The African H. bicolor is founded primarily on an 
Angolan plant of Welwitsch, under which its authors in- 
cluded a Natal one, the subject of the present plate, and 
which I have named HL. Zeyheri, after its discoverer, the 
German collector Zeyher ; and the Angolan one may appro- 
priately bear the name EF. Welwitschii, after its discoverer. 
Though very much alike in many characters, of the flower 
especially, H. Welwitschii may be at once distinguished by 
its closely sheathed scapes, long racemes of flowers, and 
many-nerved leaves two and a half inches broad. In 
Lf. Zeyheri, on the other hand, the leaves hardly an inch 
broad are 3-nerved, and the flowers are arranged in sub- 
corymbose head, as in H. ensata, Lindl. (Bot. Reg. t. 1147), 
and other species from the same region of Africa. In fact, 
fj. Zeyheri is much more nearly allied to H. ensata than to 
H. Welwitschii, differing chiefly in the much larger flowers 
and orbicular (not oblong) midlobe of the lip. 
I am indebted to my friend, H. J. Elwes, Esq., F.S.L., 
of Colesbourne, Andoversford, Gloucestershire, for the 
specimen here figured, which flowered with him in April 
of this year, and perfected its leaves in the following 
June. It is a native of Natal and British Caffraria. 
_ Deser.—A stout glabrous tuberous-rooted Orchid, 12-18 
inches high, flowering before leafing. Leaves as long as 
the scape, narrowly lanceolate, acuminate, plaited, with 
three principal nerves. Scape as thick as a goose-quill, 
sparingly sheathed. Flowers crowded at the top of the 
Scape, pale golden-yellow, with dark purple side lobes and 
base of the lip. Sepals one and a half inch by two-thirds of 
an inch and rather smaller petals oblong acuminate. Lip 
adnate to the base of the column, and produced behind into 
a short obtuse spur; side lobes small, rounded, erect ; mid- 
lobe large orbicular concave with numerous soft bristles 
on the disk ; two tomentose ridges are situated between the 
side lobes, each ending ina hook. Ovlwmn broad, hollow 
in front. Anther rather small.—J. D. H. j 
Fig. 1, Lip and column; 2, lip; 8, column and spur of lip; 4, anther; 
5, pollinia :—AJZ enlarged. eisai J . 
