base having five nectariferous cavities; segments elliptico-oblong, 
scarcely pointed ; corona simple, of five segments, which are ligulate 
obtuse, fleshy, revolute at the apex. Stamens 5, forming a mona- 
delphous tube around the styles ; filaments membranous; anthers yel- 
low, terminated by a broad, oval, retuse, membranous appendix. 
Po.ieNn-masses club-shaped, compressed, amber-coloured, pendu- 
lous; each pedicel having a sharp recurved tooth. GLanp linear, ob- 
tuse, erect, channelled externally, of a chocolate colour, shining, longer 
than the pollen-masses. GyNosTEMium 5-angled, the apex prolonged, 
conical, white; angles blunt, orange-coloured. Ovaries 2, smooth, 
swelling. Styzies short. Stiemas compressed, acute. 
Poputar anp GrocrapnmicaL Notice. This highly ornamental’ 
plant was discovered by Mr. Tweedie, at Tucuman, in South Ame- 
rica. In addition to the beauty of its flowers, which are displayed 
from April till August, their colour merits attention, as the hue which 
they present is of rare occurrence in this tribe, though frequent in the 
allied one of the Apocynacer, (of which the Vinca or periwinkle is 
an example), yet a similar colour exists in the Marsdenia tinctoria, 
growing in Silhet, in the East Indies, where it yields an excellent in- 
digo, and it is not improbable that indigo might be procured from this 
Tweedia. The Gymnema tingens, has also blue flowers, and is used 
in dying. The Nerium tinctorium, (Réottler), now Wrightia tinctoria 
(R. Brown), among the Apocynacex, is preferable for cultivation in 
India, as a source of ‘indigo, to any Indigofera, (See Royle’s Illustra- 
tions of the Flora of the Himalaya, p. 270). Sir W. J. Hooker re- 
gards this genus Tweedia as allied to Metastelma; Prof. Don, to 
Sarcostemma, which last has the corona double. 
Inrropuction ; WHERE GRowN; CuLrurr. Seeds were sent by 
Mr Tweedie, in 1835, to Mr. Niven, of the Glasnevin Garden, Dub- 
lin, to whom we are indebted, for the opportunity of publishing this de- 
sirable novelty, as well as for the following information. “The 
seeds were sown on a smart bottom heat ; Ferow it in flat seed 
pans, filled with sandy loam, and a little peat, trained to a mat trellis in 
a sunny exposed situation in the stove. The effect of its lovely sky- 
blue flowers, when so managed is beautiful in the extreme. It may 
be propagated by seeds or cuttings.” 
DeERIvation OF THE ; Names. 
Tweepis. Justly named in mone to Mr. Tweedie, its disc 
Ceerulea, blue, the colour of the go ‘ sabre 
NONYMEs. 
TWEEDIA C@ERULEA "Yen ;in Saati British Flower Garden, fol. 407. 
TWEEDIA VERSICoLOR. Hooker, i in Botanical Magazine, folio, 3630. 
