BULBOUS BUTTERCUP

Ranunculus bulbosus

Buttercup Family [Ranunculaceae]

month8mar month8march month8apr month8april month8may

status
statusZnative
flower
flower8yellow
morph
morph8actino
petals
petalsZ5
stem
stem8round
stem
stem8hollow
toxicity
toxicityZlowish

6th June 2015, churchyard, Aughton, Ormskirk, Lancs. Photo: © RWD
Grows to 40cm long on drier grassland, especially on lime (such as on fixed dunes near the sea).


24th May 2016, churchyard, Aughton, Ormskirk, Lancs. Photo: © RWD


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
Here with 1000's of Green-winged Orchids.


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
It is a hairy plant with branches and has long white hairs.


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
The flower stalk is grooved and also often square (as are those of Creeping Buttercup)


24th May 2016, churchyard, Aughton, Ormskirk, Lancs. Photo: © RWD
Unopened flower bud on the shorter flower stalk. Little branched. Leaves smaller and with fewer lobes higher up.


24th May 2016, churchyard, Aughton, Ormskirk, Lancs. Photo: © RWD
3-lobed leaves where the central leaf is often on a long stalk, as here.


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
With deeply-cut leaves at the junctions. Sepals hairy on outer side.


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
The leaves have three deeply-cut lobes, with the end one usually stalked, as here.


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
Sepals folding down when flower opens is a hall-mark of this species. Flower petiole (stalk) is angular, usually square.


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
Flower deep yellow throughout with 5 petals.


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
It derives its name from the bulbous stem-base, which is swollen (unlike in other Buttercup species). Here in this photo the base of the stem (centre of photo) is not so obviously swollen, since that part is out of focus.


22nd May 2015, Alt Rifle Range, Hightown, Sefton Coast. Photo: © RWD
From their starting position surrounding the flower bud (bottom flower) the 5 sepals at some point fold downwards (top-most flower), a distinctive feature of Bulbous Buttercup.


24th May 2016, churchyard, Aughton, Ormskirk, Lancs. Photo: © RWD
Stem is little-branched, but where it is branched lower down there are thin flaps around the junction.


24th May 2016, churchyard, Aughton, Ormskirk, Lancs. Photo: © RWD
The stem is hollow. Hairs semi-appressed in places


Can be mistaken for : other Buttercups but for the leaves at least some of which are deeply cut and for the swollen (bulbous) stem base just near the ground. It is one of the commoner Buttercups and is native, growing on drier grassland such as that provided by limey areas or old static dunes. Uniquely identifiable characteristics

Distinguishing Feature : See above

No relation to : Bulbous Rush (Juncus bulbosus) nor to Bulbous Meadow-grass (Poa bulbosa) [plants with similar names belonging to differing families].


  Ranunculus bulbosus  ⇐ Global Aspect ⇒ Ranunculaceae  

Distribution
 family8Buttercup family8Ranunculaceae

 BSBI maps
genus8Ranunculus
Ranunculus
(Buttercups)

BULBOUS BUTTERCUP

Ranunculus bulbosus

Buttercup Family [Ranunculaceae]