484 MR. H. BOLUS’S CONTRIBUTIONS 
loba, 1:2-1:7 em. longum, 1:0-1:3 em. latum ; rostellum breve sub- 
erectum 0:2 em. longum; ovarium deflexum 1:7-2:5 em. longum. 
Hab. ln arenosis prope Cape Town, flor. Nov., H. Bolus 
No. 3810!; prope rivulum * Kuil's Rivier," Pappe 89! 377!; 
Ecklon 1566! 
The galea is a metallic greenish blue, the side sepals and petals 
dull purple, the lip green. This species is by far the strongest and 
tallest of this section, and is readily distinguished by its nume- 
rously flowered spike and green lip. The leaves are generally 
broader than in the allied species. 
$ MONADENIA. 
Disa TENUIS, Lindl.! Gen. et Sp. Orch. p. 854 (descr. emen- 
data). D. foliis anguste linearibus ; spica gracili densa multiflora ; 
galea setaceo-acuminata, calcare brevi conico ascendente ; sepalis 
oblongis dorso sub apice longe mueronatis; petalis oblongis ; 
labello lineare; caudiculis polliniorum glandula unica affixis. 
Tuber magnum oblongum ; caulis gracilis erectus subflexuosus 
pedalis vel ultra, vaginis setaceo-acuminatis distanter vestitus ; 
"folia 2-4, basi vaginula inclusa, subfiliformia, apicem versus 
latiora, linearia 1 lineam (0'2 em.) lata” (ex Sonder); spica 6-10 
em. longa, 0°8 em. lata, bracteis setaceo-acuminatis floribus 
eequantibus vel paulo brevioribus; sepala lateralia 0'25 cm. longa, 
mucrone 0°08 em. longo aucta; galea suberecta 0'4 cm. longa, 
calcare vix O'L em. longo; petala lateralia incurva margine an- 
tica serrulata 0°15 em. longa; labellum subobtusum serrulatum 
petalis equilongum ; columna brevis; anthera resupinata, glan- 
dula polliniorum subquadrata; rostellum erectum ; stigma de- 
pressum marginatum; ovarium clavatum 0:5 em. longum. (v. v.) 
—D. leptostachys, Sond.! in Linnea, xix. p. 98. 
Hab. In clivis montis Diaboli prope ^ King’s Blockhouse,” 
Cape Town, alt. 1200 ped. flor. Maio, Bodkin, Bolus 4874!; in 
arenosis prope Wynberg, Drége!; in montibus ad flumen Palmiet 
Rivier, Junio, Ecklon & Zeyher! 
The flowers are a dull green with purple spots on the galea, 
turning black in drying. The very acuminate galea and the 
single gland of the pollinia distinguish the species from any 
other. The latter character escaped Lindley. Sonder, in his 
excellent description of D. leptostachys, which I have no doubt is 
the same thing, says “ Pollinia basi connata.” By this character, 
and that of the stigma, which greatly resembles that of Mona- 
