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XXXIV. Some Account of the Ipomaea Tuberosa, recom- 

 mending its Cultivation. By Mr. John Turner, F. H. S 



Read January 2, 1810. 



Among the climbing plants which may be cultivated in 

 our stoves and green-houses, few deserve a place more than 

 the Ipomcea Tuberosa, its ornamental yellow flowers being 

 exceedingly fragrant, and the root in all probability differs 

 very little in medicinal properties from that of its congener, 

 the Jalap, which is at present erroneously placed under 

 Convolvulus. 



The reason for this conjecture is, that some years since, a 

 parcel of its roots were purchased by the late Mr. Ewbank, 

 an eminent druggist at ^Tork, for the officinal Jalap, who 

 perceiving some of them not yet dried, planted one in his 

 stove, which flowered and ripened seeds the following 

 summer. 



This plant, however, has been introduced into our collec- 

 tions at an earlier period, for it flowered in that at King's- 

 Weston, in the year 1778, and it was cultivated at Kew, in 

 1780. 



I. Tuberosa foliis palmatis : laciniis 7, lanceolatis, acu- 

 minatis, integerrimis, glabris : paniculis saepius S-floris : co- 

 rolla 2 pollicari : seminibus grandibus, hirtis. 



I. Tuberosa with palmated leaves : divisions 7, lanceolate, 



