Mexico, Oaxaca, fleures jaunes, en Mai. Sur les chénes des dis- 
tricts caleaires 4 7800 ft., 1840. Galeotti 5073 (Tyrer in Herb. Reichen- 
bach); Oaxaca, Sierra, 7,000 feet altitude, Galeotti 5326: State of 
Guerrero, Ojo de Agua in mountains near Mochitlan, in oak forest. 
June 20, 1932. Erik M. Ostlund 823 (Collector Juan G.). 
Epidendrum tenuissimum Ames, Hubbard & 
Schwemfurth, sp. nov. 
Herba gracillima, epiphytica. Radices paucae, cras- 
sae. Pseudobulbus ellipsoideus, prope apicem in collum 
angustum plurifoliatum contractus. Folia angustissime 
linearia. Inflorescentia folia subaequans, laxe pauciflora. 
Pedunculus filiformis. Flores membranacei. Sepala el- 
liptico-lanceolata. Petala lineari-oblanceolata. Labellum 
prope apicem columnae adnatum, simplex, spathulato- 
oblongum, apice rotundatum; discus fascia mediana ver- 
rucosa percursa, utrinque carinis tribus humilibus cren- 
ulatis ornatus. Columna superne valde dilatata, apice 
trilobata. 
Plant very slender, up to 15.4 em. tall including the 
inflorescence. Roots few, fibrous, short, stout, glabrous. 
Pseudobulb ellipsoid, up to about 2.2 cm. long, covered 
by fibrous remains of sheaths, rugose in the dried speci- 
men, contracted into a short caulescent neck which bears 
two to several leaves. Leaves narrowly linear, 8-10.7 cm. 
long, about 1.5—2 mm. wide (sometimes conduplicate), 
obtuse or subacute. Inflorescence equalling or exceeding 
the leaves, racemose or subpaniculate, few-flowered (three 
or four). Peduncle up to the raceme filiform, about 
7.5-8.5 em. long, concealed below by about two closely 
imbricating tubular scarious evanescent sheaths and pro- 
vided above with two shorter remote tubular evanescent 
sheaths. Bracts of the inflorescence inconspicuous, small, 
scarious, amplexicaul. Flowers medium-sized but large 
for the plant, membranaceous. Lateral sepals oblong- 
lanceolate, 8.8-9.8 mm. long, about 2—2.5 mm. wide, 
[15 ] 
