581 



ORCHIDACEAE : ZYGOPETALUM— MENADENIUM. 



582 



superne laxe 3— 4-floro; bracteis snbcoriaceis, ovato-triangu- 

 laribus, acutis, dorso subcarinatis, ovario subdimidio brevi- 

 oribus; floribus majusculis, breviuscule pedicellatis, segmentis 

 patulis, apice paulo recurvis; sepalis carnosulis, subaequi- 

 longis, lanceolatis, aeutissimis, lateralibus satis obliquis, sub- 

 horizontaliter patentibus; petalis lanceolato-ligulatis , acutis, 

 sepalo dorsali vix brevioribus; labello submembranaeeo, sepalis 

 lateralibus aequilongo, intus dense velutino, indiviso, obovato- 

 subdeltoideo , basi longiuscule cuneato et utrinque minute 

 auriculato, margine integerrimo vix undulato, apice leviter 

 emarginato; callo linguiformi , tumido, elongate adpresso, 

 indiviso, puberulo, venoso, ad medium bicostato, margine 

 integerrimo; columna longiuscula, claviformi, crassiuscula, 

 antice leviter puberula, margine superne utrinque brevi- 

 ter alata. 



Tabula nostra C VII. Fig. I (habitus). 



Zygopetalum Mosenianum Barb. RodrJ Gen. et Spec. 

 Orch. Nov. I. 108 (1877). 



Zygopetalum caulescens Iiolfe! in Gard. Chron. ser. 3. 

 VII. 5U (1890); Jo urn. des Orch. I. 133, II. 126, V. 131; 

 L. Lind. Orch. Exot. 991. 



Radices numerosae, longiusculae , crassiusculae , teretes, leviter 

 .flexuosae, siraplices, canescentes. Caulis simplex, teres vel paulo com- 

 pressus, creberrime articulatus, strictus vel paulo flexuosus, inferne vaginis 

 foliorura vetustiorum marcescentibus dense iuibricatis tectus, 2 — 6 dm. 

 longus, 8 — 14 mm. crassus. Folia patula vel ereclo-patula, superne leviter 

 recurva, rigidiuscula, inferne valde concava fere conduplicata , superne 

 leviter concava, supra intense viridia, subtus satis pallidiora, 8—17 cm. 

 longa, 1 — 3 cm. lata; nervis satis gracilibus, supra paulo impressis, subtus 

 pallidis valde prominentibus ; nervulis secundariis numerosis, gracillimis. 

 Pedunculus communis leviter compressus, laevis, pallide viridis, leviter 

 flexuosus, 15—30 cm. longus, l l /i — 3 cm. crassus; vaginae subadpressae, 

 laeves, pallide virides, l 1 /* — 2 cm. longae. Pedicklu erecto-patuli, 

 robustiusculi, paulo compressi, leviter flexuosi vel subrecti, pallide virides, 

 cum ovario 2 1 /i — 3 cm. longi. Bracteae rigidiusculae , subadpressae, 

 valde concavae, tenuiter multistriatae, pallide virides, cum ovario l*/i ad 

 2 cm. longae. Flores patnli vel subnutantes, segmentis albo-viridibus 

 et castaneo-fusco maculatis. Sepala rigidiuscula, leviter convexa, inferne 

 paulo attenuata, tenuiter 7-nervulosa, 23 — 25 mm. longa, 6—7 mm. lata. 

 Petal A submembranacea, paulo convexa, inferne satis attenuata, leviter 

 obliqua, subtiliter 5— 7-nervulosa, 22—23 mm. longa, 5—6 mm. lata. 

 Labellum patenti-reflexum, planum vel paulo convexum , tenuiter multi- 

 nervulosum nervulis satis ramosis, album et violaceo-lineatum, 25 — 26 mm. 

 longum, superne 16—20 mm. latum. Columna erecta, leviter incurva, 

 acutiuscule trigona, inferne satis attenuata, 12 — 13 mm. longa. Capsula 

 perfecta ignota. 



Habitat in prov. S. Paulo prope Santos; Mosen n. 3227 ; in arbori- 

 bus et in rupibus ad Serra dos Orgdos prov. Rio de Janeiro: Glaziou 

 n. 3632; prope Therezopolis in cacumine Serra das Araras: J. de 

 Moura n. 73; in Brasilia loco accurato haud indicato: Mendon^a n. 

