TAB. 1. 



Tribe Yaxde.k. 

 Snb-tribc Sarcanthe.'I^, 

 Genus Listrostachys. 



Listrostachys arcuata, Rcichb. f. in IValp. Ann., vol. vi., 

 p. 907 (1864).— Herba epiphytica robusta glabra, radicibus ad 

 0*6 cm. diam. ; caulis adscendens foliosus ad SO cm. long-us, 1 cm. 

 diam. ; folia disticha lineari-oblong-a apice obliqua obtusis.sima 

 biloba, ad 14 cm. long-a, 1-5-2-5 cm. lata; racemi 5-9 flori, 

 5-10 cm. longi, bracteis subrotundo-ovatis concavis membranaceis 

 brunneis conspicuis, 1-1-2 cm. longis ; sepala lanceolata longe 

 acuminata patenti-recurvata, 2-2-5 cm. longa ; petala sepalis 

 simillima sed breviora, 1-5-2 cm. longa; labelli limbus petalis 

 conformis, 1-8-2-8 cm. longus, calcare arcuato-infundibulitbrmi 

 apice uncinato-revoluto, limbo pauUo longiore ; columna nana, 

 0-2 cm. longa ; operculum cucullatum rostratum ; rostellum sub- 

 panduriforme apice attenuatum incurvatum ; pollinia 2, sub- 

 spheerica ; stipites 2, oblique lineari-oblanceolati cartilaginei, 

 glandule communi cartilaginese adnati ; capsula cylindrica 

 angulata, angulis alatis, 8-5 cm. longa, 1*8 cm. diam., pedicellis 

 2-2-5 cm. longis. — {Ex exempli, plur. viv. exsiccatisque.) — 

 Angraecum arcuatum, Lindley, in Hook. Comp. Bof. Mag., vol. ii., 

 p. 204 (1886). 



Hab : South-eastern Region ; Cape Colony : Uitenhage : 



hills at Coega River, fl. Dec, Zeyher, 8890! ; near Port Elizabeth, 



Mrs. Holland; Trans-Vaal : Golden Valley,! Sheba Hill, near 



/ Barberton, alt. 1050 meters, fl. March, E. E. Galpin, 850 ! ; W. 



Culver, 73 ! ; Natal : Mrs. K. Saunders ! 



Plate 1. Fig. 1, flower, side view ; 2, ditto, the sepals and 

 petals removed; 8, column, side view ; 4, ditto, front view shewing 

 the pollinarium in situ ; 5, pollinarium, spread out ; 6, ditto, 

 shewing the pollinia and stipites revolute after withdrawal of 

 the gland. 



An epiphytic robust glabrous herb, with the roots attaining 

 0'6 cm. in diam. ; stem ascending leafy up to 80 cm. long, 1 cm. 

 diam. ; leaves distichous linear-oblong oblique at the apex very 

 obtuse bilobed, up to 14 cm. long, 1-5-2 -5 cm. broad ; racemes 



