CONTRIBUTIONS TOWARDS A 
thé turf beside the rivulets. The same 
species is found also on Chimborazo; but 
I have seen it only on those two mountains. 
The Sida Pichinchensis, incorrectly named, 
because its habitat is by no means limited 
to Pichincha, grows in the sands near the 
summit, and close to the snow I found the 
same dwarf Andromeda we had met with 
on Pichincha; and in general, the Flora of 
these two mountains is, in every respect, 
similar. The following table will give an 
idea of the mean temperature of the house 
of Antisana, from observations made by 
Professor Jameson and myself in July, 
July Ist. .6 a. M. .33° 
7 49.9 
84 s. a 
: Water 44° 
3 = P. M. 45 Tire 33? 3' 
E 
5. cor OU: 
Mean. .38° 6' 
M. ficdisings alt, from the temperature of 
the ground, reckoned the mean at 40° 1. 
An hygrometer, on Leslie’s principle, gave 
33° 3'— 69^ 7' of Saussure. e dryne 
of the atmosphere at these elevations of 
Antisana is diminished by the clouds al- 
most constantly gathering round the cul- 
minating points of the Andes. 
We varied our direction, on our return, 
for the purpose of visiting a volcanic erup- 
tion, near Licso. It is one of the freshest 
in the country, having taken place in 1801. 
The head of it exhibits the appearance of 
a circular area, full of black scorie of cal- 
cined pumice-stone, without, however, any 
trace of a crater or profundity. From 
hence we observed, as it were, an immense 
torrent of the same materials poured down 
the ravine below, for a distance of about 
three miles, exactly to the point where the 
T road to Pinantura crosses the dell. 
Boussingault doubted, ries whe- 
m this should be considered as a torrent, 
or a simultaneous eruption hm a longitu- 
dinal fissure. The want of a proper crater 
supports this opinion, and it may be added, 
— the scorie all down the ravine are 
FLORA OF SOUTH AMERICA. 29 
heaped into a figure of a ridge, which 
seems more naturally the consequence of 
having been thrown up than poured down 
from the head of the valley. An eruption 
of Antisana in 1590 is mentioned by the 
Academicians; and M. Boussingault consi- 
dered traces of fire to exist in a cave near 
the farm-house. The sharp broken pinna- 
cles of the southern extremity of the Ne- 
vado are a further confirmation. This ap- 
pearance is recognized in Pichincha, Car- 
guirazo, and Capac Ucu, undoubted vol- 
canoes. Truncated cones, such as Cotopaxi 
and Tunguragua, afford equal or stronger 
indications ; while the dome of Chimborazo 
proves merely that its eruptions have been 
lateral. As we arrived rather late at the 
volcano of Licso, our intention was to sleep 
at the farm-house, and repeat our visit in 
the morning ; but it was decreed we should 
carry into effect only the first half of our 
plan. We had been but an hour or two in 
bed when we were both awakened by a sharp 
darting pain in the eyes, and very soon 
found that the glare of the snow had almost 
wholly deprived us of sight. M. Boussin- 
gault's negro servant and an Indian, who 
ss had accompanied us, were found to be in 
nearly the same state, and the next morn- 
ing we returned to Pinantura, M. Boussin- 
gault, with his mule led by an Indian, 
being unable to distinguish a step of the 
road, and the rest of us nearly in as bad a 
plight. Our lips and faces were also so 
chapped and peeled, that it took us nearly 
a week in Quito to recover our sight and 
human aspect. 
(To be continued.) 
CONTRIBUTIONS TOWARDS A 
FLORA OF SOUTH AMERICA 
AND THE ISLANDS OF THE 
PACIFIC. 
By W.J. Hooker, LL.D. and G. A. W. Arnott, Esq. 
A.M. F.R. S.E. 
I Exrra-Tropicat SOUTH ÅMERICA. 
( Continued from p. 322 of the Botanical Journal. ) 
COMPOSIT. 
e above Journal, we 
ore of th 
ted our team to reserve our- 
