622 ON A NEW SPECIES OF CALYCOPHYLLUM. 
assist you to form some idea of the picture I beheld at one 
of the valleys of the river Rupununi, where a high mountain 
on the river's left bank turns its bed boldly to the east. The 
banks of the stream, and the steep side of the hill were alike 
covered with trees, clothed with rose-coloured leaves, and 
only on a near approach, the shining green leaves, and the 
spikes of flowers of a velvety blue, were discovered. 
There are several genera of the natural family of Rubiacee, 
as Calycophyllum, Mussenda, Pinkneya, &c., where one of 
the teeth of the calyx expands into a petioled and coloured 
leaf of a membranaceous texture. 
In the tree under description this is the case in such a 
remarkable way, that these bract-like organs of different 
shades of rose-colour are so numerous as to give the whole 
landscape a peculiar character which appears couleur de 
rose. ! 
1t proved a new species of Calycophyllum and as I am 
prevented, by the existence of a genus Stanleya, from naming 
one of the new genera discovered during the expeditions in 
the interior of Guiana, under authority of Her Majesty's 
Colonial Office and during the execution of which the Right 
Honourable Lord Stanley presided as Secretary, after his 
Lordship, I have received his permission to make this 
splendid tree known to Botanists under the name of Caly- 
cophyllum Stanleyanum. 
CarycoPuvnLuM, De Candolle, Familia RUBIACES, 
Prodromus, v. 4, p. 367. | 
C. Stanleyanum (Schomb.); foliis ovalibus vix acuminatis 
basi cuneatis utrinque glabriusculis, racemis strictis VIX 
ramosis, floribus sessilibus, calycis limbi dentibus acutis uno 
in floribus paucis bracteisque 1-2 inferioribus in laminam 
maximam  petaloideam  orbiculatam petiolatam expansis. 
(Tabs. XXIII. XXIV.) = 
Arbor 40-50 pedalis, ramis glabris teretibus, cortice 
cinereo. Folia opposita, 3-4 poll. longa, 14-2 poll. lata, 
v. ramealia minora, membranacea, penninervia et reticulatn 
