48 
one hundred and thirty-three in the silicious. Very few plants 
were found to be common to both formations, the Cuban walnut, 
Juglans insularis, to our surprise being one of these found on 
oth. 
On September 5, having packed and shipped the entire collec- 
tions and my outfit to Pinar del Rio by caretta and arranged for 
the shipment by rail from there to Havana, I went on horseback 
to Guane, for the purpose of seeing the sierras lying southward 
of these that I had already seen or examined about Sumidero. 
I found that they are very extensive south of Luislazo; a range 
extends westward to Mal Paso, where the river cuts its way 
ough a narrow gorge, after which it ae a broader valley 
separating two ranges running north and s . The western 
range diminishes gradually and terminates at os Acostas; the 
eastern range is more massive and extends further south, termi- 
nating abruptly with a southern exposure several miles wide at 
Punta de la Sierra. From this hasty and often distant view I had 
of these mountains, I concluded that the general formation was 
quite similar to those I had already examined and that the same 
species of plants occur among them with the exception that there 
are a number of fissures or canyons which may contain running 
water, in which case a different and richer plant association is 
to be expected. 
Southward of Punta de la Sierra the valley of Rio Cuyaguateje 
broadens and is bounded by silicious hills, once, no doubt, 
covered by pine forest, but now quite barren of any arborescent 
flora. Occasional protrusions of the lime rock occur in the 
valley, the most extensive being in the vicinity of Teneria, where 
it is distinctly stratified horizontally and forms a low 
about seventy-five feet high, extending about half a mile rues 
nally across the valley. Southward and several miles to the east 
of Portales rises Sierra Guane, about which I collected Jast winter. 
Occasional clumps of lime rock are seen along the roadsides. One 
of these, which covers about 100 square feet and is not over fif- 
teen feet high with a fresh-water spring at the base, rises out of 
a level field and is shaded by a number of large mango trees. This 
was literally covered with a triangular creeping cactus of the 
