248 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Heller in May, 1800. Thirty-three plants have been found on it, includ- 

 ing 4 grasses, 3 Eiiphorbiaceae, and 3 Mnlrncpae, but no ferns, no Rubia- 

 ceae, and no Compositae. Gardner is the only one of the Galapagos 

 Islands which on botanical exploration has yielded no peculiar plant. 

 Baur (2), 233, speaks of the flora of Gardner as being the same as that 

 of Hood, and doubtless there is great habital similarity, but of the 33 

 plants known to grow on Gardner, only 22 have been found on Hood, 

 while no less than 31 have been observed on Charles. 



Hood Island. 



Hood is a desert island of elliptical form, lying to the southeast of the 

 other islands. It is nearest Chatham, Barriugtoii, Gardner, and Charles. 

 According to Dr. Baur, it is a low tableland with few peaks, the highest 

 only 200 m. in altitude, and thus still wholly within the lower dry strata 

 of the atmosphere. There are no trees of size on Hood, and the ground 

 is strewn with large angular masses of rock. Dr. Baur states that cacti 

 are here less abundant than on the other islands, and that the Opuntia 

 is short and thick-stemmed. Hood Island has also been visited for 

 botanical purposes by Dr. Habel, Professor Lee, and by Messrs. Suod- 

 grass and Heller. Altogether 55 different plants are known to occur on 

 the island ; of these only two are peculiar to it, namely : Amarcuithus 

 sclerantoides, forma hoodens/s, a mere leaf form, and Acanthospermum 

 lecocarpoides, a well marked species. Of the plants of Hood, 20, or 

 about 36 per cent, are peculiar Galapageian forms. There are no ferns, 

 8 grasses, 7 Leguminosae (including the Brazilian Geoffraea superba, not 

 collected elsewhere in the Galapagos), 5 Convolvulaceae, 5 Boi-ayinaceae, 

 and 6 Compositae. There are no Rnbiaceae and only 3 Euphorbiaceae. 

 About three-fourths of the plants of Flood are also found on the lower 

 arid slopes of Charles and Chatham Islands, while only about one-third 

 of them have been observed on Indefatigable. 



Indefatigable Island. 



Indefatigable is one of the larger islands, and is centrally situated in 

 the archipelago. It is broadly elliptical, some 32 km. in diameter, and 

 formed of a single, rather symmetrical volcanic mountain, rising to a 

 considerable height. In the basin of the cone is a large area of well- 

 watered land, which, according to Captain Tanner, possesses considerable 

 natural resources. Indefatigable was first explored botanically by 

 Andersson, who could, however, spend only a few hours upon it. It has 



