Megadinium.] cxxxiii. orchide.e (rolfe). 39 



long, broadly winged ; apex with two minute teeth. — Ridl. in Journ. 

 Bot. 1886, 292. M. purpuratum, Lindl. in Journ. Linn. Soc. vi. 128 ; 

 Bot. Mag. t. 5936. 



Upper Guinea. Sierra Leone, Smeathman ! Afzelins ! Niger Delta : Brass 

 River, Barter, 1854 ! 



Ziower Guinea. Island of St. Thomas, at Angolares, Quintas, 9 ! 



Lindley unfortunately transferred the name M. maximum to another species (see 

 note under M. Lindleyi, Rolfe) and afterwards redescribed the present one as 

 M. purpuratum. Barter records the flowers and whole spikes as purple, but in the 

 Botanical Magazine figure both are light green with purple markings. 



6. M. oxjrpterum, Lindl. in Bot. Reg. 1839, Misc. 14. Rhizome 

 stout. Pseudobulbs distant, oblong, acutely 4-5 -angled, 1^-2 in. long, 

 2-leaved. Leaves oblong, obtuse, coriaceous, 3-4 in. long, 8-16 lin. 

 broad. Scapes |-1 ft. long, with several tubular-spathaceous sheaths ; 

 rhsLchis ensitorm or linear -oblong, narrowed above, somewhat thickened 

 and coriaceous, 3J-4 J in. long, 5-7 lin. broad. Bracts triangular-ovate, 

 acute, ultimately reflexed and the margins recurved, 2 lin. long. 

 Flowers 2-3 lin. apart, yellow. Pedicels short. Dorsal sepal ovate- 

 lanceolate, acuminate, concave, 2J lin. long; lateral ones broadly 

 ovate, acuminate, concave, 2 lin. long ; all nearly straight. Petals 

 falcate-linear, acute, 1 J-1 J Hn. long. Lip linear oblong, subobtuse, from 

 a broader denticulate base, 1 lin. long. Column h Hn. long, broadly 

 winged; teeth short, obtuse. — Lindl. in Journ. Linn. Soc. vi. 128. 

 Butbophyllum oxypterura^ Reiehb. f. in Walp. Ann. vi. 258. 



Upper Guinea. Sierra Leone, Loddiges, cultivated specimen ! 

 Ibower Guinea. Princes Island, Barter, 2026 ! 

 Closely allied to the preceding, which it much resembles. 



7. M. imschootianum, Rolfe in Keio Bulletin, 1895, 8. Pseudo- 

 bulbs acutely triangular, oblong, If in. long, 8 lin. broad, 1-leaved. 

 Leaves linear-oblong, obtuse, 6 in. long, 1^ in. broad. Scape lU in. 

 long, with several sheaths towards the base; rhachis linear-oblong, 

 acute, thin, 5-6 in. long, 7-8 lin. broad ; margin obscurely crenulate. 

 Bracts ovate-oblong, acute, 21-3 lin. long, at length reflexed, their 

 margins very soon recurved. Mowers 3-4 lin. apart. Pedicels l|-2 lin. 

 long. Dorsal sepal lanceolate-oblong, very acuminate, 5 lin. long; 

 lateral ones ovate, very acuminate, 4 lin. long, 2h lin. broad ; apex 

 reflexed. Petals falcate-lanceolate, shortly acuminate, Ij lin. long. 

 Lip recurved, fleshy, linear-oblong, obtuse, minutely serrulate below the 

 middle, 2 lin. long. Column short, very broadly winged, with two 

 minute teeth near the apex. 



Habitat unknown, but probably some part of West Tropical Africa. It flowered 

 in the collection of M. A. Van Imschoot in 1895. 



8. M. velutinum, Lindl. in Bot. Reg. 1847, sub t. 32. Pseudo- 

 bulbs ovate, triangular. Leaves oblong-lanceolate, emarginate. Scape 

 5 in. long, with several tubular basal sheaths ; rhachis linear-oblong, 

 subacute, obscurely crenulate, thin, minutely scaberulous, 3J in. long, 



