470 ORGHIDES. 



HEXISEA. 



1. HEXISEA BIDENTATA Lindl. on Cuminp Orch. in Hook B. J. 1. p. 8. 



Hab. in 1'anama et Colunabia occid. Cnmine. (hab. s. sp.) N. 1297, 

 Caules teretes, 6—8" longi. Folia 8" longa, 2V2'" lata. Flores gla- 

 berrimi, Ornithidi coccinei fere magniludine. S. et P. linearilanceolata, 

 acuta. Labellum subconforme, sed apicem versus paulo dilalalum. Auri- 

 culae columnae bidentalae. 



In tliis plant tbe petals are oftcn deiormed, so asto beeitlier abbreviated. or truncated 

 or falcate, or toothed. Their naturai form is, no doubt, such as I have described. 



2. HEXISEA IMBRICATA. Huc: Diothonaea imbricata Lindl. Sert. Orchidac. 40. n. 1. 



Caiilis articulati internodiis, fusiformibus sulcatis basi squamis imbri- 

 catis, foliis linearibus apice retusis auL emarginatis, denticulo interjecto, 

 pedunculis terrainalibns 2 — 3 fioris pariter imbricatis , iabello ovato 

 acuminato sepalis petalisque conformi, 



High mountain chain belween the 65 and 66 merid. and the 40 parall. of lat. 6— 

 7000 above the see beiween Cladonia rangiferina and reticulata common. D. differs 

 from Isochilus only in having ihe lip united lo the column by an intervening mem- 

 brane , and it bears ihe same relation to that genus as is born to Epid. by Encycl. 

 Either a dist. genus , or a mere form of Isochiius. The orrginal species collected by 

 Hall in the valley of Leon has a lip very different in form from the other divisions 

 of the perianlh and bolh have a strong double callosity at the base of the fore 

 part of the lip; in ihe true species of Isochilus on countrary the lip has either one 

 lubercie oniy at that part or none at all. Perigonium miniatum, 



Lond. Journ. 1843. IL p. 671. Lindl. Sert. t. 40. n. 1. Mountains of the Roraima 

 chain at l!;e heiglh of 5000—6000 feet. Schomburgk. 

 Euothonaea imbricata Rchb. fll. 1. c. 



3. HEXISEA OPPOSITIFOLIA. Huc : Epidendmm opposilifoliiim Rich. et Gal, Annales 

 des sc. nat. 1845. Jan. p. 21 : 



Caule erecto, bulbilormi articulato; articulis inflatis diphyllis, foliis 

 oppositis oblougo-Ianceolalis obtusis; floribus rainiatis 2— 4. terminalibus. 

 Aff. Diothonaeae imbricatae Lindl. 

 Mexico. 



Olim hacc notavi: 

 Caule erecto, articulato, arliculis fusiforraibus sulcatis, basi squamis 

 (6 — 7 )lanceolalis vestitis, diphyllis, follis ligulatis cuneatis apice retusis 

 emarginalis, tloribus lerminalibus 4 ex squamis exortis, sepalis lanceo- 

 latis aculis, tepalis minoribus, labello ligulato acuto, cum gynostemii 

 alis basi cyatheifornii , margine inde involuto , dein patente , callo 

 rotundo bicarinalo ante foveam basilarem. Flores miniati. Oaxaca N. 

 5030. Galeotli. — Euolhonaea oppositifolia Rchb. fil. I. c. 



Obs. Me judice bent dislinguuntur hae species, H. imbricaia pollet labelli lamina 

 excavata. H. bidentala et oppositifolia eandem planam gerunt. Prior habet callum 

 iransversum in carinas tres exeunlem et labclli auriculas bidonlalas. Altera vigel callo 

 rolundo bicarinato et auriculis dolabriformibus. 



Obs. Ilabeo iconem speciei insignis a Warscewiczio in ilinere primo pictam. 

 FI03 triplo major labello obovato. 



1397/5. CER.%TOSTYMS bl. 



(cf. 1485. Endl. — Bijdr. 304.) 



1. CERATOSTYLIS TERKS Rchb. fll. in Bonpl. H. p. H9 : 



aff. C. gracili Ulume perigonio extus pubescenti, tepalis aculis. 

 Appendicula teres Gi. 359. CCCXXXIIl. Caulis spithamaeus, cylindraceus, 



