Hematochrome - AbsoluteAstronomy.com

Hematochrome is a yellow, orange, or (most commonly) red biological pigment

Biological pigment

Biological pigments, also known simply as pigments or biochromes are substances produced by living organisms that have a color resulting from selective color absorption. Biological pigments include plant pigments and flower pigments...

present in some green algae

Green algae

The green algae are the large group of algae from which the embryophytes emerged. As such, they form a paraphyletic group, although the group including both green algae and embryophytes is monophyletic...

, especially when those are exposed to intense light. It is a name used mainly in older literature. Hematochrome is a mixture of carotenoid

Carotenoid

Carotenoids are tetraterpenoid organic pigments that are naturally occurring in the chloroplasts and chromoplasts of plants and some other photosynthetic organisms like algae, some bacteria, and some types of fungus. Carotenoids can be synthesized fats and other basic organic metabolic building...

pigments

Biological pigment

and their derivates. http://www.salinesystems.org/content/1/1/2 http://books.google.com/books?id=JbTg1QkFycgC&pg=PA172&lpg=PA172&dq=hematochrome+carotenoid&source=bl&ots=QYoq3OY_hU&sig=69r5rq_g9Mp2eq_Lko2mmYw20JY&hl=en&sa=X&oi=book_result&resnum=10&ct=result http://www.adap.hawaii.edu/adap/ASCC_LandGrant/Dr_Brooks/TechRepNo39.pdf

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