478 Select Plants for Industrial Culture and 



Rubus tiliaceus, Smith. 



Indian mountains, at altitudes between 3,000 and 8,000 feet ; also 

 in Polynesia. A rambling species. Fruit large, purplish-black, but 

 rather insipid. 



Rubus trivialis, Michaux. 



South-Eastern States of North -America. Another Blackberry- 

 shrub with particularly palatable fruits, which are large and ripen 

 very early in the season. The plant will thrive in dry sandy soil. 

 Like many other congeners, this one has the bark rich in tannic acid. 

 Introduced by the writer of this work into Australia. The Logan- 

 Blackberry is a hybrid between the Californian Blackberry and the 

 Californian Raspberry. It is a heavy bearer of fruits of great ex- 

 cellence ; it stands heat and aridity which destroy the Blackberry 

 and Currant. 



Rubus ursinus, Chamisso and Schlechtendahl. (R. macropetalus, Douglas.) 



California and Oregon. An unisexual shrub. Fruit black, oval- 

 cylindric, particularly sweet. Readily rendered spontaneous. It 

 would lead too far to enumerate other utilitarian kinds of Rubus, 

 although altogether about one hundred genuine species do occur, 

 which render the genus one of very wide dispersion over the 

 globe. 



Rubus villosus, Aiton. 



Eastern North- America, reaching Canada, there one of the Black- 

 berry-bushes. Growth tall. Fruit large and pleasant [Asa Gray]. 

 The Rochelle- and Lawton-varieties are of this species [C. Koch]. 

 The Eldorado Blackberry-bush is either this or a closely allied 

 species [Professor Hilgard]. The root-bark is praised for medicinal 

 purposes. 



Rumex Acetosa, Linn& 



The Kitchen-Sorrel. Europe, Middle and Northern Asia to Japan, 

 also in the frigid zone of North-America. Endures the frost of 

 Norway northward to lat. 71 10' [Schuebeler] A perennial herb. 

 The tender varieties, particularly the Spanish one (R. Hispanicus, 

 Koch), also the alpine one (R. montanus, Desfontaines) serve as 

 pleasant acidulous vegetables, but must be used in moderation, as 

 their acidity, like that of the species of Oxalis (Wood-Sorrel), 

 depends on binoxalate of potash, which however by the cooking 

 process becomes much removed through the surplus liquid. The 

 South- African R. luxurians, L., serves likewise as culinary sorrel. 

 Aquatic species of Rumex help to solidify embankments subject to 

 floods. 



