208 PROCEEDINGS OF THE AMERICAN ACADEMY. 
and Nachtr. zu iv. Ab. 5, 325 (1897) — revised by referring Phare- 
tranthus Klatt to Petrobium R. Br. While the name Petrobium R. 
Br. must, according to the International Rules of Nomenclature, give 
way to the earlier and adequately published name of Laamannia Forst. ' 
& Forst. f., the identity of Pharetranthus, supposedly of the Philippine 
Islands, with this peculiar monotypic genus, of the island of St. Helena, 
presents a taxonomic and geographic problem which seems never to 
have been discussed. Such an identity is certainly improbable on 
phytogeographic grounds, especially in the case of a species wholly 
unknown from intermediate localities. Dr. Klatt’s type of his Phare- 
tranthus ferrugineus is preserved in the Gray Herbarium, and in fact 
appears to be identical with Laamannia Forst. & Forst. f., the “ White- 
wood Cabbage-tree” of St. Helena. Examination of accessible works 
on the Philippine flora, including Mr. Elmer’s recent enumeration of 
the Compositae of the Philippine Islands, fails to show any record of 
the species in question. Under these circumstances it seems highly 
probable that there was some confusion of labels or other slip or error 
in attributing the plant of Cuming to the Philippine Archipelago. In 
this connection it is to be noted with interest that on his return voy- 
age Hugh Cuming stopped at St. Helena, where it is more than likely 
that he obtained the material upon which Dr. Klatt later founded his 
genus Pharetranthus, At all events such an origin would appear to 
be a permissible assumption or at least a justifiable working hypothesis 
until the plant can be re-discovered in the Philippine Islands if this 
ever happens. The synonymy of the species in question is as follows : 
XMANNIA ARBOREA Forst. & Forst. f. Char. Gen. 94, t. 47 (1776). 
Spilanthes arborea (Forst. & Forst. f.) Forst. f£. Com. Hort. Goett. ix. 67 
(1787). Spilanthes tetrandra Roxb. in Beatson’s Tracts, 301 (1816), 
which was the sterile plant, and Bidens arborea Roxb. 1. c. (1816), 
which was the corresponding fertile plant. Petrobiwm R. Br. Trans. 
Linn. Soc. xii. 113 (1816). P. arboreum R. Br. ex DC. Prod. v. 502 
(1836). Drimyphyllum Helenianum Burch. ex DO. 1. c. (1836). Phare- 
tranthus ferrugineus Klatt, Flora, Ixviii. 204 (1885). 
TraGoceras ScHrepEaNuM Less. Linnaea, ix. 269 (1834). To the 
synonomy of this species should be added Baltimora monocephala Klatt, 
Ann. k. k. Naturh. Hofmus. Wien, ix. 360 (1894), a species founded 
upon a specimen collected by Knechtel at Chapultepec, Mexico, and 
now in the Gray Herbarium. The identity appears first to have been 
noted by Dr. J. M. Greenman, but seems not to have been hitherto 
ed in print. : 
Monactis subdeltoidea, sp. nov., fruticosa ramosa ; ramis flexuosis 
crassiusculis subteretibus vix striato-angulatis brunnescentibus tomen- 
