that credited to M. Abelei, is about 2.1 em. long and 1.2 
em. wide across the expanded lateral lobes; and _ finally 
the column is about 1.6 em. long (contrasted with 1.1 
em. long in M. Abelez). 
Although the pseudobulbs of AZ. rufescens are almost 
always crowded or approximate, I have seen one Peru- 
vian collection (Dept. of Loreto, G. Klug 10020) which 
has the pseudobulbs 2 to 8 em. distant. 
Including its various forms, Maaillaria rufescens oc- 
curs from British Honduras and Guatemala to Costa 
Rica, in the West Indies and in South America south 
to Brazil and Peru (Prov. Loreto). 
Maxillaria Tafallae (Reichb.f:) C. Schweinfurth 
comb. nov. 
Scaphyglottis Tafallae Reichenbach filius in Linnaea 
22 (1849) 855. 
Ornithidium Tafallae Reichenbach filius in Bonpl. 2 
(1854) 18. 
Ornithidium dichotomum Schlechter in Fedde Repert. 
Beih. 7 (1920) 178: ex Mansfeld in Fedde Repert. 
Beih. 57 (1929) t. 68, nr. 245. 
‘Two recently examined collections from the Depart- 
ment of San Martin in Peru are undoubtedly referable 
to Ornithidium Tafallae (described as Scaphyglottis Ta- 
fallae) which is represented in the Ames Herbarium by 
aseries of drawings with a floral analysis from the Reich- 
enbach Herbarium in Vienna. Apparently the only dif- 
ference is that Reichenbach’s drawing shows a sharply 
three-lobed anterior portion of the lip (described as ob- 
tusely three-lobed), whereas the Peruvian specimens have 
at most an obscurely 3-lobulate apical portion. The Peru- 
vian collections show that the species is a large sprawling 
plant with unifoliate pseudobulbs at intervals of 1 to 19 
cm. surrounded on each side by one or two pairs of leaf- 
[ 288 ] 
