TO SOUTH-AFRICAN BOTANY. 481 
latis; galea antica cucullata vix saccata; sepalis obovatis con- 
cavis; petalis oblongis apice oblique lobatis; labello oblongo 
truncato. 
Herba glabra, 4-6-uncialis. Tubera ovoidea, 1°5 em. longa. 
Folia infima 3 em. longa, 1 em. lata, superiora sensim minora, 
suprema in vaginas amplexicaules abeuntia, acuta, lete viridia. 
Bracteæ lanceolate acutæ. Spica corymboideo-congesta, 3-8- 
flora, 2-3 cm. longa. Galea ore contracta apice basique obtusa, 
07 em. longa, 0°5 em. lata, candida. Sepala lateralia subequalia 
obtusa concoloria, apice breviter roseo-suffusa. Petala reclinata, 
apice incurva lutea 0:55 em. longa.  Labellum incurvum aureum, 
0'4 em. longum.  Rostellum reclinatum bifidum candidum. An- 
thera horizontalis. Ovarium 1-2 em. longum. Stigma quadra- 
tum trilobum candidum (v. v.).—Penthea obtusa, Lindl. Gen. et 
Sp. Orch. 361. 
Hab. In turfosis humidis, in clivo orientali montis Tubularis, 
alt. 3400 ped., a mense Septembri in Octobrem florens. Legit 
H. Bolus anno 1882, herb. No. 4846 !, Harvey 121! 
A very distinct species, recalling in habit dwarfed plants of 
D. Melaleuca, and also allied to D. minor, Reichenb. f. Al these, 
with D. atricapilla, Bolus, D. rosea, Lindl., D. fasciata, Lindl., 
and perhaps some others, will constitute a very natural section of 
this difficult genus, distinguished by the following characters :— 
Spike generally crowded or opening slowly ; flowers horizontal, 
usually appearing as a flat-topped corymb ; galea anticous, for- 
nicate or cucullate, neither spurred nor saccate. Lindley’s name 
of Penthea for some of these is not suitable for the section, because 
several of his Penthee, as P. reflexa, P. filicornis, P. patens, by 
their large expanded posticous galea and different habit, belong 
to a distinct section. In the group I am now speaking of the 
galea is anticous because the ovary is straight, not twisted as is 
general in Disa; and, subject to a further examination of other 
species, I should suggest the term Orthocarpa for the section. 
§ HERSCHELIA. 
The following is a synoptical key to the published species of 
this section :— 
Labellum crenate, waved, or entire. 
Labellum oblong, reflexed; gland of pollinia longer than broad. 
1. D. graminifolia. 
LINN. JOURN.— BOTANY, VOL. XX. 2g 
