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Apium inundatum (L)Reichneb.fil        Lesser Marshwort


Apium : see A. gravolens.
inundatum : submerged, from inundo : flow over.

PREVIOUS NAMES : Helosciadium inundatum (L) Koch.


BSBI Picture Link to Apium inundatum
Floral Images Picture Link to Apium inundatum

TYPE: part/submerged glaborous perennial. Hyd. STEMS : slender, weak, smooth.
HEIGHT : 10-75 cm. UMBELS : compound, leaf opposed with 2(-4)
smooth rays 0.5-1 cm, unequal. Peduncles 1-3.5cm.
LEAVES : lower leaves 2-3 pinnate, segments deeply pinnatifid, lobes filiform. Upper
pinnate, lancolate to ovate, Segments 0.5-1cm, cuneate, 3 lobes, linear, sessile 5mm long.
BRACTS : bracteoles 3-6, lancolate, obtuse, unequal.
FLOWERS : white. Subsessile styles form a stylopodium. Fl. 6-8.
FRUIT : 2.5-3 mm, elliptic-oblong, laterally compressed, smooth. Commisure narrow.
Mericarps with prominent ridges. Carpophore present. Vittae solitary. Pedicels short.
Styles 1/2 as > as stylopodium, spreading. Stigma small knob. 2n=22.

HABITAT : lakes ponds, ditches.

DISTRIBUTION : native. <500m. Wide but local in Britain.
  W. Europe E. to Sicily, S.E. Sweden.
BSBI Distribution Map for Apium inundatum (UK)

HYBRID: A. x moorei (Syme) Druce : A. inundatum x A. nodiflorum.
Frequent Ire. rare England. leaves simply pinnate, obovate  lobes, umbels
with 2-3 rays. Sterile. Sparse flowers.

EXTERNAL LINKS FOR Apium inundatum

These links to trusted websites and institutions may provide in depth or additional information regards cultivation, chemistry, edibility, images etc. for the species. Links last updated Aug 2012.
Wikipedia (GER)

'Online Guide To Umbelliferae Of The British Isles' Compiled By J.M.Burton 2002