401 ORCHIDACEAE: 
lateralibus lanceolato-spathulatis fere usque ad apicem con- 
natis basi valde gibbosis et mentum longiusculum angustum- 
que formantibus; petalis anguste obovatis, apice rotundatis, 
integerrimis, uninerviis, sepalo dorsali dimidio brevioribus; 
labello erecto, submembranaceo, petalis satis longiore, brevi- 
uscule angusteque unguiculato, anguste triangulari-subpan- 
duriformi, margine leviter undulato, apice truncato, intus 
centro pubescente, extus longitudinaliter tenuiter trilamellato; 
columna crassiuscula, ad medium satis dilatata, basi antice 
longiuscule producta, antice concavo, clinandrio latiuscule 
alato margine denticulato. 
Tabula nostra LXXXIV. Fig. I (habitus cum analysi). 
Lepanthes Yauaperyensis Barb. Rodr. in Vellosia, edit. 
sec. I. 117 (1891). 
Caves secundarii fasciculati, erecto-patuli, paulo flexuosi, laete 
virides, 2—2*/2 cm. longi, vix 1 mm. crassi; vaginae subadpressae, superne 
leviter dilatatae, fuscescentes, longitudinaliter distincte plurinervulosae, 
8—12 mm. longae. FoLivm erectum, basi concavum subconduplicatum, 
superne convexum, intense viride, 41/2—61/2 cm. longum, superne 18 ad 
20 mm. latum. Prnuxcuri communes filiformes, teretes, fulvi, Ineves, 
leviter flexuosi, 6—8 cm. longi; spatha basilaris fusea, 3—5 mm. longa. 
PeDICELLI erecto-patuli, capillares, recti vel paulo areuati, 7—10 mm. 
longi. Ovarium lineari-clavatum, rectum, 2—3 mm. longum.  S&PALA 
paulo divergentia, satis concava, flavescentia et maculis obscure pnrpureis 
notata; dorsale 9 mm. longum, 3 mm. latum; lateralia in valva apice 
minute bidentieulata 1 cm. longa 5 mm. lata connata, Perala erecta, 
membranacea, intus leviter concava, leviter obliqua, 4'/ mm. longa, 21/2 mm. 
lata. LABELLUM subplanum, 8mm. longum, apice 3'/2—4 mm. latum. COLUMNA 
erecta, paulo incurva, dorso rotundata, basi satis constricta, 5 mm. longa. — 
Species mihi non visa; descript. ex op. supra cit. et ex ic. a cl. Bars. 
Ropr. benigne communic. 
Habitat supra arbores in sylvis ad Rio Yauapery prope Chichiuahu 
prov. Amazonas: Barbosa Rodrigues. — Floret Aprili. 
6. PLEUROTHALLIS ARCUATA Liypt. caulibus 
secundariis fasciculatis, gracilibus, teretiusculis, uniarticulatis, 
folio satis brevioribus, vagina unica ampla membranacea longe. 
tubulosa glabra laevi apice oblique truncata inclusis; folio 
mediocri, submembranaceo, oblongo-subspathulato, apice ob- 
tusiusculo et saepius minute tridenticulato, inferne longe an- 
gusteque attenuato, uninervio et tenuiter multinervuloso; 
racemis solitariis, erectis, circiter usque ad medium multifloris, 
folio multo longioribus, basi spatha minuta membranacea arcte 
adpressa glabra et laevi apice obtusa inclusis; pedunculo 
communi superne fractiflexo; bracteis membranaceis, inferne 
tubulosis, superne anguste triangularibus, acuminatis, pedicellis 
satis brevioribus; floribus mediocribus, distichis, erecto-patulis, 
longe pedicellatis; sepalis tenuiter membranaceis , anguste 
lanceolatis, acuminatis, trinerviis, dorso carinatis, lateralibus 
fere usque ad apicem connatis, dorsali vix longiore et satis 
latiore; petalis late cuneatis, superne leviter obtuseque tri- 
lobatis, uninerviis, sepalo dorsali multo brevioribus; labello 
erecto, membranaceo, petalis vix longiore, longiuscule anguste 
que unguiculato, anguste ovato-cordato, indiviso, obtusinsculo, 
in centro subbilamellato; columna satis gracili, leviter in- 
curya, apice utrinque breviter alata, clinandrio postice acu- 
mínato, marginibus tenuiter denticulatis. 
Tabula nostra LXXXIV. Fig. II (habitus cum analysi). 
PLEUROTHALLIS. 402 
Pleurothallis arcuata Lindl.! Folia Orchid. Pleuroth. 
34 (1859). 
Lepanthes chrysosepala Barb. Redr. Gen. et Spec. Orchid. 
