SEA-BUCKTHORN

Hippophae Rhamnoides

Previously: Elaeagnus Rhamnoides

Sea Buckthorn Family [Elaeagnaceae]  

Flowers (before the leaves):
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Berries:
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spines

9th Sept 2009, on Ainsdale dunes, Merseyside. Photo: © RWD
Spreading into thickets amidst coniferous trees on old sand dunes by suckering.


Growing amongst beach stones and above the drift line. Photo: © RWD
26th Aug 2004, Deganwy Beach, North Wales.


21st Sept 2008, Blackleach Mineral Line, Walkden, Greater Manchester. Photo: © RWD
Growing inland, well away from the sea on a dis-used mineral line.


27th July 2007, Formby Sand Dunes, Southport. Photo: © RWD
Narrow lanceolate leaves still wet from recent rain. Berries ripening.


5th Aug 2008, on Ainsdale dunes, Merseyside. Photo: © RWD
Leaves still wet from rain.


16th Oct 2009, on Ainsdale dunes, Merseyside. Photo: © RWD
Upper surface of leaves covered in whitish pimples


21st Sept 2008, Blackleach Mineral Line, Walkden, Greater Manchester. Photo: © RWD


21st Sept 2008, Blackleach Mineral Line, Walkden, Greater Manchester. Photo: © RWD
The thorns are not very numerous.


21st Sept 2008, Blackleach Mineral Line, Walkden, Greater Manchester. Photo: © RWD
The berries a strident orange; skin pitted in almost regular intervals.


20th March 2011, Blackleach Mineral Line, Walkden, Greater Manchester. Photo: © RWD
The trunk of a mature specimen.


17th Feb 2006, Formby Sand Dunes, Southport. Photo: © RWD
Autumn and the well-faded pale yellow berries are probably by now hollow. All leaves gone.


20th April 2006, Southport, Lancs. Photo: © RWD
The flowers of a female plant.


20th April 2006, Southport, Lancs. Photo: © RWD
The petal-less greenish yellow female flowers on a female plant.


20th March 2011, Blackleach Mineral Line, Walkden, Greater Manchester. Photo: © RWD
The male flowers are orange-brown and on separate trees from the female flowers.


20th March 2011, Blackleach Mineral Line, Walkden, Greater Manchester. Photo: © RWD
Male flowers on a male plant.


23th April 2011, Southport, Lancs. Photo: © RWD
The petal-less male flowers start to burst open.


23th April 2011, Southport, Lancs. Photo: © RWD
The male flowers may have leaf buds growing from the top. Here most have burst, displaying the anthers bearing pollen within.


23th April 2011, Southport, Lancs. Photo: © RWD
Now split wide open where the pollen can be easily released.


23th April 2011, Southport, Lancs. Photo: © RWD
The orange container, being the male flower, split wide open, bearing four anthers.


23th April 2011, Southport, Lancs. Photo: © RWD
Some branches bear extremely long and sharp spines, resembling those of Blackthorn (Sloe).


Some similarities to : Pyracantha, in that both have orange berries.

Not to be confused with: Blackthorn [a shrub or tree with similar name, which produces fruits called Sloe berries].

Uniquely identifiable characteristics

Distinguishing Feature :

Sea-Buckthorn is native at seasides and stabilises the sand-dunes, but is usually planted inland where it is now becoming a problem throughout Britain, for it spreads by suckering producing thickets that prevent other plants from growing. Like most sea plants, it it salt tolerant both of salt-laden sea spray on the leaves, and salt in the ground.

The tree bears very small petal-less flowers in early spring before any leaves appear, and on last years new growth. It is diocious, with separate male and female flowers on separate trees; the male flowers being very small, bud-like, orangey-brown and clustered together. The female flowers are even smaller and much less conspicuous, and are a yellowy-green. The flower clusters often grow in the thorn or the leaf axils ('armpits').

The orange berries appear on female plants only, and are present with the leaves, which are long and narrow, slightly curved backwards, and greyish-green with pock-marks.

A yellow dye can be extracted from Sea-Buckthorn.

The berries are very high in Vitamin-C, with about a 10-fold greater concentration than that in oranges. The juice from the berries contain a multitude of nourishing compounds, but more remarkable still is that the freezing point is -22 Celsius, remaining liquid even in domestic freezers. The berries are astringent and too bitter to eat raw, but after bletting (being frozen for a few days) they can be eaten, but are better used to make jams, pies and liquors.

An oil, sea-buckthorn oil, can be obtained from the seeds. It is particularly rich in plant Phytosterols tocopherols and tocotrienols, as well as especially high levels of Carotenoids. It also contains up to 65% fats in the form of of both the mono-unsaturated fatty acid palmitolic acid and the saturated fatty acid Palmitic Acid. Sea-Buckthorn oil is used to treat radiation burns to the skin caused by over-exposure to nuclear radiation, and also as a preventative to reduce the effects of ultraviolet radiation (to which it is opaque) when astronauts are working in outer space on orbiting satellites. It is used for a variety of other skin conditions including acne, eczema, etc.

Sea Buckthorn is one of the few plants, and even fewer trees, that can fix nitrogen via symbiotic bacteria (Actinomyces) in the roots. Most of these so-called Actinorhizal plants are members of the Pea Family, the exceptions being mostly shrubs and trees from diverse other families. Over 18 families of plants can manage this feat.

ANY TEXT GOES HERE


Distribution
family8mint family8dead-nettle family8Labiatea family8Lamiaceae
BSBI maps
genus8elaeagnus family8sea buckthorn family8Elaeagnaceae
Elaeagnus

SEA-BUCKTHORN

Hippophae Rhamnoides

Previously: Elaeagnus Rhamnoides

Sea Buckthorn Family [Elaeagnaceae]