Tap. 6529. 
DISA mucaceras. 
Native of South Africa. 
Nat. Ord. Oncu1pEx.--Tribe OpHRyYDE®. 
Genus Disa, Berg; (Endl. Gen. Pl. p. 211.) 
Disa (Repandra) megaceras ; elata, robusta, caule folioso, foliis lanceolatis acumi- 
natis, spica multiflora, bracteis lanceolatis longe acuminatis floris brevioribus 
v. longioribus, floribus magnis albis purpureo maculatis, galea postica conica in 
cornu pollicari recto v. lente curvo tenui producta, sepalis decurvis oblongo- 
lanceolatis apiculatis, petalis late oblique ovatis recurvis acutis, labello anguste 
lingulato glabro apice acuto recurvo v. revoluto, anthera supina loculis 
elongatis fere rectis. 
-D. macrantha, Hort. 
It is not without great consideration that I have been com- 
pelled to give a new name to the little-known Disa macrantha 
of the gardens, nor would I have done so were I not well 
assured that the true D. macrantha is a very different plant, 
coming indeed from a very different part of the South 
African continent from that inhabited by the present 
species. It is true that of D. macrantha very little is cer- 
tainly known; it is a species of Thunberg’s, described in 
his “Flora Capensis ” (p. 33) as having the spur conical, 
shorter than the hood, the petals small, hidden under the 
hood, rounded at the base, faleately recurved in the middle, 
angled posteriorly, dilated retuse and crenulate at the end, 
the lip oblong acute keeled suberect, and the anther &e. 
as in J. cornuta, than which the flowers are rather larger.— 
Now if the figure of the plant here given is compared with 
this description, and with the plate of D. cornuta in 
this work (t. 4091), it will be seen that in all those points 
in which D. macrantha differs from D. megaceras, it agrees 
with D. cornuta, notably in the short spur, in the small 
petals falcately recurved, dilated at the apex, and hidden 
under the hood; in the oblong lip and very small broad 
anther: to which must be added that D. macrantha is a 
western plant of the Cape district itself, whereas 1). meyaceras 
is an eastern one, of which there are in the Kew Herbaria 
DECEMBER Ist, 1880. 
