Oenanthe silaifolia (Bieb).
Narrow Leaved Water-Dropwort
NOMENCLATURE
Oenanthe: see 0. crocota.
Dropwort: see 0. aquatica.
Floral Images Picture Link To Oenanthe silaifolia (UK)
BOTANICAL DESCRIPTION
TYPE : glabrous perennial. Hs.
ROOTS: obovoid or fusiform tubers, tapers towards the junction
with the stem. STEMS: solid base, hollow above. Grooved & striate.
UMBELS: compound. 4-10 rays, smooth 15-30 mm, thickening after flring. Peduncle >
than rays. Terminal with long pedicellate male & shortly pedicellate hermaphrodite flrs.
Lateral all male. Partial umbels : pedicels thicken after flring.
LEAVES: lower 2-4 pinnate, long petiolate, soon withering, lobes 10-30mm. linear to linear-
lanceolate. Upper 1-2 pinnate, linear-lanceolate lobes. Petiole < than blade. Cotyledons
contracted into a petiole. BRACTS: 0. Bracteoles : 10-17, lanceolate, acute.
FLOWERS : white. Sepals acute, persistent. Outer petals radiating.
Styles form a stylopodium. Fl. 5-6.
FRUIT: 3-3.5 cm. Subcylindrical. Commisure broad. Mericarps with prominent ridges;
Carpophore present. Vittae solitary. Styles < than fruit, erect to divergent. Constricted at
junction with pedicel. Stigma tapering. 2n=22*.
HABITAT: wet, rich meadows, near rivers.
DISTRIBUTION: local, decreasing. S. & E. of a line from Severn to the Wash. Two
sites in Worc. & Notting. W.,C. & S. Europe. S.E. Asia, N.W. Africa.
BSBI Distribution Map for Oenanthe silaifolia (UK)
POISONING PRINCIPLES: see 0. aquatica.
'Online Guide To Umbelliferae Of The British Isles' Compiled By J.M.Burton 2002