Vol. I] STEWART— BOTANY OF THE GALAPAGOS ISLANDS US 



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 Isl. : 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. Seymour Isl., 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. — Narborough Isl. : a species of an Opuntia was 

 reported from the south side of this island b)^ /. 5. Hunter. 

 It is probably one of the above. 



