NEW OR NOTEWORTHY ORCHIDS 
The specific name was suggested by the form of the 
perianth. 
The description was drawn from a dried specimen to¬ 
gether with flowers preserved in formalin. 
Costa Rica, Navarro (flowered at Las Concavas, Au¬ 
gust 1928), C. H. Lankesier 1212. 4000 feet altitude. “Se¬ 
pals wax yellow (Ridgway XVI), petals white, lip lemon 
yellow, front of column and stigmatic surface maroon, an¬ 
ther-cap ochraceous orange.” (Type in Herb. Ames No. 
34212.) 
Maxillaria attenuata A. & S. sp. nov. Herba parvula, 
caespitosa. Pseudobulbi complanato-cylindracei, mono- 
Phylli, in apice obliqui. Folia petiolata; lamina oblongo- 
elliptica. Inflorescentiae uniflorae, longipedunculatae, folia 
paulo superantes. Pedunculi pluribracteati. Flos compar- 
ate magnus, nervosus. Sepala lateralia et petala falcata, 
triangulari-linearia, acuminata. Sepalum dorsale triangu- 
lari-lineare, acuminatum. Labellum expansum elliptico- 
lanceolatum, supra medium leviter trilobatum, lobo inter- 
Riedio lanceolato-triangulari. 
Plant small, caespitose, 7.5-10 cm. high. Roots fibrous, 
filiform, flexuous, glabrous. Pseudobulbs complanate-cylin- 
dric, up to 1 cm. long, monophyllous, very oblique at the 
apex, finely rugose in the dried specimen, clothed at base 
'With 1 or more evanescent leaf-bearing sheaths. Leaves 
rather long petioled; lamina elliptic-oblong, up to 4.5 cm. 
long and 11 mm. wide (immature leaves much smaller), 
apparently complicate-acute, cuneate at base, mid-nerve 
conspicuously sulcate above and carinate beneath, sub- 
coriaceous in anthesis; petiole up to 11 mm. long, condu- 
Plicate or deeply channeled. Scapes surpassing the leaves, 
1-flowered, issuing from the base of the pseudobulbs, flex- 
nous-suberect. Peduncle up to the pedicellate ovary about 
fi~6-9 cm. long, provided with 5-6 loose tubular sheaths 
■which are short and imbricating at base, long and subremote 
nbove. Floral bract similar to the cauline sheaths, sub- 
cqualing the pedicellate ovary which much surpasses it in 
89 
