143 ORCHIDACEAE : 
unifloris, bibracteatis; bracteis parvis, carnosulis, ovato- 
triangularibus, acutis, basi semiamplexicaulibus; floribus 
mediocribus, pendulis, segmentis patulis; sepalis carnosulis, 
cuneato-oblongis, apice obtusiusculis et minute apiculatis, late- 
ralibus paulo longioribus et angustioribus; petalis late oblongis, 
obtusis, tenuiter 7-nervulosis, sepalo dorsali aequilongis; 
labello carnosulo, sepalis lateralibus dimidio longiore, supra 
subtiliter papilloso-velutino, breviuscule lateque unguiculato, 
unguiculo basi cum columna brevissime connato, limbo obtuse 
quadrangulo, panduriformi, apice leviter emarginato, margine 
tenuiter vel obscure denticulato, disco inferne leviter incras- 
sato breviuscule 6-carinato, carinis triangularibus exterioribus 
brevioribus, calcari gracili, obtusiusculo, paulo flexuoso, quam 
pedicellus subdimidio breviore; columna crassa, brevissima, alis 
erectis, elongatis, dolabriformibus, obtusis, margine minute 
crenulato - denticulatis; anthera valde convexa, subtiliter 
puberula. 
Trichocentrum cornucopiae Lind. et Reichb. f.! ex Reichb. f. 
in Gard. Chron. 1866. p. 266, in Saund. Ref. Bot. II. tab. 77; 
Nichols. Dict. of Gard. IV. 79; L. Lind. Orch. Exot. 968. 
RuizoMA breve, robustissimum, RADICIBUS satis numerosis, robustis, 
breviuscnlis, leviter flexuosis, simplicibus, albescentibus. PSEUDOBULBI 
aggregati, plus minusve patuli, unisulcati, virides, 1/2—1 cm. longi. FOLIA 
rigida, patula vel plus minusve reflexa, leviter concava vel subplana, supra 
intense viridia, subtus paulo pallidiora, 7—12 cm. longa, 2—3 cm. lata; 
nervo mediano supra profundiuscule canaliculato, subtus valde prominente; 
nervulis lateralibus satis numerosis, in sieco utrinque paulo prominentibus. 
PEDUNCULI teretiusculi, virides, 1—2'/s cm. longi, 2—2'/ mm. crassi. 
PEDICELLI robustiusculi, teretes, pallide virides, cum ovario lineari-clavato 
tenuiter 6-sulcato subrecto albo-fluvescente 3—4 cm. longi. BRACTEAE 
adpressae, satis concavae, pallide virides, 6—8 mm. longae. SEPALA 
rigidiuscula, leviter concava, basi breviuscule attenuata, tenuiter 5 —T- 
nervulosa, albo-flavescentia, dorsale 10—12 mm. longum et 4—5 mm. 
latum, lateralia leviter obliqua, dorso obscure carinata, 12—14 mm. longa, 
3—4 mm. lata, PETALA submembranacea, leviter concava, basi breviter 
attenuata, paulo obliqua, albo-flavescentia, 12—14 mm. longa, 5—6 mm. 
lata. LABELLUM erecto-patulum, rigidiusculum, leviter concavum vel sub- 
planum, margine leviter undulatum, crassiuscule plurinervulosum, 18 ad 
19 mm. longum, 10—11 mm. latum, album, disco flavo-sulphureo, carinis 
aurantiaco-rubris; calcar albo-flavescens, circiter 2 cm. longum, basi 21/2 ad 
3 mm. crassum. CoLumna albescens, 5 mm. longa, alis rigidis, albis et 
purpureo-punctatis, 4—5 mm. longis, 3 mm. latis. CarsuLA ignota. 
Habitat in sylvis supra arbores secus flum. Rio Negro prov. Alto 
Amazonas: Wallis. 
7. TRICHOCENTRUM PURPUREUM Lmpt. pedun- 
culo brevissimo, unifloro vel interdum bifloro, 3— 4-bracteato; 
bracteis parvis, triangulari-ovatis, breviuscule acuminatis, basi 
amplexicaulibus, laxe imbricatis; floribus mediocribus, pendulis, 
segmentis patentibus; sepalis subaequilongis, late oblongis, 
acutis, lateralibus subfalcatis; petalis obovato-oblongis, sub- 
abrupte acutis, sepalo dorsali paulo brevioribus; labello sessili, 
sepalis lateralibus dimidio longiore, obovato-subquadrato, basi 
breviter lateque cuneato, apice leviter emarginato, margine 
integerrimo obscure undulato, callis 2 linearibus obtusis ad- 
jecto minore utrinque juxta apicem dentibus totidem juxta 
basin glabris, calcari crasso, obtuso, subfalcato, quam pedicellus 
paulo breviore; columna crassa, brevissima, alis erectis, majus- 
culis, late oblongo-dolabriformibus, obtusiusculis, margine 
minute denticulatis; anthera valde convexa. 
TRICHOCENTRU M. 
