583 



ORCHIDACEAE : MENADENIUM. 



584 



- 



satis breviore, brevissime angusteque unguiculato, limbo late 

 ovato, basi leviter cordato, iudiviso vel obscure trilobato, 

 apice abrupte apiculato vel breviter acuminato, margine 

 integerrimo et leviter undulato, supra subtiliter puberulo; 

 callo in ima basi carnoso, hippocrepico , utrinque dilatato, 

 antice minute multidenticulato vel subintegerrimo; anthera 

 dorso longissime rostrata. 



■ 



Tabtila nostra CVIIL Fig. II (habitus cum analyst, sub nomine 

 Zygosepalo rostrato). 



Epidendrum labiosttm L.-C. Rich.! Cat. PI. Le Blond in 

 Act. Soc. Hist. Nat. de Paris. I. 112 (1792). 



Zygopetalum rostratum Hook.! in Bot. Mag. tab. 2819 



(1828, 



sub Zygopeialon), Cent. Orch. 56. tab. 71; Lindl. 



Gen. and Spec. Orch. 188, in Hook. Lond. Jonm. of Bot. 

 II. 672, in Bot. Regist. XXX. Misc. p. 10; Reichb. f. in Bot. 

 Zeit. X. 669; Duchartre, Man. Gen. des PI. IV. 510; Beer, 

 Beitr. Morph. and Biol. Orch. tab. 6. fig. 7 ; Wallis in III. 

 Hort. XVIII. 63 (1871); Du Buyss. LOrchid. 522; Th. Moore 

 in Orch. Alb. II. tab. 78; Lindenia II. 43. tab. 68; UOrchidoph. 

 1886. p. 167. am icon.; Watson, Orch. 513; Veitch, Man. 

 Orch. PI. IX. 61; Bois, Orch. 133; Jonm. of Hort. 1894. 



I. 7. fig. 1; Williams, Orch. Grow. Man. edit. 7. p. 763; 

 L. Linden, Orch. Exot. 991, in Journ. des Orch. V. 131; 

 Autr. et Bur. Hort. Boiss. 315 ; Sander, Reichenbachia, ser. 2. 



II. 103. tab. 91, Orch. Guide 254; Cogn. Diet. Ic. des Orch., 



Zygop. tab. 4. 



Menadenium rostratum Rafin. Fl. Tellnr. IV. 45 

 (1836). 



Zygosepalum rostratum Reichb. f.! in Nederl. Kruidk. 

 Arch. IV. 330 (1859), in Walp. Ann. Bot. VI. 666, in 

 Saunders, Refug. Bot. II. tab. 106; Stein, Orchideenb. 601. 

 fig. 184. 



Bbizoma scandens, robust urn, elongatum, viride, vaginis brevibus 

 •list ichis scariosis ovato-triangularibus breviter acuminatis pallide viridibus 

 laxe imbricatis vestitum, radicibus crassiuscnlis undulatis laevigatis 

 densissirae intricatis onustum. Pseudobulbi remotiusculi, erecti vel erecto- 

 patuli, intense virides, nitiduli, juniores laeves, vetustiores rngoso-sulcati, 

 3—4 era. longi, 2—3 cm. crassi, squamis scariosis adpressis seraivaginantibus 

 ovato-triangnlaribns acominatis dorso subcariuatis fuscescentibus vestiti. 

 Folia rigidinscnla , inferne erecta valde concava, superne plus minusve 

 recurva plana vel paulo concava, supra saturate viridia, subtus paulo 

 pallidiora, 15—25 cm. Ionga, 2V«— 4 cm. lata; nervis satis gracilibus, 

 pallidis, supra leviter impressis, subtus satis prominentibus; nervulis 

 secundariis namerosis, tenuissimis. Pedunxulus leviter arcuatus vel paulo 

 flexnosns, teres, laevis, laete viridis, 1—2 dm. longus, 2—3 mm. crassus; 

 vaginae saepius 3, subadpressae, merabrauaceae, pallide virides, 2*/* ad 



3 cm. longae. Pedicelm graciles, erecto-patuli, teretiusculi , recti vel 

 leviter arcuati, laete virides, cum ovario albido 2 1 /*— 3 cm. longi. Bracteae 

 satis concavae, tenuiter multinervulosae, subadpressae, laete virides, 3 ad 



4 cm. longae. Flores patuli vel nutantes, segraentis interdum plus 

 minusve tortis, flavo-viridibus vel pallide fuscescentibus et dilute roseis. 

 Sepala satis concava, basi paulo attenuata, subtiliter 9— 11-nervulosa, 

 circiter 5 cm. Ionga, 8—9 mm. lata, lateralia leviter obliqua. Petal a 

 tenuiter membranacea, leviter concava, basi vix attenuata, paulo obliqua, 

 circiter 4"/i cm. Ionga, 5—6 mm. lata. Labellum patentissiraum vel 

 leviter reflexura, paulo concavum vel snbplanum, subtiliter multinervu- 

 losum nervulis superne leviter ramosis, circiter 4 cm. longum et 3 l [* era. 

 latum, album, basi purpureo-pluristriatum, callo pallide violaceo. Columna 

 erecta, satis incurva, semiteres, apice valde dilatara, albida, 2y 2 cm. 

 Ionga; clinandrium late membranaceum , margine fimbriato-serrulatum. 

