323 ORCHIDACEAE: ONCIDIUM. 324 
brevissimis, reflexis, late rotundatis, margine obsolete denti- 
culatis, lobo terminali subsessili, reniformi-subquadrangulo, 
basi truncato-subcordato, margine leviter undulato, apice 
retuso et minute apiculato, sinubus inter lobos latissimis 
rotundatisque, disco basi breviuscule crasseque cristato, crista 
lata, valde verrucosa, verruculis aliisque minutis circumstanti- 
bus; columna breviuscula, satis gracili, glaberrima, alis parvis, 
submembranaceis, anticis, late rotundatis, margine integerrimis. 
Tabula nostra LXXXVIII. Fig. I (habitus cum analysi). 
Oncidium viperinum Lindl.! Gen. and Spec. Orch. 197 
(1833), in Hook. Journ. of Bot. I. 13, Folia Orch., Oncid. 24; 
Beer, Prakt. Stud. Fam. Orch. 294; Reichb. f. în Walp. Ann. 
Bot. VI. 737; Griseb. Symb. Fl. Argent. 337; Hemsl. in Gard. 
Chron. new ser. XII. 75; Niederl. in Bol. Mus. Prod. Argent. 
III. 331 (1890); Veitch, Man. Orch. Pl. VIII. 89; Nichols. 
Dict. of Gard., Suppl. 566; Sander, Orch. Guide 194; Chodat 
et Hassl. în Bull. Herb. Boiss. 1903. p. 935. 
Oncidium | confragosum Lindl. in Bot. Regist. XXIV. 
Misc. p. 51 (1838). 
RADICES numerosae, dense fasciculatae, elongatae, graciles, satis 
flexuosae, canescentes, simplices vel leviter ramosae. PsEUDOBULBI densius- 
cule aggregati, erecti vel erecto-patuli, satis areuati vel subrecti, superne 
longe attenuáti, pallide virides, primum laeves, demum profunde multi- 
sulcati, 2!/3—4 cm. longi, 8—14 mm. lati. FoLiA erecta vel erecto-patula, 
rigidiuscula, basi breviter subconduplicata, superne plana vel paulo con- 
cava, supra saturate viridia, subtus paulo pallidiora, 6—13 cm. longa, 
1—14 mm. lata; nervo mediano supra paulo impresso subtus leviter 
prominente; nervulis lateralibus numerosis, tenuissimis, in sicco utrinque 
vix prominentibus, PEDUNCULUS communis satis flexuosus, teretiusculus, 
laevis, laete viridis, 15—20 cm. longus, 1—2 mm. crassus, ramis 2— 6, 
erecto-patulis, gracillimis, satis compressis, leviter fractiflexis, simplicibus, 
2—1 cm. longis; vAGINAE arcte adpressae, pallidae, subtiliter multinervu- 
losae, 7—10 mm. longae. PeDIcELLI patuli, subfiliformes, satis arcuati, 
eum ovario lineari teretiusculo 8—10 mm. longi. BRacTEAE adpressae, 
rigidiusculae, satis concavae, 2—3 mm. longae. FLORES nutantes, sepalis 
petalisque pallide rubro-fuscis, transverse luteo-vittatis. SkPALA leviter 
concava, basi satis attenuata, margine undulata, apice leviter incurva, 
tenuiter trinervulosa, 3 mm. lata, dorsale 7—7'/2 mm. longum, lateralia 
9 mm, longa, superne leviter divergentia. PETALA paulo concava, leviter 
obliqua, basi breviter attenuata, 8 mm. longa, 3'/s—4 mm. lata. LABELLUM 
subplanum, sulphureo-luteum, 10 mm. longum, lobo terminali distincte 
5—7-nervuloso nervulis satis ramosis, 6 mm. longo, 9 mm. lato. COLUMNA 
leviter incurva, 4 mm. longa, clinandrio postice satis producto acutoque. 
CarsuLA (imperfecte evoluta) erecta, oblonga, vix obliqua, obtuse trigona, 
basi acuta, apice leviter attenuata, circiter 2 cm. longa, 6 mm. crassa. 
Habitat supra truncos arborum emortuos solo pingui in Uruguay: 
Tweedie ; in sylvis Banda oriental: Gibert n. 794; in Paraguay in truncis 
putridis arborum Cordillera de Altos: Hassler n. 3418; in Argentinae 
Sierra de Tucuman ad Valle de Juntas prope Siambon supra arbores: 
Hieronymus et Lorentz n. 914 et 916; prope Buenos Ayres: Miers. In 
Brasilia australi forsan adhuc invenienda. — Floret Octobri— Januario. 