144 
Trichocentrum purpureum Lindl. | in Gard. Chron. 1854, 
p. 772; Reichb. f. în Walp. Ann. Dot. VI. 545; Nichols. 
Dict. of Gard. IV. 79. 
PSEUDOBULBI . FOLIA .... PEDUNCULUS teretiusculus, circiter 
1 em. longus, PEDICELLI satis graciles, recti, cum ovario lineari-clavato 
2—2'/2 em. longi. BRACTEAE erecto-patulae, valde concavae, 4-6 mm. 
longae. SEPALA PETALAque paulo concava, basi satis attenuata; sepala 
12—13 mm. longa, 4—5 mm. lata, lateralia satis obliqua; petala vix 
obliqua, 10—12 mm. longa, 5—6 mm. lata. LABELLUM patenti-deflexum, 
subplanum, purpureum, 15—16 mm. longum, circiter 1 cm. latum; calear 
16—17 mm. longum, basi 2'/h—3 mm. crassum. COLUMNA 4-5 mm. 
longa, alis 5—6 mm. longis. CaPsULA ignota. — Species imperfecte cognita. 
Habitat in Guiana anglica ad Demerara: Hort. Veitch. In Bra- 
silia septentrionali forsan adhuc invenienda. 
8. TRICHOCENTRUM FUSCUM Luinpt. pseudobulbis 
minutis fere nullis; foliis majusculis, crasse coriaceis, oblongis, 
apice acutiusculis, basi in petiolum brevem attenuatis, subtus 
leviter carinatis; pedunculo brevi, satis gracili, patenti vel 
deflexo, 1— 4-floro; bracteis parvis, coriaceo-carnosis, ovatis, 
acutis, basi amplexicaulibus; floribus mediocribus, nutantibus 
vel pendulis; sepalis carnosulis, patulis, subaequilongis, late 
oblongis, acutis; petalis obovato-oblongis, apice subrotundatis 
et minute apiculatis, tenuiter 7-nervulosis, sepalo dorsali 
paulo brevioribus; labello carnosulo, sepalis lateralibus dimidio 
longiore, sessili, supra subtiliter furfuraceo-puberulo, obovato- 
oblongo, subpandurato, basi late cuneato cum columna brevius- 
cule connato, margine integerrimo et obscure undulato, apice 
profundiuscule emarginato, disco inferne fere usque ad medium 
bilamellato, calcari gracili, obtusiusculo, leviter flexuoso vel 
subrecto, quam pedicellus subdimidio breviore; columna brevis- 
sima, crassa, alis erectis, majusculis, obovatis, obtusiusculis, 
margine serrulatis; anthera glabra, hemisphaerica. 
Trichocentrum | fuscum | Lindl.! in Bot. Regist. XXIII. 
tab. 1951 (1837); Drapiez, Encyclogr. Regn. Végét. V. April. 
1837 (Bot. Reg.) fig. 8; Hook. in Bot. Mag. tab. 3969; Beer, 
Prakt. Stud. Fam. Orch. 316, Beitr. Morph. Orch. tab. 4. 
fig. 44, tab. 7. fig. 3 et 17; Reichb. f. in Walp. Ann. Bot. 
VI. 545; Hemsl. Biol. Centr-Amer., Bot. III. 271; Warm. 
Symb. Fl. Bras. Centr. part. XXIX. 846; Nichols. Dict. of 
Gard. IV. 79; Stein, Orchideenb. 574; Veitch, Man. Orch. 
Pl. IX. 169; Williams, Orch. Grow. Man. edit. 7. p. 730; 
Sander, Orch. Guide 237. 
Acoidiwm | fuscum Lindl. in Bot. Regist. XXIII. sub 
lab. 1951 (1837). 
Rapices longiusculae, satis graciles, leviter flexuosae, simplices, 
albidae, PseupoBuLBI patuli, ovoideo-oblongi, vix !/a—1 cm. longi. FOLIA 
rigida, patentissima vel plus minusve recurva, leviter concava, supra intense 
purpureo-viridia et saepius minute fusco-purpureo maculata, subtus paulo 
pallidiora, 7—13 cm. longa, 2—3"/2 cm. lata; nervo mediano supra pro- 
funde canalieulato, subtus valde prominente; nervulis lateralibus satis 
numerosis, in sicco utrinque paulo prominentibus; petiolo robusto, teretius- 
culo, supra leviter canaliculato, !/s—1 cm. longo. PepuncuLUS teretius- 
culus, flexuosus, intense viridis, 2—4 cm. longus. PrpicELLI graciles, 
erecto-patuli, teretiusculi, paulo flexuosi, viridi-flavescentes, cum ovario 
lineari-subclaviformi 2Y:—4 em. longi. BRACTEAE erecto-patulae, rigidae, 
valde concavae, pallide virides, 5—7 mm. longae. SrpALA rigidiuscula, 
leviter concava, basi satis attenuata, subtiliter 7-nervulosa, purpureo- 
viridia, 13—15 mm. longa, 4—5 mm. lata; lateralia subfalcata. PETALA 
