a-CAROTENE 



151 



Coprosma haueri Endlicher; Daucus Carota L., Petroselinum hortense, Hedera 

 helix L., Quercus agrifolia, Aesculus calif ornica Nuttall; Parthenocissus quinque- 

 folia, Amsinckia douglasiana De Candolle, Cuscuta salina Engelman, Solanum 

 tuberosum, Lycopersicum esculentem Miller, Citrus maxima, Malva parviflora L., 

 Urtica urens L., Ficus carica L., Thea sp.. Camellia sp., Sedum acre L., Dracaena 

 draco L., Washingtonia filijera Wendland; Pinus radiata Don; Libocedrus de- 

 currens Torrey; Moss sp., Chlorella vulgaris, Ranunculus californicus Bentham, 

 Magnolia grandiflora L., Phoenix, Sequoia sempervirens Engelmann. 



Further information regarding the occurrence of a-carotene in plant leaves 

 is given by Strain^*^. {Data regarding the a-carotene content of carotene 

 preparations are given on p. 130). 



Source 

 Arbutus (fruit) 

 Cantharellus species 

 Citrullus vulgaris 



Cladophora Saiiteri 



Coleosporium senecionis 

 Convallaria majalis 



Cow fat 



Cucurbita maxima (fruit) 

 Cuscuta subinclusa and 

 Cuscuta salina 

 Oil from Cyclopterus 

 Dendrodoa grossularia 

 (Sty clops is) 



Diospyros costata (fruit) 

 Formosa tea-leaves 



TABLE 36 



OCCURRENCE OF a-CAROTENE * 



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 L. Zechmeister and A. PolgAr, /. biol. Chem. ijg 

 (1941) 193. 



I. M. Heilbron, E. G. Parry and R. F. Phipers, 

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 Chem. 2oy (1932) 25. 



L. Zechmeister and P. Tuzson, Bcr. 67 (1934) 154. 

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G. Mackinney, /. biol. Chem. 112 (1935) 421. 

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I, 441. 



K. ScHON and G. Mesquita, Biochem. J. 30 (1936) 



1966. 

 Gonocaryum obovatum (skin) A. Winterstein, Z. physiol. Chem. 215 (1933) 51. 

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Genista tridentata 



Gorse 



Haematococcus pluvialis 

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1585. 



J. TiscHER, Z. Physiol. Chem. 252 (1938) 225. 



P. J. Drumm and W. F. O'Connor, Nature 145 {ig4o) 



425. 



Only references to investigations resulting i n the isolation and unambiguous identific- 

 ation of the pigment are included. 



References p. 165-170. 



