NEW OR NOTEWORTHY ORCHIDS 
ing in semiorbicular lobes; anterior portion or middle lobe 
suborbicular, about 8-11 mm. long and wide, central part 
thickened especially beneath, margins undulate. Disc with 
a linear central thickening at base terminating near the 
middle in a prominent acute angle, lower middle portion pu¬ 
bescent on the inner surface. Column arcuate, 1 cm. long, 
extended into a foot which is about 5 mm. long. 
Maxillaria angustisegmenta is allied to M. Brenesii 
Schltr., but it has much larger flowers and long slender 
petioles. 
The description was prepared from dried specimens. 
Costa Rica, Bosque de Aguileo en La Palma, A. M. 
Brenes {132) 462, November 18, 1922. 1190 meters altitude. 
(Type in Herb. Ames No. 31158): Province of Cartago, 
Vicinity of Pejivalle, Paul C. Standley & Juvenal Valerio 
47197, February 7-8, 1926. About 900 meters altitude. 
“On tree; flowers pale yellow; lip with dark red spots at 
base.” 
Maxillaria arachnitiflora A. A: A. sp. nov. Herba 
valida, caespitosa. Pseudobulbi monophylli, cauliformes. 
Folia oblongo-elliptica, prominenter petiolata. Inflores- 
centiae valde numerosae, uniflorae, quam folia multo bre- 
viores. Flos grandis, sepalis patentibus. Sepala lineari- 
lanceolata, valde attenuata, mento prominent!. Petala 
sepalis simillima sed breviora. Labellum prope apicem 
leviter trilobatum, per partem basalem callo excavato 
ornatum. 
Plant stout, caespitose, up to 38 cm. tall to the tip of 
the longest leaf. Roots fibrous, flexuous, glabrous, numer¬ 
ous. Pseudobulbs monophyllous, cauliform, complanate- 
oylindric, appearing merely as a continuation of the stout 
petiole, up to 4.5 cm. long, surrounded by distichous ancip- 
itous leaf-bearing sheaths. Leaf petioled; lamina oblong- 
elliptic, 14-23 cm. long, 3.4-5.2 cm. wide, acute or subacute, 
ouneate-narrowed at base, coriaceous, mid-nerve more or 
less sulcate above and conspicuously carinate beneath; 
petiole 4.5-10 cm. long, conspicuous, conduplicate. In- 
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