148 Transactions of the South African Philosophical Society. 



lateralia oblanceolata, dorsale oblongum, 0*22 cm. longa ; petala 

 patenti-reflexa, oblonga, acuta, 0*31 cm. longa, quam sepala duplo 

 latiora, cum labello minute papilloso-scabriuscula ; labellum sub- 

 quadratum, 3-lobum, lobulis lateralibus patentibus dentiformibus, 

 vel in var. /3 omnino carentibus, lobo intermedio multo majore, 

 subtrulliformi, breviter acuto, supra basin angustato, marginibus 

 eleganter curvo-ampliatis, tota lamina 0*35 cm. longa et lata, basi 

 in calcar subrectum acutum, 015-0-2 cm. longum, producta; 

 columna ovalis ; pollinium caudiculse brevissimse, glandulis discretis 

 vel (ex collectore), filo extensivo connexis. 



Var. (3, integra ; sepalis lateralibus calcaratis ; labelli lobulis 

 lateralibus carentibus ; ceteris ut in typo. 



Hab. : Transvaal Colony ; Fig-tree Creek, near Barberton, on 

 rocky slopes, alt. about 2,000 ft., Sept. (1890), W. Culver, 84 ! 

 Var. j3 growing with and close to the typical form, Culver, 84a ! 

 (in herb. Schlechter ; Bolus). 



Petals and lip white. Most nearly allied, amongst the South 

 African species known to me, to H. MacOwa?iiana, Eeichb. f. ; 

 but the aspect is different, the spike being much closer and more 

 numerously flowered. I believe this is the only known instance 

 of spurred sepals in the genus. 



Disa Marlothii, Bolus, n. sp. (Orchidacese-Diseas). 



D. (§ Eu-Disa), foliis synanthiis radicalibus expansis herbaceis ; 

 racemis paucifloris, laxis ; floribus mediocribus ; calcare sepali ion- 

 paris patente subelongato ; petalis obtusis ; rostello apice integro. 



Herba erecta, glabra, 14-25 cm. alta; folia synanthia, radicalia, 

 plura, oblanceolata, acuta, herbacea, basi longe membranaceo-vagi- 

 nantia, 3-5 cm. longa, parte latiore O'8-l'l cm. lata ; caulis gracilis, 

 substrictus, vaginis 4-7, erectis, herbaceis, marginibus submembra- 

 naceis, arete amplectentibus vestitus ; racemus saepius laxissime 

 2-5-florus, vel in exemplaribus macilentis 1-florus, pedicellis gra- 

 cilibus elongatis ; bractese vaginis conformes saepe marginibus 

 coloratis, ovario multo breviores ; flores patentes, in sectione medi- 

 ocres, saturate rosei, galea petalisque maculis purpureis notatis ; 

 sepala lateralia patentia late oblonga, obtusissima, sub apice mucro- 

 nulata, 0*9-1 cm. longa; sepalum impar posticum, galeatum, oris 

 ambitu obovato obtuse acutiusculo, sepalis lateralibus sequilongum 

 dorso in calcar patens vel subadscendens nullo modo deflexum sub- 

 strictum vel levitur recurvum, apice valde attenuatum, l'4-l - 9 cm. 

 longum, productum ; petala erecta sub galea semiabscondita, late 

 oblonga, obtusissima, basi postice angulo recto abrupte geniculato- 



