ROSEROOT

Rhodiola rosea

(aka Sedum rosea)
Stonecrop Family [Crassulaceae]  

month8may month8jun month8june

flower
flower8bicolour
 
flower
flower8yellow
 
inner
inner8purple
 
morph
morph8actino
 
petals
petalsZ4
 
type
typeZclustered
 
stem
stem8round
 
smell
smell8roses
(rose)

2nd June 2010, Waberthwaite, Cumbria. Photo: © RWD
A single stalk surrounded by leaves topped by a cluster of flowers with many anthers protruding, giving it a distinctly fuzzy appearance on top.


2nd June 2010, Waberthwaite, Cumbria. Photo: © RWD
The leaves are a grey-green, glaucous. The flowers yellow.


2nd June 2010, Waberthwaite, Cumbria. Photo: © RWD
The leaves apparently spiral up the stem, with room for perhaps ten leaves radiating outwards before the spiral comes full circle. It is possible that it is a double-start or triple-start spiral, similar to some coffee jar lids.


2nd June 2010, Waberthwaite, Cumbria. Photo: © RWD
The flowers are a greenish lemon-yellow. The inner flowers in the cluster turn first reddish, then brownish before dying.


2nd June 2010, Waberthwaite, Cumbria. Photo: © RWD
The glaucous leaves are broad, mainly straight-sided, and with a few coarse teeth on the end,


2nd June 2010, Waberthwaite, Cumbria. Photo: © RWD
About ten anthers to a single flower, sometimes tipped a shade of purple.


2nd June 2010, Waberthwaite, Cumbria. Photo: © RWD
Although the book says that roseroot has four petals, many shown on this plant have five, unless these are actually sepals, and the petals are much shorter and a deeper shade of yellow much nearer the centre? Cream coloured pollen on dark-tipped anthers. Dead flowers in centre, perhaps due to lack of rain in last two months.


2nd June 2010, Waberthwaite, Cumbria. Photo: © RWD
The leaves are often tinged red on the edges. The teeth irregular.


11th July 2008, Castle Hill, Borrowdale Valley, Cumbria Photo: © RWD
The stems are a reddish to flesh colour, this specimen growing wild amidst piles of waste slate of an now disused slate quarry (but on a popular path to the summit).


Not unlike: Blinks which also has reddish flesh-coloured stems, but the leaves of Roseroot are larger and slightly toothed at the ends.

Not disimilar to: Goldilocks Aster, but that has very narrow leaves and belongs to a different family, Asteraceae.

Some similarities to: Houseleek in the way that the leaves are arranged, which is another member of the Stonecrop Family.

Uniquely identifiable characteristics

Distinguishing Feature :

No relation to : Rose

Unlike most other Stonecrops, Roseroot has but four petals, rather than the normal five, sometimes six, rarer seven, of the other stonecrops. But even in Roseroot, it is possible to find 5-petalled flowers, such is the variability of Stonescrops. Being a Stonecrop, Roseroot is a succulent.

The roots, but only when dried, smell of Roses, hence the name.

More likely to be found growing in a garden than in the wild.

GLYCOSIDIC PHENYLPROPANOIDS

The glycosidic phenyl propanoids are all constituents of Roseroot, and probably unique to Roseroot. They are all monoterpenoids. All are based losely on para-Tyrosol, apart from Rosiridin and Rosiridol which have broken phenyl rings (bottom). Indeed, p-Tyrosol is a component of Roseroot.

Rosavin and Rosaein are both double-glycosides, except that Rosarin has a terminating molecule of fructose rather than a glycoside with a six-membered ring.


Rosin (not to be confused with violin 'rosin' nor with the 'rosin' used for soldering with lead) and Salindroside are mono-glycosides, but Salindroside lacks a double bond in the aliphatic chain and gains a hydroxyl group on the terminating phenyl (far right). Salindroside (aka Rhodioloside) and alond with Rosavin is thought responsible for the anti-depressant and anxiolytic properties of Roseroot when the dried roots of Roseroot are consumed.


