348 SOUTH AMERICAN BOTANY. 
CLEOCHROMA. 
The plant with long, dark, purple flowers which I described 
under the name of Iochroma macrocalyx, Hook. (Lond. Journ. 
Bot. vol. iv. p. 339), was referred to that genus, on account of its 
being evidently congeneric with the Jochroma calycina, Bth. 
Since then, as I have just mentioned p. 342, I have had an oppor- 
tunity of examining the typical species Jochroma tubulosa, Bth., 
which I had not seen at the period referred to, and have indicated 
the reasons for associating Chenesthes with that genus; but at 
the same time it appears to me, that not only Z. macrocalyæ, but 
also 7. calycina, Bth., and I. grandiflora, Bth., should be detached 
from it, and retained as a separate group, for which I propose the 
name of Cleocroma, from &Xeos, prestantia, xpepa, color, on account 
of their large, handsome, purple flowers. The differences between 
it and Lochroma, which I will now proceed to point out, appear 
sufficient to warrant its assuming the rank of a distinct genus, 
but should it be thought otherwise, it may take its station as a 
third section of Zochroma : the differences between them are cer- 
. tainly much greater than those which separate Physalis and Sa- 
racha. ln Cleochroma the calyx is generally very large, much 
more so in proportion than in Iochroma, increasing even during 
the development of the flower, becoming sometimes nearly half the 
length of its long, tubular corolla, and swelling in the middle to a 
much larger diameter: it is in like manner persistent, and at 
length wholly encloses a berry of considerable size. The corolla 
is, in like manner, quite tubular, and also somewhat swollen in the 
middle, but the border is very considerably larger, more expanded, 
and deeply divided into five distinct segments, while in Jochroma, 
the border is very narrow, but little expanded, and almost entire. 
The contrast between the corolla of all the species of Jochroma 
and that of Cleochroma grandiflora, with its large azure-blue 
flowers, with the mouth broadly expanded into a campanular form, — 
and deeply cleft into five acute lobes, is very remarkable. In 
lochroma (including Chenesthes), the filaments of the stamens atè — — 
always more or less terete, and thickened towards the base, this —— 
