Uniquely identifiable characteristics : Deep yellow flowers in the form of a spike and found in the middle and margins of peat bogs and wettish moors.

Just before the fruiting stage, the closed flower can take on a resemblance to Yellow-wort but Yellow-wort grows on sand dunes, and Bod Asphodel in wet grassland bogs. Also, Yellow-wort is yellow, whereas Bog Asphodel in this stage appears deep orange.

Bog Asphodel is not an asphodel, although it was once thought to be a miniature version of one, but rather a member of the Lily Family.

In Northern climes the it was once used a yellow hair dye and as a cheap substitute for saffron.

In July and August wet acid bogland can sometimes be strewn with carpets of a deep orange yellow to be replaced later in September by a carpet of orange and russet-brown as the flowers fruit.

Bog Asphodel is poisonous to both sheep and cattle, causing serious kidney problems and a photosensitive disorder (variously called 'alveld' in Norway; 'plochteach' 'yellowses' and 'head greet' in Scotland, and 'saut' in Cumbria) caused by saponins (narthecin being the major one, xylosin a minor one, not shown) that crystallize in the bile ducts blocking them, resulting in the accumulation of phylloerythrin (a porphyrin) that the bile ducts were attempting to discard. The photosensitization is caused by the phylloerythrin which now permeates the blood plasma. Where the blood approaches the surface, in the skin, the phylloerythrin is exposed to sunlight, where it is photo-energized into an excited state initiating various chemical reactions in the skin, resulting in tissue damage. It is often fatal. These same saponins (still not shown) have haemolytic and cytotoxic properties causing hepatitis, oedema and severe poisoning (usually in sheep). The two saponins are spirostanols saponins, derived by hydrolysis from furostanols which is the form in which the saponins exist in the plant. The phylloerythrin itself was sythesized in the animal after eating green plants containing chlorophyll (another porphyrin). The chlorophyll is normally broken down in the animals gastro-intestinal tract by microbes into phylloerythrin, where it is excreted by the liver into the bile. But if the bile ducts are blocked...

Bog Asphodel contains Nartheside A and Nartheside B, which are rather inert glucosides, but they are converted into reactive aglycones, narthogenins, which have similar chemical properties to those of Protoanemonin and Tulipalin A. [The author cannot find the structural formulae for these Saponins, Narthesides nor Narthogenins].

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