INSULAR FLORAS. 3gg 



gummy or pitchy substance." Greene gives particulars of 

 the height of this tree ; but Palmer describes it as "a dwarf 

 tree five to six feet high ". Brandegee has identified it (21) 

 with Schinus discolor (22) found in Magdalena Bay, Lower 

 California ; but we think erroneously, though we have not 

 space to discuss the question here. Hauya arborea (CE110- 

 tkera arbored) is another remarkable plant from Cedros 

 Island. It can hardly belong to either of the genera to 

 which it has been referred ; certainly not to the latter. In- 

 deed, we think there is very little doubt about its being a 

 species of Zauschneria, and perhaps only a shrubby condi- 

 tion of Z. californica, which is known to vary very much 

 under different conditions. The name arborea is a little 

 misleading, because, although the plant becomes woody, it 

 only grows six to eight feet high, and seldom exceeds two 

 or three inches in diameter. The anomalous Mexican and 

 Lower California!! genus Fouquieria, which has been re- 

 ferred to such widely different orders as the Polemoniaceae 

 and Tamariscineae, is represented by a yellow-flowered 

 species of singular habit, named F. columnaris, but originally 

 a new genus under the name of Idria. Agave Sebastiana 

 is an endemic species, well represented in a view of one of 

 the bays of the island in the earliest publication cited (20). 

 Greene's report (19) contains many more highly interesting 

 details ; but until the botany of the mainland of Lower Cali- 

 fornia is better known it would be idle to speculate whether 

 the numerous strange plants found in Cedros Island are 

 really endemic. 



Proceeding southward we come to the Revillagigedo 

 Islands, the largest of the group, lying nearly in the same 

 longitude as Cape San Lucas, Lower California. These 

 islands have never been thoroughly botanised ; yet, 

 as they are upwards of 250 miles from the nearest part of 

 the mainland, or any land, with an elevation of 2000 feet, 

 some interesting results might be expected. Mr. C. H. 

 Townsend, the ornithologist of the Albatross expedition, re- 

 ferred to below, collected a few plants in Socorro, the largest 

 island of the group, twenty-four miles long by nine miles 

 broad, and in Clarion or Cloud Island, about 4 to the west- 



