ix, c, 2 Merrill: The Plants of Guam 129 
CERBERA Linnaeus 
CERBERA LACTARI A (G. Don) Ham. ex DC. Prodr. 8 (1844) 353; Vale- 
ton in Ann. Jard. Bot. Buitenz. 12 (1895) 245, t. 26, f. 1-5. 
Tanghinia lactaria G. Don in Sweet Hort. Brit. ed. 3 (1839) 461. 
G. E. S. 196, McGregor 568, along the seashore, locally known as chuti 
or chiute. 
I have followed Valeton in holding this as a species separate from the 
Indian Cerbera odollam Gaertn., although it is not certain whether or not 
tfie distinguishing characters indicated by him are entirely constant. The 
abundant Philippine material distributed within the past ten years as 
Cerbera odollam Gaertn., is all referable to C. lactaria Ham., as inter- 
preted by Valeton. The species appears to be distributed from eastern 
Malaya to Polynesia. 
A strict interpretation of the generic type of Cerbera, that is, the first 
species cited by Linnaeus, would probably apply the generic appellation 
Cerbera to the plants now placed in the genus Thevetia. Linnaeus de- 
scribed three species, Cerbera ahouai, C. manghas, and C. thevetia in the 
first edition of his Species Plantarum; the first and last are species of 
Thevetia, while Cerbera manghas is in part the same as C. odollam Gaertn., 
and in part Tabernaemontana dichotoma Roxb. I believe that Cerbera 
manghas Linn, should be retained as the oldest name for the species com- 
monly known as C. odollam Gaertn., in spite of the fact that Linnaeus' 
species was a mixture. 
NERIUM Linnaeus 
NERIUM INDICUM Mill. Gard. Diet. ed. 8 (1768) no. 2. 
Nerium odorum Soland. in Ait. Hort. Kew. 1 (1789) 297. 
Nerium oleander Safford in Contr. U. S. Nat. Herb. 9 (1905) 331, non 
Linn.? 
G. E. S. 106, 391, locally known by its Spanish name adelfa. 
A species widely distributed in the Indo-Malayan region in cultivation; 
the Guam specimens appear to me to be referable to Nerium indicum Mill. 
( N . odorum Soland.), rather than to N. oleander Linn. 
LOCH N ERA Reichenbach 
LOCHNERA ROSEA (Linn.) Reichenb. Consp. (1828) 134. 
Vinca rosea Linn. Syst. ed. 10 (1759) 944; Safford 310. 
G. E. S. 104 , 371, McGregor 364, cultivated in gardens, locally known 
by its Spanish name chichirica. 
A native of tropical America, now widely distributed in the tropics of 
the world in cultivation and as a naturalized plant. To be consistent with 
the American code of nomenclature, the designation of this plant should 
be Ammocallis rosea (Linn.) Small, rather than Lochnera rosea (Linn.) 
Reichenb. under which name Mr. Wight recorded it from Guam. 
OCHROSI A Jussieu 
OCHROSIA MARIANNENSIS A. DC. Prodr. 8 (1844) 357; Safford 336. 
G. E. S. 290, locally known as langiti. 
A species known only from Guam, the above being apparently its 
second collection. It belongs in the section Lactaria. A duplicate of 
No. 290 has been critically compared with the type in the DeCandolle 
herbarium by C. DeCandolle, who writes that they are identical. 
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