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OBCHIDACEAE: HKXISEA— AMBLOSTOMA. 



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Herbae epiphgticae , paucifoliatac , per American* 



tropicam a Brasilia usque ad Mt.ricum dispcrsae, CAVLh 

 BU8 suhranwsis teretilms vel anffuialis internodio summo 

 quotannis saepius incrassato vel longe peemdobulboso ; 

 1XXOYATIOXES ad apicem pseudobulhi solitarii vdgemtni^ 

 basi squamis imbricatis obtecti apice sub racemo uni — W- 

 foliafi. Folia angusta, rigidula. RaCEMI terminates, 

 paueiflori, pedunculo brevi squamis imbricatis coriaceis 

 obtecto; pedicel I i squamis saepius longiores. F LORES 

 mediocres vel parvi, aurantiaci vel purpiwei. 



A. 



ii. 



00N8PECtUfl BPECIEIUWI HKASILIKNSU M. 



i'aulis articuli crassi, fusifoimes, sulcati; folia brevia, 



piann, linearia, apice retnsa vel emarginata 1. EL iMsEtGATs Kcichb. f. 



Caulis articuli gracilcs, subcylindrit i, Don vfl vix sulcati; 

 folia flloilfStn , subtentiuscula, supra sulcata, subulata, 

 apice acutissima 2. 11. kmi.i xa Kcichb. f. 



1. HEXISEA 1MBK1CATA Rkiciih. v. caulibus artiru- 

 latis; internodiis crassis, fusiformibus, profunde sulcatis, basi 

 squamis imbricatis; foliis brevibus, planis vel leviter concavis, 

 lineari-ligulatis, apice retusis vel emarginatis, interdum denti- 

 culo interjecto; pedunculis terminalibus, superne 8— 3-floris, 

 folio satis brevioribus; bracteis numerosis, majusculis, ovato- 

 lanceolatis, acutis, dense imbricatis; floribus mediocribus. 

 breviter pedicellatis; sepalis petalisque late lanceolatis, breviter 

 acuminatis; labello anguste ovato, breviter acuminata, basi 

 crasse bicalloso. 



Hexisea imhricata Reichh. j. in Walp. Ann. Bot. VI. 

 470 (1863). 



Diotlwnaea imhricata Lindl.l Serf. Orchid, lab. 40 fig. 1 

 (1838). et in Hook. Load. Journ. of Bot. 11.671; Duchartre. 

 Man. Gin. de* PI IV. 422. 



Euotlwnaea imhricata Reichh. j. in But. Zed. X. 772 



(1852). 



Caulks numerosi, fascieulati, erect i vel ascendentes, recti vel paulo 

 arcnati, 2—3 dm. alti ; articuli 5 — 8 cm. longi , ad medium 5—8 mm. 

 crassi, basi apiceque satis attenuati, apice unifoliati. Folia erects vel 

 erecto-patula, satis coriacea, supra longitudinaliter leviter unisulcata, 

 4 — 8 cm. longa, 6—8 mm. lata. Pkdukculus communis erectus, st rictus, 

 3 — 6 mm. longus. Bractkar rigidae, satis concavae, 7 — 10 mm. longae. 

 Florks patuli vel erecto-patuli, miniati. Skpala pktalaqik patula, leviter 

 concava, 10 — 12 mm. longa, 4 — 5 mm. lata. Lahki.lum carnosulum, leviter 

 concavum, parte libero subreflexo, 8 — 9 mm. longo, 3—4 mm. lato. 



Habitat in Guiana anglica ad rnont. Roraima altit. 1700 —2000 m.: 

 Schoniburgk. In Brasilia boreali formn adhuc invenienda. 



2. HEXISEA REFLEXA Rkiciib. f. caulibus laxe 

 articulatis, indernodiis gracillimis, cylindraceis, non vel vix 

 sulcatis, basi squamis paucis vestitis; foliis elongatis, sub- 

 teretiusculis, supra sulcatis, anguste lineari-subulatis, apice 

 acutissimis; floribus parvis, solitaries vel paucis, fasciculatis 

 vel brevissime racemosis, basi vaginis scariosis indutis; sepalis 

 anguste lanceolatis, acutis ; petalis lineari-lanceolatis, breviter 

 acuminatis, sepalo dorsali paulo brevioribus ; labello ima basi 



Orchid. II 





cum columns connato, median versus infracto, cuneato flabellato 



bilobo, rallis teniis, basin versus rotuudatis supra flexuram; 



olumna apice trilobata, lobis lateral! bus rotuudatis. 



