column, subrectangular-oblong, retuse or shallowly bi- 
lobed at apex, rounded at base, about 7 mm. long, 4.2- 
4.9 mm. wide, margin strongly erose; disc bicallose at 
base, traversed by three central parallel thickened nerves. 
Column very short, stout, about 8.6 mm. long. Ovary 
with a saceate vesicle at its very summit. 
Mpidendrum obliqufolium has no near allies among 
the Central American species. The general aspect of the 
plant suggests 17. Peperomia Reichb.f., a South Amert- 
Can species. 
The specimen described is in young fruit and conse- 
quently the flowers are beyond their prime and difficult 
to interpret accurately. The species, however, 1s so dis- 
tinet that it seems wise to describe it. 
Costa Rica, °° Hda. La Esperanza (la Palma).** At 1,500 meters 
altitude. December 1913. Olén Jiménez 972 (Tyrer in U.S. Nat. Herb. 
No, 1229729.) Santa Clara de Cartago. Suspended on mossy tree 
trunks. At 7,000 feet altitude. December 23,1928. C,H. Lankester 566 ; 
Provinee of Cartago, Alto de La Estrella. On tree. March 26, 27, 
1924. Paul C. Standley 39572 and 39578 (both in fruit). 
Epidendrum Parkinsonianum Hoo/:. var. fal- 
catum (Lind/.) Ames, Hubbard & Schweinfurth comb. 
NOU, 
Mpidendrum falcatum Lindley in Ann. Nat. Hist. 
4 (1840) 382. 
Mpidendrum lactiflorum A.Richard & Galeotti in 
Comptes Rend. Acad. Sci. Par. 18 (1844) 506, 512, 
nomen; in Ann. Sei. Nat. ser. 8, 8 (1845) 22. 
Mypidendrum falcatum Lindl. var. Zeledoniac Sehlech- 
ter in Fedde Repert. Beihefte 19 (1923) 87, 212. 
Certainly this variety is not specifically distinct from 
IX. Parkinsonianum. \ts claim to varietal distinction is 
based on its smaller flowers. In the typical form the lip 
from the base of the column to the tip of the mid-lobe 
is 5.5-8em. long (usually 6.5-8 em.), the sepals are 5.6-8 
[74] 
