Tap; 78Li. 
ME GACLINIUM tevcornmacuts. 
Native of Lagos. 
Nat. Ord. OrcHipEz.—Tribe EpIpENDRE. 
Genus Mxcaciinium, Lindl.; (Benth. §& Hook. f. Gen. Plant. vol. iii. p. 505.) 
Mucaciinium leucorhachis; rhizomate valido repente, pseudobulbis 2-3-polli- 
caribus ovoideo-oblongis compresso-4-gonis levibus 2-foliatis, foliis 4-7 
poll. longis 1-1} poll. latis linearibus v. anguste oblanceolatis obtusis 
crasse coriaceis lete viridibus rubro marginatis, pedunculis ascendentibus . 
subfalcatis 4-6 poll. longis vaginis remotis spathaceis appressis 4 
poll. longis brunneis instructis, rhachi florifera 3-5-pollicari falcata 
ensiformi 4-3 poll. lata leviter compressa alba multiflora, inter- 
nodiis ad ; poll. longis, bracteis distichis } poll. longis patenti- 
reflexis late ovatis acutis membranaceis brunneis persistentibus, floribus 
distichis breviter pedicellatis 4 poll. longis decurvis velutinis croceis, 
sepalo dorsali erecto lineari-lanceolato, lateralibus brevioribus oblique 
late ovatis subacutis, petalis sepalo dorsali equilongis linearibus 
erectis falcatis, labello parvo lingueformi recurvo basin versus utrinque 
fimbriato, columna latiuscula apice angustata bidentata. 
M. leucorhachis, Rolfe in Kew Bulletin, 1891, p. 198; et in Dyer Fl. Trop. 
Afr. vol. vii. p. 37. 
The genus Megaclinium is wholly African; it is closely 
allied to Bulbophyllum, differing chiefly in the dilated, 
flattened rhachis of the inflorescence, distichous flowers, 
and in the dorsal sepal being much longer than the lateral. 
Twenty species are described in the “Flora of Tropical 
Africa,” of which three have been previously figured in this 
work, namely, M. maximum, Lindl. Gen. § Sp. Orch. p. 47 ; 
(M. purpuratum, Lindl. in Journ. Linn. Soc. Bot. vol. vi. p. 
128, tab. nostr. 5936) in which the lateral sepals are nearly 
as long as the dorsal, M. Lindleyi, Rolfe (M. maximum, 
Lindl. in Bot. Reg. tab. 1959, tab. nostr. 4028, and M. 
minutum, Rolfe (tab. nostr. 7314). All are natives of 
West Tropical Africa. 
M. leucorhachis was sent to the Royal Gardens, Kew, in 
1896, from Lagos, in the Gulf of Guinea, by Mr. H. 
Millen, Curator of the botanical station in that colony. 
It flowered in a tropical house in April of this year. 
Descr.—Rootstock stout, creeping. Pseudobulbs two 
inches to three inches long, obovoid-oblong, compressed, 
DreemBer Ist, 1901, 
