TO SOUTH-AFRICAN BOTANY. 483 
Glabra erecta; tubera difformia ; scapus simplex 13-23 pedalis ; 
folia 6-9 radiealia linearia graminoidea, medio marginibusque 
nervata, scapo breviora, basi fibris foliorum vetustiorum cincta ; 
spica laxiflora leviter flexuosa, 7-10 cm. longa; sepala lateralia 
oblonga acuta infra apicem subtus mucronulata, L'5 em. longa, 
0:6 em. lata; sepalum posticum galeatum ovatum acutum, 1:3 cm. 
longum, 1 em. latum, calcare ascendente compresso 0'5 em. longo, 
preditum ; petala lateralia linearia medio geniculata, apice dila- 
tata dentata, basi oblonga obtusa integra, column: adnata, 0*8 em. 
longa; labellum ovato-oblongum deflexum, laciniis obtusis in- 
eurvis barbatum, 0'9 em. longum ; anthera horizontalis; glandula 
polliniorum oblonga, longior quam lata; rostellum oblongum 
erectum; stigma sepius obscure bilobum ; ovarium gracile cur- 
vatum 1 em. longum. (v. v.) 
Hab. Inter Restiaceas fructiculosque in dunis Cape Flats 
dietis, prope urbem Cape Town, frequens; flor. Oct.-Nov. 
Herb. propr. No. 4566 ! Harvey 140! 
The sepals are a cheerful blue to blue-purple, with darker 
veins; the petals white tinged with purple below; the labellum 
creamy white; the spur greenish yellow, producing, when looking 
into the flower, the appearance of a yellow eye; the anther-cells 
pink; stigma and rostellum white. In the dried state it re- 
sembles D. barbata, Sw., with which it has been confused in her- 
baria. But it is distinct by its more numerously flowered spike, 
blue flowers, and differently shaped galea and rostellum ; and in 
the live state there is not a moment’s hesitation in distinguishing 
them. It grows in the same localities as D. barbata, Sw., and 
D. lugens, Bolus, but flowers later than these, and about the same 
time as D. purpurascens, Bolus. 
Disa (§ HERSCHELIA) LUGENS, Bolus, n. sp. Spica laxe 10-15 
flora; floribus triste-purpureis ; labello lacerato viride. 
Glabra erecta 14-2 pedalis; tubera obovata 3-5 cm. longa; 
folia omnia radicalia 6-12 linearia graminoidea laxa, supra leevia, 
infra nervata marginataque, 20-40 cm. longa; vagins amplexi- 
caules membranacez acute; spica 15-20 cm. longa; bracteæ 
ovate  membranacesm ovario breviores; sepala lateralia oblonga 
acuta 1 cm. longa; galea ore ovato acuta Ll em. lata, calcare 
conico ascendente 0'3 cm. longo predita; petala lateralia falcata 
acuminate biloba, basi dilatata et dentata; labellum oblongum 
margine lacerato-multifidum laciniis sepe apicem versus 2-4 
