Vor. I] STEWART—BOTANY OF THE GALAPAGOS ISLANDS 115 
and set in a deep cup-like depression in the ovary. Ovary 
pyramidal, rounded, and covered with fascicles of short stiff 
spines set in a bunch of short velvety bristles. Style thickened, 
terminating in 9-11 stigmas variable in number on the same 
plant. Stamens numerous. Segments of the young plant ellip- 
tical oblong, yellowish green in color, and covered with fasci- 
cles of slender and rather flexible spines. This species can be 
readily distinguished from O. galapageia by the long slender 
trunk, irregularly shaped crown, pendant branches, and 
pungent spines. Plates VII, fig. 1; XIII, fig. 2; and XVI to 
XVIII. Endemic. 
O. sp.— ALBEMARLE IsiL.: Cape Rose, common on lava cin- 
ders near the coast. INDEFATIGABLE ISL.: north side, abund- 
ant ; northeast side, occasional in loose ashy soil near the coast, 
abundant one or more miles inland. Srymour Ist., souTH: 
abundant, forming low tree-like bushes 5-6 ft. high, (no. 
3015). 
This appears to be entirely distinct from any of the other 
species of Opuntia found on the islands, but as there is so much 
variation among the species of this genus here, it may prove to 
be an interesting variation of O. myriacantha, to which it is 
evidently most closely related. As no flowers were secured, its 
specific identity must remain in doubt. The stem is short, 1 to 
1.5 m. high, and covered with fascicles of long stiff spines 
which remain attached to the plant throughout its life. The 
branches are short, segments yellowish green in color, and 
covered with fascicles of long and very stiff spines, some of 
which reach 7.5 cm. There are usually one or two of these 
long spines and 10 to 25 shorter ones in each fascicle. The 
branches sometimes show a tendency to droop, a character 
which is also common to O. myriacantha. As the present spe- 
cies is only found on Albemarle and Indefatigable Islands, 
where O. myriacantha also occurs, and on Seymour Island, 
which was evidently connected with Indefatigable at some not 
remote period, one is led to suspect that it may possibly be only 
a more xerophytic form of O. myriacantha. Plate XIX. En- 
demic. 
O. sp.—NarsorouGH IsL.: a species of an Opuntia was 
reported from the south side of this island by J. S. Hunter. 
It is probably one of the above. 
