TANS. 



N. O. 140. ASCLEPIADACE.E. ASCLEPIADS. 

 Calotropis gigantea. R. Brown. Curled-flowered Calotropis. 



Linn. Syst. Pentandria Digynia. 



The milk sap. 



Vernacular. See "Drugs." 



Habitat. India. 



N. O. 162. VERBENACEJS. VERBENES. 

 Avicennia tomentosa. Linn. Downy-leaved Avicennia. 



Linn. Syst. Didynamia Angiospermia. 



The bark. 



Vernacular. Bina, Beng, Oepata, Mai. 

 Habitat. Salt marshes of the tropics. 



Remarks. First described by Van llheede,"and is Buchanan's A. Oepata* 

 Other species of Avicennia are used also as tans. 



The remaining Indian tans are : 



N. O. 195. Euphorbiaceae, Phyllanthus Emblica, W. The 



fruit, Emblic Myrobalan. See " Drugs." 

 N. O. 251. Palmse, Areca Catechu, the extract of the nut, 



Catechu ; arid the gall, Mockurrus, See " Drugs". 

 The bark of Casuarina equisetifolia, Fost. N. O. 213, Casnarinacese, 

 of Australia and the Pacific islands, and which flourishes luxuriantly in 

 Bombay, is a valuable tan. Various tans are supplied also by N. O. 112. 

 Corylacese, namely, Galls by Quercus infectoria, Oliv. of Asia Minor, 

 Valonia, the cups, Camata, the half-grown acorns, and Camatina, the half- 

 grown ovules of Quercus Myilops, Spreng. also a native of Asia Minor ; 

 and Oak-bark by Quercus. Robur. Linii. of Britain. Many tans are 

 used as dyes. 



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