174 CXXXIII. ORCHIDEX (ROLFE). | Mystacidium. 
broader than the sepals. Lip cuneate; apex dilated, slightly trilobed, 
or entire and subacute ; spur filiform, falcate, longer than the pedicels. 
—Aéranthus rutilus, Reichb. f. in Flora, 1885, 3582. Listrostachys rutila, 
Ridl. in Bolet. Soc. Brot. v. 200. 
Lower Guinea. Island of St. Thomas: Nova Moka; Santa Maria, 2600- 
4400 ft., Moller. Angola, Monteiro. 
Only known to me from the original description. 
14. M. productum, Kränzl. in Engl. Jahrb. xxii, 30. Stems 
elongate, many-leaved, internodes about ł in. long. Leaves distichous, 
oblong ; apex obscurely bilobed, acute. Racemes mostly solitary, nearly 
opposite the leaves, very straight, more than twice as long as the leaves, 
many-flowered, with numerous sheaths below the flowers. Bracts 
small, ochreate, retuse. Flowers 14 lin. long, pale brown. Sepals 
oblong, obtuse. Petals equal, linear, acute. Lip dilated from the base, 
flabellate-subquadrate, obscurely bilobed, retuse; disc with a minute, 
acute tooth at the base; spur incurved, fusiform, obtuse, a little longer 
than the limb and pedicel. Column stout; anther produced in front. 
Upper Guinea. Cameroons: between Victoria and Bimbia, on high trees, 
Preuss, 1227. 
Only known to me from the original description, but apparently allied to the pre- 
ceding. 
15. M.-curvatum, Rolfe. Leaf obovate-oblong, obliquely and 
obscurely bilobed, 2? in. long, 12-13 lin. broad ; lobes subacute. Raceme 
arching, 4-44% in. long, lax, many-flowered. Bracts very broadly ovate, 
subobtuse, 4-} lin. long. Pedicels 2-2} lin. long. Flowers light 
yellowish-green. Sepals oblong or elliptic-oblong, obtuse, 2-2} lin. 
long. Petals ovate-oblong, obtuse, slightly shorter than the sepals. 
Lip ovate-suborbicular, obtuse, 14 lin. long; disc thickened round the 
mouth of the spur ; spur slender, curved, 5—6 lin. long. Column stout, 
2 lin. long. Pollinia with slender stipites and separate, ovate-oblong 
glands. 
Upper Guinea. Ashanti: cultivated specimen! 
Flowered in the collection of Sir Trevor Lawrence, Bart., in 1892. 
16. M. Tridens, Rolfe. Plant very dwarf, almost stemless. Leaves 
linear-lanceolate, 1-2 in. long; apex unequally and minutely bilobed ; 
lobes obtuse. Scapes suberect, very slender, 2-3 in. long. Racemes 
5-8-flowered. Bracts triangular, subobtuse, scarcely } lin. long. Pedi- 
cels 24-3 lin. long. Dorsal sepal ovate, subacute, recurved, 3 lin. long; 
lateral subspathulate-linear, subobtuse, 1} lin. long. Petals ovate, 
acuminate, recurved, ł lin. long. Lip tripartite from a short, broad 
base, with subulate, diverging lobes, 1} lin. long; spur 1 lin. long, 
inflated at the apex. Column very short; pollinia with distinct, 
clavate stipites and oblong, downy glands, both somewhat hairy.— 
Listrostachys Tridens, Reichb. f. in Flora, 1865, 190. Angrecum Tridens, 
Lindl. in Journ, Linn. Soe. vi. 135. 
Upper Guinea. Fernando Po, 4000, ft., Mann, 646! 
