FLOWERING PLANTS COLLECTED ON THE 

 PRESIDENTIAL CRUISE OF 1938 



By ELLSWORTH P. KILLIP 

 Associate Curator, Division of Plants, U. S. National Museum 



The flowering plants collected by Dr. Waldo L. Schmitt on the 

 Presidential Cruise of 1938 are enumerated herewith, with the excep- 

 tion of a new palm, described by Dr. O. F. Cook in a preceding paper 

 of this series. Among the 25 species represented several are very rare, 

 being known only from the Galapagos Islands. These specimens are a 

 valuable addition to the National Herbarium. 



NAJADACEAE 

 Najas marina L. Sp. PL 1015. 1753. 



Clipperton Island; lagoon back of landing place (no. 102). This 

 collection represents form "A" in Rendle's monograph of the family, 1 

 the leaves being much broader than in the form common in the United 

 States. This species is widely distributed throughout the world. 



GRAMINEAE 

 Aristida subspicata Trin. & Rupr. Mem. Acad. Petersb. VI. 7: 125. 1849. 



Elizabeth Bay, Albemarle Island (no. 107). Endemic to the 

 Archipelago. 



Cenchrus echinatus L. Sp. PL 1050. 1753. 



Clipperton Island (no. 104). A common tropical weed. 



AMARANTHACEAE 



Alternanthera echinocephala (Hook, f.) Christophersen, Nyt. Mag. Natur- 

 vidensk. 70 : J3. 1932. 

 Brandesia echinocephala Hook. f. Trans. Linn. Soc. 20: 189. 1847. 



Charles Island (no. 119). Endemic to the Archipelago. 



Alternanthera nudicaulis (Hook, f.) Christophersen, Nyt. Mag. Naturvi- 

 densk. 70: 73. 1932. 

 Bucholtzia nudicaulis Hook. f. Trans. Linn. Soc. 20: 191. 1847. 



Charles Island (no. 126). Endemic to the Archipelago. Identified 

 by John Thomas Howell, California Academy of Sciences. 



1 Pflanzenreich 4 12 . 1901. 



Smithsonian Miscellaneous Collections, Vol. 98, No. 8. 