Rosiridin is the glycoside of Rosiridol. Rosiridin is but one of a whole series of Rhodiolosides also present in Roseroot, Radiolosides A-E, all lacking a completed phenyl ring, but having differing side branches and/or glycosides. Rosiridin is one of the most pharmacologically active constituents of Roseroot and inhibits monoamine oxidase type A and B enzymes, and therefore should benefit those suffering from depression and senile dementia (not that it has been approved for such).

Many of the above Glycosidic Phenylpropanoids are based upon p-Tyrosol, which is a phenolic anti-oxidant. It is mainly present in Olive Oil and to a lesser extent in White Wine, and has considerable health benefits especially to aging hearts. It is a derivative of Phenylethyl Alcohol, depicted below.


FLORAL COMPONENTS

More than 70 other compounds have been found in Roseroot, amongst them is Geraniol which imparts the rose-like scent, but Geranyl Formate, Geranyl Acetate, Benzyl Alcohol and Phenylethyl Alcohol; all contribute to its overall aroma.


Benzyl alcohol, a phenolic alcohol, is synthesized in many plants, and occurs in the essential ils of several including Jasmine and Hyacinth. It has a mild pleasant aroma and is used as an organic solvent for inks, paints, lacquers and epoxy resin coatings, but dissolves only sparingly in water on account of its slight polar character. If ingested in high concentrations it is toxic inducing respiratory failure, vasodilation, hypotension, convulsions and finally paralysis, but is used medically in low concentrations as a preservative in intravenous injections. Because it has a similar refractive index as that of quartz (Benzyl Alcohol ~1.53-1.55, Quartz ~1.544, depending slightly upon temperature, wavelength and, in the case of quartz, orientation), it is used as a test for quartz: quartz objects become almost invisible when submerged.

Phenylethyl Alcohol (or Phenethyl Alcohol for short) is a colourless liquid, and occurs in the essential oils of many plants including Hyacinth, Carnation and last but not least Roses. It smells of roses and is used both as a perfume and as a preservative in soap because it is stable in those alkaline conditions. It is also used as a general flavouring agent and a perfume, even in some cigarettes. It has antimicrobiotic effects.

Geraniol is an alcoholic monoterpenoid which occurs in small quantities in Geranium, Lemon, Clary Sage and many essential oils of other plants. It too has a rose-like aroma and is used in perfumes and as flavorings (together with other aromatic compounds) to imitate the flavour of Peach, Raspberry, Grapefruit, Apple, Plum, Lime, Orange, Lemon, Pineapple and Blueberry. It attracts bees yet repels mosquitos, and is used as a mosquito repellent. The scent glands of Honey bees manufacture geraniol for use as a scent marker to help them re-find their hives and nectar bearing flowers.


Geranyl Acetate is an monoterpene ester and a liquid with a slightly yellow tinge, and a rose-like smell. It is insoluble in water but solumble in some organic solvents such as alcohol. Another component of perfumes and flavourings, it is used in a variety of products such as creams and soaps, and where a rose, lavender or geranium scent is required. It occurs in the essential oils of over 60 plants including Lemon Grass, Coriander, Carrot and Geranium.

Geranyl Formate is another monoterpene ester, and like many esters has a fruity aroma.

But these are not the only compounds that come out smelling of roses! There are the so-called Rose Ketones, which are also present in Roses and some other flowers.

The extracts of Roseroot have been scientifically proven to significantly improve the physical strength and endurance of those with asthenic build, and also alleviates neurological symptoms associated with this condition. But which of the many constituents is responsible for the improvement has yet to be determined.


Distribution
 family8Stonecrop family8Crassulaceae

 BSBI maps
genus8Sedum
Sedum

ROSEROOT

Rhodiola rosea

(aka Sedum rosea)
Stonecrop Family [Crassulaceae]  

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