 968. — Floret Januario—Maio. 



LXXXV. MENADENIUM Safin. 



Menadenium Bafin. Fl. Tellur. IV 45 (1836). 



Zygo- 



sepalum Eeichb. f. in Nederl Kruidk. Arch. I V. 330 (1859), 

 in Walp. Ann. Bet. VI. 665 (1863); Pfitz. in Engl, und 

 Prantl, Naturl. Pflanzenfam. It 6. p. 171; Stein, Orchideenb. 



601; Kerch. Livre des Orch. 268. 



Zygopetalox sect 



Zygosepalon Reichb. f. in Bot. Zeit. X. 668 (1852). 

 Zygopetalum sect. Zygosepalum Benth. in Journ. Linn. Soc. 



Orchid. II. 



Loml, Bot. XVIII. 320(1881), in Benth. et Hook. Gen. PI. III. 

 643; Vvitch, Man. Orch. PI. IX. 41; Cogn. in Journ. des 



Orch. II, 338. 



Sepala subaequalia, angusta, patentia, libera, 

 lateralis pedi brevi columnae affixa. Petala sepalis 

 similia. Labellum pedi columuae afftxum, cui breviter 

 incumbens, mentum brevissime format, latum, patens, 

 explanatum, late ovatum, indivisum vel obscure trilo- 



transversa 



incurva 



integra vel paucicrenulata instructus. 

 semiteres, apice utrinque obtusangulo-dilatata, basi in 

 pedem brevem producta; clinandrium magnum, obli- 

 quum, subcucullatum, membranaceum, fimbriato-lacerum, 

 lobis lateralibus sou alis columnae rotundatis integris. 

 Antiiera intra marginem clinandrii affixa, opercularis, 

 incumbens, bilocularis, dorso longe rostrata; pollinia 

 quaterna, cerea, obovoidea, per paria in loculis segre- 

 gata, inappondiculata, anthera dehiscente in glandula 

 rostelli stipiti lato affixa. Capsula oblonga, erostris. 



Herbae epiphytkae, lirasiliae septentrional is et 

 Guianae incolae, caulibus 

 vaginatis demum in pseudoi 



foliatis 



incrassatis. Folia 



pauca, submembranacea, plicato-venosa. SCAPI florifer 

 aphyUi, ad basin pseudobulborum erecti, plurivaginati 



bifi 



Flores speciosi. Bracteae 



angustae. 



CONSPKCTUS SPECIEUUM. 



I. Pedunculus erectus vel ascendens, saepiasime uniflorus; bracteae ovario 

 sublongiores ; labellum apice apiculatum; authera longissime roHtrata. 



A. Pseudobulbi ovoideo-oblongi; flores magni ; labellum 

 late ovatum, callo antice multidenticulato vel sub- 

 integerrirao 1. M. labiosum Cogn. 



B. Pseudobulbi anguste oblongo-conici ; flores mediocres; 

 labellum transverse quadratum, callo paucicrenulato 



2. M. Keg eli i Cogn. 



II. Pedunculus nutans, saepissime 2 — 3-florus; bractea© 

 ovario dimidio breviores; labellum longiuscule acumi- 

 natum; anthera longiuscule rostrata ... 3. M. Lindenue Cogn. 



1. MENADENIUM LABIOSUM Cogn. pseudobuibis 

 satis parvis, ovoideo-oblongis, valde compressis, ancipitibus, 

 apice mono— diphyllis; foliis papyraceis, ligulato-lanceolatis, 

 breviter acuminatis, 5— 7-nerviis, inferne longe attenuatis 

 fere petiolatis; pedunculo ascendente, robustiusculo, foliis satis 

 breviore, inferne vaginis pluribus majusculis subfoliaceis 

 acuminatis vestito, apice unifloro vel interdum bifloro; bracteis 

 foliaceis, ovato- lanceolatis, longiuscule acuminatis, ovario 

 paulo longioribus; floribus magnis, breviuscule pedicellatis, 

 segmentis patentissimis apice plus minusve recurvis; sepalis 

 membranaceis, subaequilongis, anguste lanceolatis, longi 

 acuminatis, margine leviter undulatis; petalis lineari-lanceo- 

 latis, longe acuminatis, margine satis undulatis, sepalo dorsali 

 paulo brevioribus; labello membranaceo, sepalis lateralibus 



74 



