THEACEAE 
Laplacea semiserrata (Mart. & Zucc. ) Cambessedes 
in St. Hilaire Fl. Bras. Mer. 1 (1825-1827) 300. 
Mexico: Oaxaca, District of Tehuantepec, Ubero, alt. 20-90 m., 
April 1937, Llewelyn Williams 9170; District of Choapam, between 
Monte Negro de Lalana and San Juan Lalana, long. 95°45/, lat. 17° 
26’, alt. 450 m., May 6, 1939, Schultes & Reko 798. 
Although Laplacea semiserrata is rather widespread, 
occurring throughout Central America and in South 
America southward to Brazil, it is known from Mexico 
from only two collections. In his Flora of Costa Rica 
(Field Mus. Nat. Hist. Bot. Ser. 18 (1987) 702), Stand- 
ley stated that the occurrence of this species in Mexico 
was open to question. Since that time, however, the two 
collections which are cited above have established the 
presence of L.semiserrata in the lowland tropical forests 
of eastern Oaxaca. The localities of these collections lie 
in adjacent districts. 
The collection, Llewelyn Wilhams 9170, which has 
been labelled ‘‘Laplacea Williamsu Standl. sp. nov.”’, 
(a nomen nudum), is the basis of Williams’ reference to 
Laplacea Williamsu Standley in his Arboles y arbustos 
del istmo de Tehuantepec (in Lilloa 4 (1989) 145). I have 
examined an isotype from this collection and find that it 
is referable to L.semiserrata (Mart. & Zuce.) Cambess. 
ARALIACEAE 
Oreopanax capitatum (.Jacq.) Planchon & Decaisne 
in Rev. Hort. 1854 (1854) 108. 
Mexico: Oaxaca, District of Choapam, Santiago Choapam, long. 
95°55/, lat. 17°20’, alt. 1000 m., May 13, 1939, Schultes § Reko 907 
(Keon. Herb. Oakes Ames No. 5833; Herb. Gray). 
This collection was cited (in Bot. Mus. Leafl. Harv. 
Univ. 9 (1940) 27) as Oreopanax platyphyllum Marchal, 
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