Mystacidium. | CXXXIII. ORCHIDEÆ (ROLFE). 171 
acuminate, 1-1} in. long. Lip triangular-lanceolate, acuminate, some- 
what reflexed at the sides above the base, 1-1} in. long; spur filiform, 
elongated, 6-7 in. long. Column stout, 34 lin. long. 
Upper Guinea. Lagos, Millen, 188! 
A very distinct species characterised by its long slender spur. 
4. M. Kenize, Rolfe. Roots very dense, mostly simple. Stem 
2-edged, elongated, about 1 ft.long. Leaves somewhat remote, equitant, 
narrowly lancet-shaped, acute, half as long as the internodes, 14-2 in. 
long, 1 lin. broad. Flowers solitary or in numerous few-flowered racemes, 
distinctly shorter than the leaves. Bracts very minute, triangular. 
Pedicels curved or twisted. Flowers 8 lin. long. Sepals lanceolate, 
acuminate. Petals very similar to, but a little narrower than the 
sepals. Lip very similar to the petals but a little shorter; spur fili- 
form, four times as long as the pedicel, 6 in. long. Column very short. 
Capsule ? in. long, 4 lin. broad—Angracum Keniw, Kränzl. in Engl. 
Jahrb. xvii. 59. 
Nile Land. British East Africa: Ndoro, at the foot of Mt. Kenia, Höhnel, 24. 
Only known to me from the original description, 
5. M. Gravenreuthii, Rolfe. Stems short, rooting; apex only 
leafy. Leaves oblong-lanceolate, 64 in. long, ł in. or more broad ; 
apex unequal, the longer side acute. Racemes slender, pendulous, 
longer than the leaves, few-flowered, with a few bract-like sheaths at 
the base. Bracts ovate, acute, one-fifth as long as the pedicels. Flowers 
white, 2-2} in. diam. ; spur pale pink, 3 in. long. Sepals, petals, and 
lip ovate-lanceolate, very acuminate, radiating; spur filiform, very 
slender, nearly three times longer than the lip; apex very slightly 
bilobed, incurved. Column rather long; anther apiculate; rostellum 
trianguiar, acute, deflexed ; stipites linear; pollinia ovoid, sulcate. 
Capsule nearly fusiform.—Aéranthus Gravenreuthii, Kriinzl. in Engl. 
Jahrb. xvii. 62, 
_ Upper Guinea. Cameroons: in the primeval forest, west of Buea, 6200 ft., 
Preuss, 891. 
Only known to me from the original description. 
6. M, verrucosum, oli Plant slender, with verrucose roots 
and sheaths. Stems branched at the base, 4-7 in. long; branches 
ascending, slightly zigzag. Leaves ligulate, 2-21 in. long, 24-23 lin. 
broad, unequal and slightly bifid at the apex. Racemes axillary, 
2—flowered, longer than the leaves, very slender, perforating the leaf- 
Sheath, bearing two sheaths at the base. Bracts two, broadly ovate, 
chestnut-brown, 2-21 in. long. Pedicels slender, 6-7 lin. long. 
Flowers delicate in texture. Sepals long, caudate from a lanceolate 
base, 134 lin. long. Petals ovate, subhastate at the base, produced into 
filiform tails, 11 lin. long, 14 lin. broad. Lip orbicular-ovate, 6 lin. 
long, 4 lin. broad ; apex rather thick, abruptly acute or acuminate ; 
Spur straight, continuous with the lip, 2 in. long. Column short, 
