172 EVOLVULUS PURPUREO-CiERULEUS. 
Mr. Purdie's attention was first attracted to it, by the strikingly brilliant appearance 
of its blue flowers, which at first sight might almost be mistaken for those of the 
Anagallis ccerulea. " These flowers are borne upon erect, twiggy branches, with 
small patent, or reflexed leaves. Its nearest affinity, as to species, is Evolvulus 
Arhuscula of Poiret ; but that species has still smaller, and erect leaves, not tapering 
at the base like those of E. purpureo-cceruleus." * 
It is a stove-plant, and was first raised from seeds in the Koyal Botanic Garden, 
Kew, where also the pale variety first exhibited its pretty flowers. It has since 
bloomed in the collection at Sion House, and also in several other parts of the 
country. 
Our drawing of the pale variety was made from a plant which flowered in the 
garden of Sir George Warrenden, during September, 1846 ; and the dark variety, 
from the pretty plant which Mr. Carton, gardener at Sion House, sent for inspection 
to the rooms of the Horticultural Society, Kegent Street. Both the varieties are 
of easy culture, growing with great freedom in a light sandy soil, or a mixture 
of sand and peat. 
They require a brisk heat, and a light and airy situation ; but enjoy a humid 
atmosphere, and a fair supply of water to the roots. 
They increase freely by cuttings planted in sand, and placed in a gentle moist 
heat ; and also by seeds, which they produce freely. 
The generic name is derived from evolvo to turn, in the same sense as 
Convolvulus, to which they bear considerable resemblance. 
* Bot. Mag., 4202. 
