12 



Puriri : Source Vitex littoralis. Alum lake, yellow. 



Quercitron: Source Quercus velutina and varieties. Yields quercetin, yellow. 



Quebracho: Source Quebrachia lorentzii. Yellow color. 



Redwoods: See Brazil, Bahia, Peach, Nicaragua, Sapan, Lima, Braziletto, Bar, and 

 Camwood. These woods yield on treatment various red to yellow-red colored 

 solutions, no two woods giving exactly the same shades, i. e., Brazilin, proba- 

 bly occurring as a glucoside, forms Brazilein on oxidation and yields lakes sim- 

 ilar to alizarine. Florence, Berlin, and Venetian lakes are lakes of the soluble 

 redwoods. 



Rhubarb: Source Rheum ojfitinale. 'Yields chrysophanic acid, yellow. 



Rue: Source Ruta graueolens. Alum lake, yellow. 



Safflower; or dyer's saffron, carthame, safran batard, bastard saffron: Source 

 Carthamus tinctorius. Yellow color. Triturated with French chalk and dried, 

 forms various bright red "rouges." 



Saffron; or azafran (Afgh.): Source Crocus sativus. Yellow. 



Sage: Source Salvia officinalis. Yellow. 



Sandalwood; or santalwood, lignum santalum, red santalwood, Saunders wood, red 

 sandal wood, red Sanders wood, bois de santal, Sandelholz: Source Pterocarpus 

 santalinus; P. indicus. Contains santalin, a fine red powder easily soluble in 

 alcohol and acetic acid with a blood-red color. See under Redwoods. 



Sapan wood; or sappan wood, Japan wood, bois du Japon, also called red sandal- 

 wood, santalwood, sumbawa wood: Source Caesalpinia sapan. Probably iden- 

 tical with caliatur wood or cariatur wood. See under Redwoods. 



Saw-wort: Source Serratula tinctoria. Alumina lake, yellow. 



Sepia: Source Sepia offidnalis. Dark-brown ink-like pigment. 



Sorgo red; or durrha: Source Andropogon sorghum. Lakes, crimson red. 



Spanish trefoil: Source Trifolium sp. 



Spinach: Source Spinacia oleracea. Yellow. 



Stringy bark: Source Eucalyptus macrorhyncha. Orange to yellow. 



Sun dew: Source Drosera ivhittakerii. Lakes red to brown. 



Sumac (Cape); or pruim bast: Source Colpoon compressum. Alum lake, yellow. 



Sumac (Sicilian) : Source Rhus coriaria. Alum lake, olive yellow. 



Tyrian purple: Source Murex, purpura, buccinium, etc. (sea shells). 



Turmeric; or curcuma, Indian saffron, terra merita, souchet, safran d'Inde: Source 

 Curcuma longa; C. rotunda. Yellow color. 



Ventilago Madras-pa tana; or oural patti, pitti, lokandi, kanwait, etc.: Source 

 Ventilago madraspatana. Lakes, blue. 



Virginia creeper: Source Parthenocissus quinquefolia. Red color. 



Waifa; or hoai-hoa, Chinese yellow berries: Source Sophora japonica. Alumina 

 lake, yellow. 



Wall flower: Source CJieiranthus cheiri. Yellow lakes prepared from the blossoms. 



Wall lichen: Source Parmelia parietina. Yellow. 



Waras: Source Moghania congesta (Flemingia congesla Roxb.). Red resinous 

 powder. 



Weld; or wau, gaude, yellow weed, dyer's rocket: Source Reseda luteola. Alumina 

 lake, yellow. 



Whitethorn; or blackthorn: Source Crataegus oxyacantha. Yellow lakes from 

 blossoms. 



Woad; or pastel, waid: Source Isatis tinctoria; I. lusitanica. Contains indigo. 



A large number of vegetable substances contain coloring matters, 

 but are too numerous to mention and are of little interest commercially 

 as yet. Among these the following may be mentioned, their coloring 

 matters having been to some extent studied. 



