MAY 4, 1923 COOK: NEW GENUS OF PALMS 179 
Raddi cites “Bert. Excerpta de Re Herb. 14.” This paper is not in 
the library of Washington. In another paper the same year‘! 
Bertoloni published Panicum sulcatum Bertol., citing Raddi’s collection 
from Brazil. This is apparently described independently of P. 
sulcatum Aubl. 1775. Glaziou 17396, Rio Janeiro, though a larger 
plant, is very like Raddi’s specimen. 
86. PoA BRASILIENSIS. “In sepibus prope Rio de Janeiro.” The 
specimen could not be found. The description is as follows: “‘pani- 
cula elongata stricta, ramis alternis adpressis, spiculis lineari-lance- 
olatis subdecemfloris, valvula corollae interiore margine brevissime 
ciliata; foliis bi-aut tripollicaribus, acuminatis, rigidis, margine in- 
volutis, ligula nulla. nob. Gramini tremulo affine, paniculatum elegans 
majus, spicis minoribus et longioribus. Sloan, H. J. p. 113. t. 71. 
jig. 1? (mala).”’ 
The original of the Sloane figure in the British Museum of Natural 
History was examined by Dr. A. S. Hitchcock in 1907. It is Hra- 
grostis cubensis Hitche., which is not found in Brazil. 
Nees” transfers Poa brasiliensis Raddi to Eragrostis “excl. synon. 
Sloanei.”’ and refers EL. bahiensis Schrad.* to it as a form with blades 
ciliate at base. Short-leaved specimens of this species, such as 
Capanema 5379, and 5386, Brazil, agree well with Raddi’s description. 
The ligule is not wanting as stated by Raddi, but. is very minute. 
89. MeGasTacHyA SwaAINsoNni. “Species rarissima, quam mihi 
benevole communicavit D. Swainson red. ex itinere Pernambucano ad 
Urbem Rio-janeiro.” The specimen is a small tuft of Hragrostis 
maypurensis (H. B. K.) Steud., with small, somewhat capitate pan- 
icles, as in Jardim Botanico do Rio de Janeiro no. 5535, collected by 
Luetzelburg; 3742, collected by Léfgren, and 5382 collected by 
Capanema. 
BOTAN Y.—Opsiandra, a new genus of palms growing on Maya ruins 
in Petén, Guatemala. O. F. Coox, Bureau of Plant Industry. 
A palm that grows in the ruined Maya cities of Petén apparently 
has not been described. The ruins are buried in the forest, with palms 
and other trees often growing upon the terraces, walls, or roofs of the 
buildings. The chief center of the early Maya civilization, in the 
district of Tikal, Uaxactun, Nakum, and Naranjo, is supposed to have 
been abandoned about fifteen centuries ago, and now is completely 
41 Opusce. Sci. Bologna 4: 230. 1820. 
“# Agrost. Bras. 497. 1829. 
43 Tn Schult. Mant. 2: 318. 1824. 