29. ONCIDIUM VARICOSUM .Liwpr. pseudobulbis 
majusculis, oblongis vel ovato-oblongis, satis compressis sub- 
tetragonis, basi junioribus vaginis paucis majusculis scariosis 
acutisque vestitis vetustioribus denudatis, apice diphyllis; 
foliis majusculis, subcoriaceis, lanceolato-ligulatis, apice acutius- 
culis, basi satis attenuatis; pedunculo communi satis gracili, 
nutante, foliis multo longiore, inferne simplici vaginis pluribus 
brevissimis tenuiter membranaceis acutis vel breviter acumi- 
natis remotissimisque vestito, superne leviter ramoso laxius- 
cule multifloro; bracteis brevissimis, rigidiusculis, anguste 
triangularibus, breviter acuminatis; floribus majusculis, longius- 
cule pedicellatis, sepalis petalisque tenuiter membranaceis, 
inferne patenti-reflexis, superne satis inflexis; sepalis obovato- 
oblongis, acutis, lateralibus satis longioribus, inferne usque 
ultra medium connatis; petalis late ligulatis, apice subtruncatis 
et minute apiculatis, inferne leviter attenuatis, margine satis 
undulatis, subtiliter 5-nervulosis nervulis exterioribus brevibus, 
sepalo dorsali aequilongis; labello patenti-deflexo, sepalis late- 
ralibus subtriplo longiore, sessili, supra subtiliter furfuraceo, 
subtus glaberrimo, basi profunde cordato, profunde trilobato, 
lobis margine leviter undulatis, basilaribus satis parvis, sub- 
rotundatis, terminali amplo, subsessili, late reniformi-subqua- 
drangulo, basi leviter cordato, apice angustiuscule profundeque 
emarginato, sinubus inter lobos angustis fundo subrotundatis, 
disco basi crasse cristato, crista postice tridentata fornicata 
antice cuneata varicibus venarum in posticis confluentibus 
circumdata; columna brevi, crassiuscula, glaberrima, alis latius- 
culis, anticis, subrotundatis, margine leviter undulato-sub- 
denticulatis; anthera valde convexa, laevi. 
Oncidium varicosum Lindl.! in Bot. Regist. X XIII. sub 
tab. 1920 (1837), Sert. Orch. sub tab. 48, in Journ. of the 
Hort. Soc. V. 143, in Paxt. Flow. Gard. I. 106, II. Glean. 
148, Folia Orch., Oncid. 24; Otto et Dietr. Allgem. Gartenz. 
XVIII. 349; Lemaire, Jard. Fleur. II. tab. 206—207; Beer, 
Prakt. Stud. Fam. Orch. 295; Reich). f. in Hamb. Gartenz. 
1859. p. 58, in Walp. Ann. Bot. VI. 738; Gard. Chron. new 
ser. XII. 305. fig. 49 (1879); Williams, Orch. Alb. IV. tab. 192, 
Orch. Grow. Man. edit. 7. p. 634; L'Orchidoph. 1886. p. 136; 
Nichols. Dict. of Gard. II. 491, trad. Mottel. III. 561; 
Watson, Orch. 391; Stein, Orchideenb. 430. fig. 135; Veitch, 
Man. Orch. Pl. VIII. 88. cum ic.; Bois, Orch. 162; L. Lind. 
Orch. Exot. 904; The Garden 1899. I. 408; Cogn. Dict. Ic. 
Orch., Oncid. sub tab. 18, în Bull. Herb. Boiss. 1903. p. 935; 
Sander, Orch. Guide 194. 
Oncidium Lunaeanum Hort.; Gard. Chron. 1850. p. 168. 
RADICES numerosae, dense fasciculatae, graciles, longiusculae, tor- 
tuosae, simplices vel paulo ramosae, canescenti-cinereae.  PSEUDOBULBI 
aggregati, erecti vel erecto-patuli, paulo obliqui, superne satis attenuati, 
nitidi, intense virides et interdum fusco-maculati, primum laeves demum 
profundiuseule plurisulcati, 6—10 cm. longi, 1—3 cm. lati. Forra patula 
vel erecto-patula, rigidiuscula, basi breviter subconduplicata, superne 
leviter coneava et plus minusve recurva, supra nitida et intense viridia, 
subtus paulo pallidiora, 15—30 cm. longa, 2—5 cm. lata; nervo mediano 
supra profundiuscule canaliculato, subtus satis prominente; nervulis late- 
ralibus numerosis, tenuissimis, in sicco utrinque vix prominentibus. 
PEDUNCULUS communis subrectus vel satis arcuatus, teretiusculus, laevis, 
intense viridis vel glaucescens, 8—15 dm. longus, 3—6 mm. crassus, ramis 
erecto-patulis, longiusculis, satis gracilibus, simplicibus, leviter fractiflexis; 
VAGINAE arcte adpressae, pallidae, subtiliter striatae, margine tenuiter 
scariosae, 8—18 mm. longae. PEDICELLI patuli, graciles, leviter arcuati, 
cum ovario lineari obscure trigono 2—2!/» em. longi. BRACTEAE adpressae, 
satis concavae, pallidae, 3—4 mm. longae. FLORES nutantes, sepalis petalis- 
que obscure flavis vel flavo-viridibus et transverse purpureo-fusco zonatis. 
SEPALA satis concava, margine leviter undulata, basi satis attenuata, sub- 
tiliter 3—5-nervulosa, 3!/s mm. lata, dorsale 7 mm. longum, lateralia 
10 mm. longa superne valde divergentia. PETALA paulo concava, vix 
obliqua, 7 mm. longa, superne 4 mm. lata. LaBELLUM pendulum, leviter 
convexum vel subplanum, laete luteum, basi plus minusve fusco-maculatum, 
circiter 27 mm. longum, lobis basilaribus 6—8 mm. longis latisque, Jobo 
terminali tenuiter multinervuloso nervulis dichotome satis ramosis, bilobulo 
