3 



ORCHIDACEAE 



ISOCHILUS. 



4 



XXXIV. ISOCHILUS R.Br. 



IsocniLtis R.Br, in Ait. Hort. Kew. edit, secund., V. .209 

 (1813 } — part); Kunth in Bumb. et Bonpl Nov. Gen. et 

 Spec I. 340, Synops. I. 328 (part.); Poir. in Bid. Sc. Nat. 

 XXIV. 21 ; Spreng. Syst. Veget. III. 681 et 734, Gen. II. 671 

 (Isochilos) ; Lindl. Orch. Seel. 16, Gen. et Spec. Orch. 112 

 (part); Ritgen, Marb. II. 125 (Izochilus); Endlich. Gen. 193; 

 Meissn. PI Vase. 371 (279); Reichb. J. in Bonpland. III. 

 221 et in Walp. Ann. Bot. VI. 447; Griseb. Fl. Brit. W.-Ind. 

 Isl. 623- Benth. in Journ. Linn. Soc. Bond., Bot. XVIII. 

 312 et in Benth. et Hook. Gen. PL III. 527; Hemsl. Biol. 

 Centr.-Amer. Bot. Ill 222; Nichols. Did. of Gard. II. 201 ; 

 Pfitz. in Engl, mid Prantl, Natiirl. P/lanzen/am. II. 6. p. 140; 

 Kerch. Livr. des Orch. 264; L. Bind. Orch. Exot. 793. — 

 Leptotiiiuum Kunth, Mss. ex Steud. Nomencl. edit. sec. II. 32 

 (non Kunth, Gram. 156—1830). — Epidendri spec. Jacq. et 



Aucl. voter. 



Sepala aequalia, erccta, libera, carinato-concava, 

 basi intordum subsaccata. Petala sepalis aequilonga, 

 plana. Labellum petalis aequalc, et cum iis ad basin 

 columnae affixum sed infra medium contractum et 



gmoideo 



medium versus in lobos 



laterales brevissimos dilatatum, caeterum integrum. 

 Column a erecta, longiuscula, subteres, exalata, apice 

 ad latera stigmatis in acumina 2 erecta producta, apoda ; 

 clinandrium parum prominens, dente postico antherifero 

 breviusculo. Anthera terminalis, opercularis, incumbens, 

 convexa, distincte bilocularis ; loculis septo longitudinali 

 imperfecto bilocellatis ; pollixia 4, cerea, in quoque 

 loculo 2, aequalia, ovoideo-oblonga, parallele compressa, 

 erecta, appendicula granuloso-viscosa laminiformi a basi 

 ascendente polliniis involvente. Capsula globosa vel 

 ovoidea, costis parum prominulis. 



Herbae epiphyticae, Americae calidioris incolae. 

 Cavles e rhizomate repente vaginis obtecto erecti, foliorum 

 vaginis obtecti, pseudobulbis nullis^ Folia disticha, 

 patentia vel erecta, Unearia vel lanceolata, rigidale her- 

 bacea, saepias obtusa vel retusa. Flores mediocres, 

 rosei vel rubidi rarius albi, in racemum terminalem 

 densum unilateralem dispositi, breviter pedicellati vel sub- 

 sessiles. Bracteae herbaceae, concavae, flores satis 

 breviores. 



1. ISOCHILUS LINEARIS R.Br, caulibus numerosis, gra- 

 cillimis, undique foliatis; foliis satis parvis, erectis, linearibus, 

 apice obtusis et suboblique emarginatis, basi longe vaginatis; 

 racemis spiciformibus, sessilibus, brevibus, densifloris ; bracteis 

 arete imbricatis, aDguste obovatis, acutis, ovario paulo longi- 

 oribus; floribus parvis, subsessilibus; sepalis aequilongis, 

 acutis, dorsali libero oblongo non carinato, lateralibus trian- 



gulari-lanceolatis dorso alato-carinatis inter se inferne longius- 

 cule coalitis; petalis sepalo dorsali aequilongis, late oblongo- 

 subspathulatis, acutiusculis; labello petalis aequilongo, anguste 

 lanceolato-spathulato , acuto, inferne longe attenuate, basi 

 pulvinari-incrassato et subtiliter puberulo. 



Tabula nostra I (liabitus cum analyst). 



Isochilus linearis B.Br, in Ait. Hort. Kew. edit, secund. V. 

 209 (1813); Bot. Begist. IX. tab. 745; Spreng. Syst. Veget. III. 

