1 
NEW OR NOTEWORTHY ORCHIDS 
stout relatively elongate rachis clearly distinguishes it from [ 
E. ramosum Jacq. Its inflorescence resembles that of the 
habitally very dissimilar rigidum Jacq. 1 
Costa Rica, Province of Heredia, Cerros de Zurqui, j 
Northeast of San Isidro, Paul C. Standley & Juvenal Valerio 
50731, March 3, 1926. 2000-2400 meters altitude. “On 
tree; flowers pale green.” (Type in Herb. Ames No. 33492); ' 
Standley & Valerio 50724, “Flowers greenish yellow”: Prov¬ 
ince of Alajuela, Viento Fresco, Paul C. Standley & Ruben 
Torres R 48005, February 13, 1926. 1600-1900 meters al¬ 
titude. (No flowers.) 
I 
Epidendrum arcuiflorum A. & S. sp. nov. Herba 
mediocris. Caulis vaginis tubularibus omnino obtectus. 
Folia pauca, disticha, lanceolato-linearia. Pedunculus spathis 
duabus erectis ancipitibus inclusus. Racemus terminalis, 
arcuatus, densiflorus. Flores carnosi. Sepala lateralia ob¬ 
lique obovata, mucronata. Sepalum dorsale oblongo-obova- 
tum. Petala filiformia. Labellum trilobatum, lobis lat- 
eralibus semiorbicularibus, lobo intermedio lanceolate. 
Stem up to the raceme 20 to about 33 cm. high, leaf¬ 
less below, entirely concealed by sheaths, gently fractiflex, 
subterete below, complanate above. Cauline sheaths close, 
scarious and wasting into fibers on the lower portion of the 
stem, strongly ancipitous and leaf-bearing on the middle 
and upper portions. Leaves 4-6, distichous, lanceolate- 
linear, 6.3-14 cm. long, 5.5-11 mm. wide, gradually nar¬ 
rowed above with mucronate tip, slightly narrowed below 
to a clasping base, about 2-5 cm. apart, mid-nerve sulcate 
on the upper surface and sharply carinate beneath. Pe¬ 
duncle entirely or nearly enveloped by 2 long erect imbricat¬ 
ing spathes which are ancipitous, loose, 7.7-10.1 cm. long- 1 
Raceme arcuate or nodding, 8-12 cm. long, about 1.7 cm- { 
in diameter, densely many-flowered. Rachis longitudinally 
striate-sulcate. Floral bracts linear-lanceolate, up to 5 mm- 
long at the base of the raceme. Flowers small, fleshy- 
Lateral sepals obliquely obovate, 5 mm. long, about 2.6-2.9 
mm. wide above the middle, acute, dorsally carinate with 
58 
