Oenanthe fistulosa L. Tubular Water-Dropwort
NOMENCLATURE
Oenanthe: see 0. crocota.
fistulosa: pipe like, tubular. Dropwort : see 0. aquatica.
BSBI Picture Link to Oenanthe fistulosa
BOTANICAL DESCRIPTION
TYPE: glabrous, stoloniferous perennial. Hel or Hs.
ROOTS: tuberous, fusifrom. Lower nodes rooting.
STEMS : 0.5cm diam, fistular, constricted at nodes, striate, slender. HEIGHT : 30-80cm.
UMBELS : compound. 2-4 rays, 1-3cm, stout, spreading, thickening after flrng. Peduncle >
than rays. Terminal hermaphrodite, some male. Lateral all male. Partial umbels 1cm
diam., dense, flat topped in flr., globose in fruit, pedicels thicken after flring.
LEAVES : 1-3 pinnate, oblong to lanceolate outline. Basal leaves 2-pinnate, submerged, soon
withering. Segments shortly stalked, lanceolate, lobed. Cauline 1-pinnate, entire lobes 0.5-2cm,
linear-lanceolate or subulate, distant. Petioles of cauline fistular, > than blade. Cotyledons
contratced into a petiole. BRACTEOLES : 7-16 linear, < than pedicels.
FLOWERS : white or pink. Sepals acute, persistent. Outer petals radiating,
unequal. Styles form a stylopodium. Fl. 7-9.
FRUIT : 3-4mm. obconical to cylindrical. Commisure broad. mericarps with inflated corky
ridges. Carpophore present. Vittae solitary. Styles > as fruit, erect slender, diverging.
Stigma a small knob. 2n=22*
HABITAT : marshy places and shallow water.
DISTRIBUTION : native. E. England. Local in Scotland & Wales,
E. Ireland. Rare in W. Europe. W.Asia. N.W. Africa.
BSBI Distribution Map for Oenanthe fistulosa (UK)
POISONING PRINCIPLES : see 0. aquaticum. Contains oenathin.
EXTERNAL LINKS FOR Oenanthe fistulosa
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.
Bio Info (UK) National Center for Biotechnology Info (USA)
BIO Images (UK) Plant Collection Network (UK)
'Online Guide To Umbelliferae Of The British Isles' Compiled By J.M.Burton 2002
