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TWEEDIA C(ERULEA. 
open border in the summer months, and trained to a detached trellis, a pole, or a 
wall, the blossoms assume a most lively azurean hue ; and, being exceedingly 
numerous, produce a highly ornamental effect. 
From these declarations, it will be seen that summer exposure is the most 
appropriate treatment which this plant can receive. Indeed, it is quite essential 
to the proper development of its natural characteristics, and its investiture with 
sufficient interest to render it deserving of general cultivation. As this mode of 
culture is likewise the most convenient, and attended with the least amount of 
trouble, another cogent reason is afforded in favour of its universal adoption. 
Specimens of this species may be planted at the base of pillars, pedestals, or 
any kind of trellises, about the beginning of the month of June ; and here they 
should either be protected during the following winter, or pruned and removed to 
a greenhouse towards the decline of autumn. Trained against a conservative wall, 
where it can be effectively preserved from winter winds and frosts, T. coerulea 
would form an attractive feature, and doubtless thrive with great vigour, as well 
as blossom abundantly. Little danger could attend this management, as, if the 
shoots were annually destroyed, new branches would be formed at the commence- 
ment of each succeeding year. It has usually been considered an herbaceous 
plant ; but, as we are assured that it exhibits a shrubby habit when kept in a 
stove, it is most probably a decided shrub. 
Its propagation is easily effected by cuttings of the young shoots, and large 
specimens may perchance produce seeds ; but we have not yet seen the latter 
supposition realized. 
The plant from which we procured our drawing bloomed in the nursery of 
Messrs. Rollison, Tooting, in October, 1838. It is again flowering at the present 
time in the same collection. We believe the months of July and August to be 
its natural flowering season. 
Professor Don states that the genus Tweeclia is nearly allied to Sarcostemma, 
being principally distinguished by the absence of the exterior crown, by the form 
and length of the pollen gland, and by the presence of a tooth to each of the 
pedicels. It was named after Mr. James Tweedie, by whom, as before stated, 
it was originally found, and transmitted to this country. 
