Panama, Chiriqui. Epiphyte at 4000-5000 feet altitude. March 
1923. C.W. Powell 3227 (Referred to Powell 157). (Type in Herb. 
Ames No. 27603.) 
Dichaea gracillima C.Schweinfurth sp. nov. 
Herba_ pergracilis, silvicola. Caules caespitosi vel 
prope basim ramosi, tenues, vaginis foliorum omnino ob- 
tecti, parte basali plus minusve defoliati. Folia numerosa, 
disticha, anguste linearia, erecto-patentia, ad vaginas im- 
bricantes apice patentes articulata. Inflorescentiae nu- 
merosae, uniflorae, breves, singulae in foliorum axillis. 
Sepalum dorsale elliptico-lanceolatum, concavum, acu- 
tum. Sepala lateralia ovato-lanceolata, valde concava, 
acuminata. Petala ovato-elliptica, acuminata. Labellum 
in circuitu late obovatum, parte basali subquadrata, parte 
anteriore abrupte anchoriformi-dilatata cum auriculis 
brevibus retrorsis. 
Plant very slender, caespitose or branching near the 
base. Roots fibrous, nearly as stout as the stems (where 
naked). Stems slender, erect or arcuate, up to about 30 
cm. long, entirely concealed by imbricating leaf-sheaths 
which are leafless and waste into fibres near the base in 
old plants. Leaves articulated, distichous, numerous, nar- 
rowly linear, up to 4.7 em. long and 2 mm. wide, shortly 
acuminate and apiculate, erect-spreading, commonly con- 
duplicate below the middle. Inflorescences numerous, 1- 
flowered, solitary in the leaf-axils ; peduncles about 1 cm. 
or more long, filiform, concealed at the base by two im- 
bricating cylindrical scarious sheaths and terminating in 
a scarious shallowly infundibuliform acute bract which 
encloses a linear bracteole. Flower small, submembran- 
aceous. Dorsal sepal elliptic-lanceolate, strongly concave, 
about 5 mm. long and 2.2 mm. wide, acute, 3-nerved, 
dorsally carinate at the apex. Lateral sepals ovate-lanceo- 
late, strongly concave, asymmetric, about 5 mm. long 
and 2.5mm. wide below the middle, acuminate, dorsal- 
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