

Glyceria aquatica (Linnaeus) J. Presl & C. Presl is a synonym of Catabrosa aquatica.

Perennial, rhizomatous; rhizomes long, thick. Culms stout, erect, 80–200 cm tall, up to 10 mm in diam. Leaf sheaths smooth or scabrid toward blade; leaf blades flat, light green, 25–50 cm × 8–16 mm, with transverse veinlets, abaxial surface scabrid, adaxial surface smooth or sparsely scabrid, apex acute; ligule 2–4 mm. Panicle ovate to oblong in outline, usually laxly contracted, 20–40 cm, exserted, spikelets many; branches 4–10 per node, obliquely ascending, relatively thick, scabrid. Spikelets narrowly oblong, 5–12 mm, florets 5–10, yellowish green or purple tinged; rachilla internodes smooth; glumes narrowly ovate, 1-veined, lower glume 2–3 mm, upper glume 3–4 mm, subacute; lemmas oblong, 3–4 mm, thinly herbaceous, 7-veined, veins scabrid, apex membranous, broadly obtuse; palea as long as lemma, keels wingless, scabrid. Stamens 3, anthers 1.2–1.8 mm. Fl. May–Jul. 2n = 28, 56, 60.

Marshy floodlands, stream and lake banks. Xinjiang [Kazakhstan, Russia (W Siberia westward); Europe; introduced in North America and Australia].

Molinia maxima Hartman, Handb. Skand. Fl. 56. 1820; Glyceria aquatica (Linnaeus) Wahlberg (1820), not (Linnaeus) J. Presl & C. Presl (1819); G. spectabilis Mertens & Koch; Poa aquatica Linnaeus.

Perennials, Aquatic, leaves emergent, Terrestrial, not aquatic, Rhizomes present, Rhizome elongate, creeping, stems distant, Stems nodes swollen or brittle, Stems erect or ascending, Stems geniculate, decumbent, or lax, sometimes rooting at nodes, Stems caespitose, tufted, or clustered, Stems terete, round in cross section, or polygonal, Stem internodes hollow, Stems with inflorescence less than 1 m tall, Stems with inflorescence 1-2 m tall, Stems with inflorescence 2-6 m tall, Stems, culms, or scapes exceeding basal leaves, Leaves mostly basal, below middle of stem, Leaves mostly cauline, Leaves conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostly closed, Leaf sheath smooth, glabrous, Leaf sheath and blade differentiated, Leaf blades linear, Leaf blades 2-10 mm wide, Leaf blades 1-2 cm wide, Leaf blades mostly flat, Leaf blade margins folded, involute, or conduplicate, Leaf blades mostly glabrous, Leaf blades scabrous, roughened, or wrinkled, Ligule present, Ligule an unfringed eciliate membrane, Inflorescence terminal, Inflorescence an open panicle, openly paniculate, branches spreading, Inflorescence a contracted panicle, narrowly paniculate, branches appressed or ascending, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescence a panicle with narrowly racemose or spicate branches, Inflorescence branches more than 10 to numerous, Flowers bisexual, Spikelets pedicellate, Spikelets laterally compressed, Spikelet less than 3 mm wide, Spikelets with 3-7 florets, Spikelets with 8-40 florets, Spikelets solitary at rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating above the glumes, glumes persistent, Spikelets disarticulating beneath or between the florets, Rachilla or pedicel glabrous, Glumes present, empty bracts, Glumes 2 clearly present, Glumes distinctly unequal, Glumes shorter than adjacent lemma, Glumes 1 nerved, Glumes 3 nerved, Lemma similar in texture to glumes, Lemma coriaceous, firmer or thicker in texture than the glumes, Lemma 5-7 nerved, Lemma glabrous, Lemma apex truncate, rounded, or obtuse, Lemma awnless, Lemma margins thin, lying flat, Lemma straight, Palea present, well developed, Palea membranous, hyaline, Palea longer than lemma, Palea 2 nerved or 2 keeled, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis.

Glyceria maxima (syn. G. aquatica (L.) Wahlenb.; G. spectabilis Mert. & W.D.J. Koch; Molinia maxima Hartm.; Poa aquatica L.), imfe Nd commonly known as great manna grass, reed mannagrass, reed sweet-grass, and greater sweet-grass is a species of rhizomatous perennial grasses in the mannagrass genus native to Europe and Western Siberia and growing in wet areas such as riverbanks and ponds. It is highly competitive and invasive and is often considered to be a noxious weed outside its native range.