373 ORCHIDACEAE: ONCIDIUM. 374 
oblongo-ligulato, apice abrupte acuto, disco basi crasse cal- 
loso, callo multituberculato, tuberculis longitudinaliter quadri- 
seriatis; columna brevi, satis gracili, glabra, alis patulis, 
angustis, margine leviter undulatis, basi productis. 
Oncidium nigratum Lindl.! in Paxt. Flow. Gard. I. 78 
(1851), Folia Orch., Oncid. 31; Reichb. f. in Walp. Ann. Bot. 
III. 559, VI. 751, în Gard. Chron. new ser. XIX. 790, XX. 8 
(1883); Beer, Prakt. Stud. Fam. Orch. 289; Nichols. Dict. of 
Gard. II. 488; L'Orchidoph. 1884, p. 357 (0. migreatum) ; 
Stein, Orchideenb. 422; Veitch, Man. Orch. Pl. VIII. 65 2 
Ridley in Trans. Linn. Soc. ser. 2. Bot. II. 283; Williams, 
Orch. Grow. Man. edit. 7. p. 624; Autran et Dur. Hort. Boiss. 
333; Sander, Orch. Gwide 187. 
PsEUDOBULBI superne satis attenuati, ancipites, nitidi, virides, primum 
laeves, demum utrinque costati et sulcati, 7—12 cm. longi, 2'/:—4 em. 
lati. FoLIA erecto-patula, satis concava, 12—30 cm. longa, 3—7 cm. lata, 
nervo mediano supra profunde canaliculato, subtus valde prominente; 
nervulis lateralibus numerosis, in sicco utrinque. tenuiter prominentibus. 
PEDUNCULUS communis satis flexuosus, teretiusculus, laevis, usque 3—5 cm. 
longus, 3—6 mm. crassus, ramis divaricatis, longiusculis, ramulosis. PEDI- 
CELLI patuli, filiformes, recti vel leviter flexuosi, cum ovario anguste 
lineari obtuse-trigono 1'/2—2 cm. longi. BRACTEAE adpressae, satis con- 
cavae, circiter 3 mm. longae. FLORES patentes, sepalis petalisque albis, 
maculis 2—3 transversis atropurpureis notatis. SEPALA leviter concava, 
subtiliter trínervulosa, circiter 3 mm. lata, dorsale 14—15 mm. longum, 
lateralia satis divergentia, paulo obliqua, 16—17 mm. longa. PETALA 
paulo concava, leviter obliqua, 12—13 mm. longa, 2/>—8 mm. lata. 
LABELLUM satis convexum, pallide luteum, antice purpureo-fusco vittatum, 
7 mm. longum, basi 6 mm. latum, lobo terminali tenuiter 5-nervuloso, 
2 mm. lato: COLUNNA subrecta, Pec mm. longa. CAPSULA ignota. 
| Habitat i in Guiana anglica ad mont. Roraima altit. 1700—2000 m.: 
Schomburgk, D. Burke, E. F. im Thurn n. 114. In Brasilia septentrionali 
forsan adhuc invenienda. — Floret Martio— Aprili. 
70. ONCIDIUM. PUMILUM  Lixwpr. pseudobulbis 
minutissimis fere nullis, late ovoideis, satis compressis, basi 
primum vaginis paucis parvis subcoriaceis margine scariosis 
triangulari-ovatis acutisque vestitis demum denudatis, apice 
monophyllis ; foliis satis parvis, crasse coriaceis, late oblongis, 
apice acutis, basi leviter attenuatis; pedunculo communi erecto; 
gracillimo, foliis saepius satis longiore, inferne simplici vaginis 
1—2 brevissimis subeoriaceis acutis vel obtusiusculis vestito, 
‘superne et interdum fere usque ad basin ramosissimo dense 
multifloro; -bracteis coriaceis, ovatis, acutis, ovario paulo 
brevioribus;- floribus minutissimis, brevissime pedicellatis, 
sepalis petalisque subcoriaceis, inferne patentissimis, superne 
satis incurvis; sepalis - ‘ovato-oblongis, obtusiusculis, margine 
vix undulatis, lateralibus sublongioribus usque ad basin liberis 
vel interdum basi breviter connatis; petalis late oblongo- 
subspathulatis, apice obtusiusculis, margine leviter undulatis, 
subtiliter trinervulosis, sepalo dorsali paulo longioribus; labello 
patulo, sepalis lateralibus vix longiore, sessili, utrinque glaber- 
rimo, satis latiore quam longo, basi leviter cordato, ad medium 
non-constricto, superne profundiuseule trilobato, lobis late 
triangulari-ovatis,. margine integerrimis, apice acutis satis 
incurvis, mediano paulo minore interdum obtusiusculo, sinubus 
inter lobos acutis, disco inferne usque ultra medium 4-carinato, 
carinis laevibus, per paria arcte contiguis, apice acutis satis 
divergentibus; columna brevi, satis gracili, glabra, alis anticis, 
Orchid. III. | 
brevissimis, antice truncatis, margine integerrimis; anthera 
valde convexa, laevi, superne tenuissime carinata, antice satis 
producta triangulari acuta. 