 734 (Isochilos linearej; Lodd. Bot. Cab. XIV. tab. 1341; Lindl 

 Gen. and Sp. Orch. 112 (I. lineare) ; Bchb. f. in Bonplandia, 

 II. 22 et 282, III. 221, in Walp. Ann. Bot. VI. 447 , in 

 Wawra, It. Brine. Coburg. II 84, in Waivra, Beise Maximil. 

 152, Beitr. Orch. Centr.-Amer. 55 et 89; Griseb. Fl. Brit. 

 W.-Ind. Isl. 623, Symb. Fl. Argent. 337; Hemsl. Biol. Centr. 

 Amer. Bot. III. 222; Barb. Bodr. Struc. des Orch. tab. 9. 

 jig. 3; Warm. Symb. Fl. Bras. Centr. part. XXIX. 845; 

 Nichols. Bid. of Gard. II 201; Pfitz. in Engl unci Prantl, 

 Natiirl. Pflanzenfam. II. 6. p. 141. fig. 138; Stein, Orchideenb. 

 284; Kerch. Livr. des Orch. 99. fig. 60; L. Lind. Orch. Exot. 

 793; Autr. et Bur. Hort. Bom. 300. 



Helleborine tenuifolia repens, Plum. Nov. PI. Gen. 9 (1703), 

 Icon. edit. Burnt, tab. 182. fig. 1. 



Epidendrum lineare Jacq.! Select. Stirp. Amer. 221. tab. 131. 

 fig. 1 (1763), edit. pic. t. 201; Linn. Spec. edit. 2. p. 1349; 

 Swartz, Obs. Bot. 326; Andrews, Bot. Bepos. VII. tab. 445. 



Cymbidium lineare Swartz! in Nov. Act. Tips. VI. 72 

 (1799), in Schrad. Journ. Bot. II. 216; Willd. Spec. PI. IV. 

 97; Pers. Syn. PI. II 515. 



Leptotherium lineare Kunth! ex Steud. Noimncl. edit, 

 secund. II. 32 (1840). 



Rhizoma breve, raraosissimum, tortuosum, fuscum, radicibus uuoie- 

 rosis, satis gracilibus, longiusculis, flexuosis, fuscesceutibus. Caules dense 

 fascicular, erecti, recti vel leviter arcuati, teretes, laeves, pallide virides, 

 2-4 1 /* dm. alti, circiter 1mm, crassi. Folia membrauacea, recta, paulo 

 concava, laete viridia, uninervia et tenuiter multinervulosa , 2 7»— 5 cm. 

 longa, 2-3 Va mm. lata; vagiuae membranaceae, indivisae, arete adpresaae, 

 longitudiualiter tenuiter striatae , 1-2 cm. longae. Racemi erecti, recti 

 vel leviter arcuati, 2-3 cm. longi. Bracteae subscariosae , pallidae, 

 longitudinaliter tenuissime multistriatae , 6-10 mm. longae, 3—7 mm. 

 latoe. Flores erecti vel erecto-patuli. Ovarium oblougo-clavatum, alato- 

 trigonum, inferne longe attenuatum, rectum vel paulo arcuatum, 5—7 mm. 

 longum. Sepala erecta, membranacea, leviter concava, tenuiter 7-9-nervia, 

 pallide rosea, 7-10 mm. longa, 2-3 mm. lata, lateralia leviter obliqua. 

 Petala erecta, tenuiter membranacea, subplana, tenuiter 5-7-nervia, 

 inferne satis attenuata, paulo obliqua, pallide rosea, 7-10 mm. longa, 

 2 / 2 -3 mm. lata. Labellum erectum, membranaceum, leviter concavum, 

 tenuiter 3-5-nervium , roseum et ad medium atrosanguineo-maculatum, 

 7-10 mm. longum, l*/b-i«fli mm. latum. Columna recta vel paulo 

 mcurva, gracilis, apice satis incrassata, 3-5 mm. longa. Capsula erecta, 



oblonga, obtuse trigona, crasse tricostata, pallide fusca, 7-8 mm. longa, 

 o-—6 x l% mm. 





Var. p. leucanthus Cogn. 



Isochilus leucanthus Barb. Rodr. Gen. et Spec. Orchid. 



Nov. I. 47 (1877). 



roseo Jraclr l0r0b " Sti0r - F ''° BE3 maJ ° reS > 8em -P««> aibi, labello 



Minas E G^l Z T' **" * S ° r0 de Si »™ a • Martins; in prov. 



^71177 nZ'' ^^ ° alda3: Re ^ el1 -•• BL n. 1152; inter 

 BU, G,ande et D^nanHna: Burchell n. 4119; ad Lagoa Santa, epiphytic* 