 Capsula pendula, oblonga, basi acuta, obtuse trigona, leviter 6-sulcata, 



5 cm. Ionga, 17 — 18 mm. crassa. 



Habitat in prov. Para secus flam. Amazonas et ad mont. Caruma 

 prope ostium flum. Rio-Tacutu: Wallis; in prov. Alto Amazonas secus 

 flum. Rio Negro: Wallis. Etiam in Guiana gallica prope Cayenne: Le 

 Blond n. 417 in herb. Deless. ; in Surinam supra arbores: Focke , Wull- 

 schlaegel n. 558; ad truncos arborum prope plant ationem Berlyn in Para: 

 Splitgerber n. 748; ad Paramaribo: Kegel; in Guiana anglica: Apptin 

 n. 847, Jenman n. 1976 et 3672; ad Demerara: Parker, Schomburgk, 

 Jenman n. 617 et 1636; secus flum. Essequibo: Schomburgk; in arboribus 

 ad Berbice: Schomburgk n. 502; in distr. Pomeroon secus flam. Barabara : 

 E. F. hn Thurn; in Venezuela: Alexander n. 6174; secus flum. Orinoco: 

 Hort Linden. — Floret Martio. 



2. MENADENIUM KEGELII Cogn. pseudobulbis 

 parvis, anguste oblongo-conicis, valde compressis, ancipitibus, 

 apice monophyllis; foliis membranaceis , anguste lanceolatis, 

 acutis vel breviter acuminatis, 5-nerviis, inferne longissime 

 attenuatis fere petiolatis; pedunculo erecto, gracili, foliis 

 multo breviore, inferne vaginis pluribus breviusculis superne 

 lineari-lanceolatis acutissimis vestito, apice unifloro; bracteis 

 subfoliaceis, anguste triangulari-lanceolatis, longe acuminatis, 

 ovario sublongioribus; floribus majusculis, breviter pedicellatis, 

 segmentis patentissimis ; sepalis carnosulis, subaequilongis, 

 anguste lanceolatis, longe acuminatis, margine non vel vix 

 undulatis; petalis anguste ligulato- lanceolatis, acutissime 

 breviterque acuminatis, sepalo dorsali paulo brevioribus; labelli 

 lamina transverse quadrata, obtusangula, medio antice apiculata, 

 callo hippocrepico, paucicrenulato ; anthera dorso longissime 

 rostrata. 



* 



Zygopetalum Kegelii Reichb. f. I in Bot. Zeit. X. 668 (1852). 



Zygosepalum Kegelii Reichb. f.! in Nederl. Kruidk. Arch. 

 I V. 330 in adnot. (1859), in Walp. Ann. Bot. VI. 666 (1863), 

 in Linnaea XLI. 128. 



Rhizoma scandens, satis gracile, elongatum, leviter flexuosum, 

 vaginis brevibus distichis scariosis late ovatis acutis vel obtusinsculis 

 pallidis laxe imbricatis vestitum, radicibus gracilibus undulatis longius- 

 culis laevigatis densissime intricatis onustum. Pseudobulbi remotissimi, 

 erecti vel erecto-patuli, recti vel satis arcuati, nitiduli, juniores laeves, 

 vetustiores leviter sulcati, 5 — 6 cm. longi, inferne 1 — l 1 /* cm. crassi, 

 squamis scariosis subadpressis vaginantibus oblongo-triangularibus acumi- 

 natis dorso subcarinatis fuscescentibus 5 — 7 cm. longis externis raulto 

 brevioribus vestiti. Folia mollia, erecto - patula , basi valde concava, 

 superne subplana, supra intense viridia, subtus paulo pallidiora, 18 ad 

 23 cm. Ionga, 3 1 /*— 4 cm. lata; nervis gracilibus, pallidis, supra leviter 

 impressis, subtus satis prominentibus; nervulis secundariis satis numerosis, 



■ 



tenuissimis. Pedunculus subrectus, teres, laevis, 6—7 cm. longus vel ultra, 



circiter 1 mm. crassus; vaginae adpressae, merabrauaceae, 1 — l x /i era. 



longae. Pedicellus gracilis, erectus, teretiusculus, rectus, cum ovario 



l 1 /* cm. longus. Bractea valde concava, subtiliter multinervulosa, sub- 



adpressa, 16—17 mm. Ionga. Flores erecto-patuli, segmentis pallide 



viridibus, fusco-maculatis. Sepala satis concava, basi leviter attenuata, 



subtiliter 7-nervulosa, 2 1 /* cm. Ionga, 4—5 mra. lata, lateralia satis obliqua. 



Petala submembranacea , paulo concava, basi vix attenuata, subtiliter 



5-nervulosa, leviter obliqua, 22 — 23 mm. Ionga, 4 mra. lata. Labellum 



album et violaceo-striatum. Columna erecta, leviter incurva, semiteres, 



apice valde dilatata, alba, l l / a cm. Ionga, alis latissimis; clinandrium late 



membranaceum, margine irregulariter denticulatum. Capsula perfecta 

 ignota. 



Habitat in Surinam prope Geiersvlyt et Tourtonne : 

 sylvis maximis umbrosis prope Mariepaston : Kegel n. 1427. — 

 septentrionali forsan adhuc invenienda. — Floret Maio. 



Kegel ; in 

 In Brasilia 



3. MENADENIUM LINDENIAE Cogn. pseudobulbis 

 parvis, ovoideis vel elliptico-ovoideis, satis compressis, apice 



