mostly about 3 cm. long; bracts narrowly lanceolate, 
acute, about 8 mm. long; rachis slightly thickened, de¬ 
pressed at the base of each flower. Flowers small, about 
equalling the subtending bracts in length. Sepals lanceo¬ 
late, acuminate, carinate, 3-nerved, 6-7 mm. long, about 
3 mm. broad at the base. Petals linear-lanceolate, acute, 
1- nerved, minutely serrulate, about 4 mm. long and 1 
mm. broad. Lip strongly arcuate, about 3 mm. long and 
2- 2.5 mm. broad, very fleshy except the lateral margins 
of the disc; with two carinae which merge into a single 
carina toward the apex. Bracteole opposite the petals, 
inconspicuous, about 0.5 mm. long. Column about 2 mm. 
long, with two lanceolate apical stelidia; column-foot 
prominent, about 2 mm. long. 
Bulbophyllum Nagelii is not closely allied to any 
Mexican or Central American species of the genus but 
is perhaps closest to B.pachyrachis (A. Rich.) Grisebach, 
which it resembles somewhat in habit and in the struc¬ 
ture of the flower. Bulbophyllum Nagelii may be distin¬ 
guished from B.pachyrachis by its linear-lanceolate petals 
and from all known Mexican Bulbophyllums by the 
monophyllous pseudobulbs. 
It is indeed a pleasure to name this plant for Mr. 
Otto Nagel. Mr. Nagel, who has collected in many re¬ 
mote regions of Mexico as well as the more accessible 
areas, has doubtless collected more specimens of the 
Mexican Orchidaceae than any other man. Regardless 
of the difficulties under which he has often worked, his 
specimens have always been superlatively good. 
Mexico: on oak trees in oak-pine forest, foot of Volcano Popo¬ 
catepetl, north of Tetla del Volc£n toward Santiago, longitude 98° 
45' west, latitude 18°54' north, at about 1800 meters altitude, July 
12, 1932 and May 15, 1933, Nagel Sr Juan G. [ onzAles ] 1022 and 
2228; pine and oak forest, southwest slope of the Volcano Popocate¬ 
petl, Tetla del Volcan, Morelos, longitude 98°45' west, latitude 18 
54' north, at 1800 meters altitude, dowers dull green infused with 
[145] 