Tabula nostra LXXVIII. Fig. II (habitus cum analysi). 
Oncidium pumilum Lindl.! in Bot. Regist. XI. tab. 920 
(1825), Gen. and Spec. Orch. 205, in Hook. Lond. Journ. 
of Bot. III. 508, in Paxt. Flow. Gard. II. 132. cum icon., 
Folia Orch., Oncid. 31; Lodd. Bot. Cab. tab. 1732; Spreng. 
Syst. Veget., Cur. Post. 308; Hook. in Bot. Mag. tab. 3581; 
Drapiez, Encyclogr. Règn. Végét. I. Oncid. n. 6. cum tab. col. 
(1833), V. Juin 1837 (Bot. Mag.) fig. 6; Ch. Morren in 
L Hortic. Belg. II. 97. tab. 33 (1834); Gardn. in Hook. Lond. 
Journ. of Bot. I. 189; FI. des Serres VII. 220. fig. 11; Beer, 
Prakt. Stud. Fam. Orch. 292; Reichb. f. in Walp. Ann. Bot. 
VI. 751, in Gard. Chron. ser, 3. IV. 178 (1888); Barb. 
Rodr. Struct. des Orch. tab. 11. fig. 2; Warm. Symb. Fl. Bras. 
Centr. part. XXIX. 846; Nichols. Dict. of Gard. II. 489; 
Stein, Orchideenb. 426; Veitch, Man. Orch. Pl. VIII. 73 cum 
icon.; Chodat, Pl. Hassl. 119, in Bull. Herb. Boiss. 1901. 
p. 425; Journ. of Hort. 1903. II. 458. cum icon.; Cogn. in 
Bull. Herb. Boiss. 1903. p. 935. 
Epidendrum ligulatum Vell. Fl. Flum. Ic. IX. tab. 15 
(1827), Text. edit. Netto in Arch. Museu Rio V. 359 (1881). 
Ruizoma repens, breviusculum, robustum, flexuosum, RADICIBUS 
valde numerosis, dense fasciculatis, longiusculis, robustiusculis, tortuosis, 
canescentibus, simplicibus vel rarius paulo ramosis. PsECDOBULBI densius- 
cule aggregati, erecti vel erecto-patuli, laeves, 3—5 mm. longi, 4—6 mm. 
lati. FoLIA erecta vel erecto-patula, rigida, basi breviter subconduplicata, 
superne plus minusve concava, supra saturate viridia, subtus. paulo palli- 
diora, 5—10 em. longa, 1'/1—2'/s cm. lata; nervo mediano supra profunde 
canaliculato, subtus valde prominente; nervulis lateralibus satis numerosis, 
in sicco utrinque tenuissime prominentibus praecipue supra. PEDUNCULUS 
communis leviter flexuosus, teretiusculus, laevis, nitidus, laete viridis, 
8—15 cm. longus, */s—1'/2 mm. crassus, ramis patulis, alternis, sub- 
distichis, breviusculis, leviter geniculato-flexuosis, simplicibus vel rarius 
paulo ramulosis; vAGINAE arcte adpressae, subtiliter multistriatae, pallide 
virides, 3—4 mm. longae. PzpickLLi: patuli, filiformes, recti vel paulo 
arcnati, cum ovario 1'/—2 mm. longi. BRACTEAE subadpressae, rigidius- 
culae, satis concavae, 1—1'/: mm. longae. FLores patuli, sepalis petalis- 
que luteis et densiuscule purpureo-fusco punctatis. SEPALA leviter concava, 
basi paulo attenuata, distincte uninervulosa vel obscure trinervulosa, 
1'/4 mm. lata, dorsale 2!/;, mm. longum, lateralia paulo obliqua, 3 mm. 
longa. Perata subplana, vix obliqua, inferne paulo attenuata, 3 mm. 
longa, 1'/s mm. lata. LABELLUM satis concavum, flavum, 8—3'/s mm. 
longum, 3'/2—4 mm, latum, lobis subtiliter trinervulosis, basi 1—1!/s mm. 
latis. CoLumxa recta, 2 mm. longa, alis vix 1/2 mm. longis. CAPSULA 
erecto-patula, late ovoidea, obtuse trigona, tenuiter 6-sulcata, basi rotun- 
data, apice breviter rostrata, fuscescens, 8 mm. longa, 5—6 mm. crassa. 
Var. B. ROBUSTUM Cogn. 
Fozia oblonga, apice subabrupte acuta, basi satis attenuata, 12 ad 
19 em. longa, 2—4 cm. lata. PEDUNCULUS communis usque 20 cm. longus, 
ramis saepius satis ramulosis. 
Var. 1. ANGUSTIFOLIUM Cogn. 
FoLia anguste ligulato-oblonga, âpice acuta, basi in petiolum 
gracilem 12—15 mm. longum attenuata, utrinque intense viridia et obscure 
atroviridi maculata, 10 cm. longa, 11—12 mm. lata. PEDUNCULUS com- 
munis 1/2—?/3 mm. crassus. 
Habitat in prov. Bahia: Blanchet; in prov. Espirito Santo: 
St-Hilaire ser. B°. part. 2. n. 353; in sylvis supra arbores ad Lagoa 
48 