Nov. II. 44 (1882). 
Humboldtia arcuata 0. Kuntze, Rev. Gen. PI. 667 
(1891). 
Ranices fibrosae, numerosissimae, dense fasciculatae, filiformes, 
pailidae, elongatae, satis flexuosae, CAULES secundarii numerosi, erecti, 
recti vel paulo arcuati, pallide virides, tenuiter striati, 2/s—6 em. longi, 
1—2 mm. crassi; vagina arcte adpressa, nervulis longitadinalibus promi- 
nentibus notata, sordide fusca, 2-8 em. longa. Forum erectum, rigidins- 
culum, leviter concavum, basi conduplicatum, margine paulo recurvum, 
supra intense viride, subtus pallidum, 7—11 em, longum, 18—28 mm. 
latum, nervo mediano supra leviter canaliculato, subtns satis prominente, 
nervulis lateralibus utrinque vix prominentibus. Prpuxcuus communis 
gracilis, teres, pallidus, laevis, inferne rectus, 2—3 dm. longus; spatha 
basilaris erecta, vaginans, fulva, 5—7 mm. longa. Papicu erecto- 
patuli, subfiliformes, recti vel paulo arcuati, 12—14 mm, longi. Bracrear 
pedicello adpressne, falvae, plurinervalosae, 7—9 mm. longae, Ovanıum 
lineari-clavatum, leviter arcuatum, 8—4 mm. longum. Burana plus mi- 
nusve divergentia, satis concava, flavo-aurea vel albo-viridia ; dorsale pur- 
pureo-punctatum, 11 mm. longum, 2'/»—3 mm, latum; lateralia in valva 
Jateraliter compressa inferne interdum purpnreo-bistriata 10 mm. longa 
2—2'/2 mm. lata connata, PETALA erecta, carnosula, subplana, inferne 
longe attenuata, flava et purpureo-maculata, 3 mm. longa, superne 2 mm. 
lata. La»kLLUM subcondnplicatum, tenniter trinervium, basi incurvum, 
apice satis recurvum, albo-viride et purpureo-punctatum, 3!/» mm, longum, 
1'/2 mm. latum, CoLumxa erecta, basi paulo attenuata, albo-viridis, par- 
pureo-maenlata et punctata, 3 mm. longa. Carsuta pendula, oblongo- 
clavata, apice rotundata, basi acutiuscula, graciliter 6-costata fere 6-alata, 
cinerea, 15—16 mm. longa, 4—6 mm. crassa. 
Habitat in prov. Rio de Janeiro: Miers, Glaziou n. 17254 et 19885; 
in sylvis montosis prope Rodeio: Barbosa Rodrigues; ad Serra dos Or- 
gáos: Burchell n. 2109; in sylvis supra arbores prope Theresopolis : 
Schenck n. 2720, J, de Moura n. 79. — Floret Januario— Martio, 
1. PLEUROTHALLIS PRISTEOGLOSSA Hxrcup. r. 
et Warm. caulibus secundariis gracillimis, teretiusculis, 2 ad 
3-articulatis, folio satis longioribus, arcte vaginatis; folio 
parvo, carnosulo, anguste obovato, apice obtuse acutiusculo, 
basi breviuscule attenuato et acuto, uninervio, minutissime 
punctato; racemis solitariis, erectis, superne 4—b-fioris, folio 
satis longioribus, basi nudís; pedunculo communi superne 
leviter fractiflexo; bracteis membranaceis, fere usque ad 
apicem tubulosis, superne leviter dilatatis, apice oblique trun- 
catis et acutiusculis, pedicellis multo brevioribus; floribus 
satis parvis, distichis, patulis vel erecto-patulis, longe pedi- 
cellatis ; sepalis membranaceis, subaequilongis, trinerviis, dor- 
sali ovato-oblongo, obtuso, lateralibus oblongis, acutinsculis, 
fere usque ad apicem connatis, basi antice leviter gibbosis; 
petalis indivisis, lanceolatis, acutis, margine integerrimis vel 
superne vix serrulatis, uninerviis, sepalo dorsali paulo brevi- 
oribus; labello erecto, submembranaceo, petalis vix longiore, 
sessili, oblongo, indiviso, acuto, margine superne subtiliter 
serrulato, disco nudo; columna satis gracili, leviter incurva, 
apice irregulariter tridentata. 
Pleurothallis pristeoglossa Reichb. f. et Warm. ex Reichb. f. 
Otia Bot. II. 92 (1881); Warm. Symb. ad Fl. Bras. Centr. 
part. XXIX. 351. tab. 4. fig. 3. 
Humboldtia pristeoglossa O. Kuntze, Rev. Gen. PL 668 
(1891). 
