Über die karotinoiden Farbstoffe der höheren Pflanzen.

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Abstract
Suspended strips of filter paper were allowed to dip into alcohol and ether extracts of comminuted fresh fruits and flowers of various sp., the ether extracts first being diluted with alcohol. By capillary action color charts of carotinoid pigments are thus obtained on the paper, consisting of 1 or more red, orange, or yellow bands. The uppermost band is formed by the most easily soluble pigment. Ripe fruits of Lycopersicum esculentum, Solarium balbisii, S. dulcamara, Arum italicum, Rosa canina, and roots of Brassica napus contain lycopin and arumin, the latter possibly being an oxide of the former. The fruits of Sorbus aucwparia, S. suecica, and Rosa canina contain sorbusin. In the calyx and fruit of Physails alkekengi and in fruit of Lycium carolinianum and Solatium pseudocapsicum, physalin is found. Phyllorhodin or related pigment also occurs in fruits of L. carolinianum and S. pseudocapsicum and in arils of Euonymus europaea. Ripe fruits of Capsicum annuum apparently contain capsumin in 3 modifications. Arils of Taxus baccata owe their red color to taxorhodin. Xanthophyll and carotin seem to play only a minor role in the fruits examined. In Calendula officinalis the color of the blossoms is due to a new carotinoid designated as calendulin, in Tropaeolum majus and Tagetes patula to sor-busin-like pigments, in Calceolaria scabiosifolia to xanthophyll, and in Aloe vera to rhodoxanthin. Roots of Daucus carota contain phylloxanthin, in addition to carotin and xanthophyll.

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