Hexisea rertexa Reichh. /./ in Griseb. Fl Brit. W.-lnd. 

 hi. 623 (1864), et in Lkmam XLL 7.77 (1877). 



BTXFODIUM ex :i x i 1 1 is folioruin continnatnm juxta infloreacentiam. 

 Caii.ks pmici-fasciculati, erecti vel ascendentes, suhreeti vel satis arcnati, 

 B— 6 dm. alti; articuli (i — 10 cm. longi, l 1 /*— 2 mm. crassi, basi apiceque 

 DOO vel vix attenuati, apice saepius unifoliati. Folia erecta, rigida, recta 

 vel plus ininusve arcnata, 1 — 2 l /| din. longs, l'/i — 3 mm. eras**. Kuactkak 

 plures, arcfa Itlibricatae , acuta*, tenniter membranaees*, inciter 1 cm. 

 longae. PCDICILU aublil i formes , erecti, paulo arcnati, 3—7 mm. longi. 

 Skpala trnuiter nienibr.inacea, subtiliter trincrvia, 5 mm. longa, l'/tinm. 

 lata. Pktai.a 4 mm. longs, 1 mm. lata. 



Habitat inter prov. Rio do Jannro ft Mmas Gerads : liurckrll 

 n J 105 — 1 V; fti arbordms tij<irii$ Jluvii Amaiorium; J'oitrau. Etistm 

 in Surinam ad truueos arbcirw* propr Marirpas(,m : Krgd n. 149$; c<l 

 jdantatumem La IhUqcncc: WuUscJUacgel n. 560 ; in rnnula Trmitaiia: 

 Cruajcr n. 49, Fcndlcr n HI 4, Bradford ; in ins. Grenada: H. Y Sdurrintj 

 H. 306. — Floret Januario—Maio. 



XLTI. AMBLOSTOMA 8<m:ii>\v 



Amhi.(»stoma Schtidic in Otto et Dietr. Alhj. OorteHM. VI S83 



(1838); End!. Gen., SappL I 1368; Mmsrn. Pi. Vase. :ws 

 (277); Reichh. j. Xtnia Orchid, I. 1>>7, in nota, et in Walp. 



Ann. Bot VI. 485 : Benth. in Journ. Linn. Soc. L<>u<l. Hot. X VI II. 



810, rt in Bentk. et Hook. Gen. VI. III. 622; Hemd. in Qard. 



(1mm. new ser. XIX. 660 (1883); Pfttz.in Eixjl. urul Vmntl, 

 Saliirl. Vjlanzcnjam. II. C>. p. 142; Koch. Livrr de$ Orch. 264 

 RWDENIHU M sect. AMPHtQLOTTIDM § AlCBLOdTOMA Reichh. J. in 



Bonplandia II. S<j (is:,j). 



BEPALA subaoqualia, libera, (Oncava, subpatontia. 

 PETALA sepalifl angustiora sublon^iora, patcntissima. 

 LaBELU unguis eolumnae acquilongus, quacum in ur- 

 oeolum scu cupulam latam connatus; lamina tripartita, 

 lobis brevibus oblongis ; discus ad os urceoli bieristatus. 

 CoLUMNA brevis, alis cum labelli ungue urceolum for- 

 mantibus, caetcrum apoda; clinandrium breve, lobis 

 lateral ibus rotundatis, postico obsolete Anthiora inter 

 lobos laterales elinandrii terminalis, opereularis, incum- 



bens, parum convexa, transverse oblonga fere reni- 

 formis, perfectc et parallele quadrilocularis; POLUNIA 4, 

 cerca, globosa, distincta, inappendiculata, anlhera dehis- 

 ccnte per paria visco sat copioso in fila 2 elasticc 

 extensivo 'connexa et rostello saepe affixa. Capsula 

 oblongo-fusiformis , erostris, costis parum prominulis, 



Herbae epiphyticae, Amerieae tropicae australi* 

 incolae, caulibus foliatis hasi vaginalis carnoso-incras- 

 satvs. Folia angusta, tenniter coriacea, vaginis appressis. 

 PaMCULA terminalis, tenuis at rigidula, FLORIBUS 

 secus ramos confertim racemosis parvis ret minutis bre- 

 viter pedicellatis. BractEae minimac. 



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