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SELECT PLANTS READILY ELIGIBLE 



Rubia COrdifolia, Linne. (E. Mungista, Roxburgh.) 



From the Indian Highlands through China and Siberia to 

 Japan; also occurring in various parts of Africa, as far 

 south as CafFraria and Natal. This perennial plant produces 

 a kind of Madder. Probably other species yield likewise 

 dye-roots. The genus is represented widely over the globe, 

 but as far as known not in Australia. 



Rubia peregrina, Linne. 



Middle and South Europe, South- West Asia. This perennial 

 species yields also Madder-root. Several other kinds deserve 

 comparative test-culture. 



Rubia tinctorum, Linne. 



The Madder. Countries around the Mediterranean Sea. A 

 perennial herb of extremely easy culture. Soil fit for Barley 

 suits also for Madder. Its culture opens any deep subsoil and 

 sufibcates weeds, but requires much manure, leaving however 

 then the land enriched. Any stagnant water in the soil 

 must be avoided, if Madder is to succeed. The harvest is in 

 the second or third year. It can be raised from seeds or 

 planted from offshoots. The roots merely dried and pounded 

 form the dye. The chemical contents are numerous; in the 

 herb — Rubichloric and Rubitannic acid ; in the root — Alizarin, 

 Purpurin, Rubiacin, Rubian, Ruberythrin acid, and three 

 distinct resins; also Chlorogenin, Xanthin, and Rubichloric 

 acid. On the five first depend the pigments produced from 

 the root. Madder is one of the requisites for Alizarin Ink. 



Rubus Canadensis, Linne.* 



The Dewberry of North America. A shrub of trailing habit. 

 Fruit black, of excellent taste, ripening earlier than that of 

 R. villosus (Ait.), which constitutes the High Blackberry of 

 the United States, with large fruits. 



Rubus Chamaemorus, Linne. 



The Cloudberry. North Europe, North Asia, North America, 

 particularly in the frigid zone. A perennial but herbaceous 

 plant; a pigmy amongst its congeners. Nevertheless it is 

 recommended for introduction to our spongy mossy alpine 

 moors, on account of its grateful amber-coloured or red fruit. 

 All the species can readily be raised from seeds. R. Articus 

 (L.), also with edible fruit, is in the high north usually its 

 companion. Near to us we have a similar little herb, living 

 for a great part of the year in snow, namely R. Gunnianus 

 (Hook.). It occurs on the alpine heights of Tasmania, from 

 whence it might be easily transferred to our snowy mountains 

 and those of New Zealand. The fruit of R. Gunnianus is red 

 and juicy, but not always well developed. 



