416 The Botanical Gazette. [December, 
are common, and the curious screw-pine (Pandanus odoratis- 
simus) is occasionally seen. This latter is a very character- 
istic plant, but is much more abundant in some of the other 
islands. In this region several very showy species of Ipomoea 
are very common, among them the well-known moon-flower, 
I. bona-nox. 
With the increase in moisture, as might be expected, the 
mosses and ferns increase in number and beauty. There are 
many of them of types quite different from those of the 
United States. One of the commonest ferns of the lower 
elevations is Microlepia tenuifolia, a very graceful fern with 
finely divided leaves and terminal sori. Species of Vittaria, 
with very long undivided leaves, are also common here. 
As we ascend one of the commonest ferns is Sadleria 
cyatheoides, a very large fern, often more or less arbores- 
- cent. Ascending still higher the number and variety of ferns 
increases rapidly, and many beautiful and interesting ferns 
and mosses aud liverworts become common. - 
At about one thousand feet elevation we begin to meet 
with species of Cibotium, to which genus belong the largest 
of the tree ferns of the islands. Here, also, I met for the 
first time with the smallest of all the ferns I have ever seen, 
Trichomanes pusillum. This dainty little fern, one of the 
Hymenophyllacez, forms dense mats on rocks and tree- 
trunks, looking like a delicate moss. The full grown frond 
is fan-shaped and, with its stalk, is*not more than half an 
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very much like a Pandanus, is troublesome to get through, 
and often have we found ourselves walking on the tops of the 
bushes, three or four feet above the ground. As frequent - 
tough convolvuli and ipomoeas kept entangling our legs, PFO 
gress was rather slow. 
(Zo be concluded.) 
Leland Stanford Funior University. 
