Satyrium.] CXXXIII. ORCHIDEZ (ROLFE). 267 
the lateral sepals; mouth oblong; narrow margin and obtuse apex 
reflexed; spurs linear-filiform, 4—44 lin, long; basal angle of galea 
with a pair of additional triangular sacs, 4—3 lin. long. Column 14 lin. 
long ; stigma broadly rounded, sides somewhat reflexed ; rostellum very 
SS roundish, with reflexed apex, and a pair of minute teeth at 
the base. 
Mozamb. Dist. British Central Africa: Shire Highlands, Buchanan ! 
8. S. longissimum, Rolfe. Plant tall, apex only seen. Raceme 
rather lax, 5-6 in. long. Bracts ovate, subacute, 7-14 lin. long. 
Pedicels 4 lin. long. Flowers white. Sepals 6 lin. long, the odd one 
narrowly oblong, obtuse; lateral broader, spreading. Petals united for 
a quarter of their length to the sepals, and similar to the odd one. 
Lip galeate, 5 lin. long, the basal fourth united to the lateral sepals ; 
mouth broad; apex broad, reflexed, very obtuse, somewhat plicate 
and apiculate; spurs elongate-linear, 15-20 lin. long. Column 4 lin. 
long; stigma obcordate; rostellum trilobed, side lobes broadly trian- 
Ee front lobe orbicular, reflexed, much larger than the side 
obes. 
Mozamb. Dist. South-east Tropical Africa, without locality ! 
; Described from a specimen presented to Kew by Mr. J. O’Brien, who received it 
without a precise indication of locality. 
9. S. riparium, Reichd. f. in Flora, 1865, 183. Tubers ovoid- 
oblong, 4-3? in. long. Plant 14 ft. high, with six or seven tubular 
sheaths, upper lanceolate, acute at the apex. Leaves on barren shoot 
(one only seen), ovate, obtuse, 14 in. long, 9 lin. broad. Raceme 
elongated, 6 in. long, lax. Bracts ovate, acute, 3-8 lin. long. Pedicels 
23-3 lin. long. Flowers waxy yellow. Sepals 24-3 lin. long; odd one 
cuneate-oblong, obtuse; lateral falcate-oblong, subobtuse, rather longer 
and much broader. Petals united for two-thirds of their length 
to the sepals, and slightly narrower than the odd one. Lip galeate, 
¢arinate, 3-34 in. long, basal half or rather more united to the lateral 
Sepals; mouth rather broad; apex constricted behind the broadly 
ovate, subacute, reflexed limb; spurs linear-filiform, curved, 9-10 lin. 
long. Column 24 lin. long; stigma broadly obcordate-oblong, inflexed 
at the sides; rostellum oblong, obtuse, laterally compressed. 
Lower Guinea. Angola: Huilla; by the side of the River Humpata, very 
sparsely distributed, Welwitsch, 730! 
10. S. Volkensii, Schlechter in Engl. Jahrb. xxiv. 425. Tubers 
ovoid-oblong, 7—14 lin. long. Plant stout, 2} ft. high, with numerous 
acute sheaths. Leaves two, on basal barren shoots, ovate-oblong, obtuse 
or apiculate, 44-5 in. long, 2-24 in. broad. Racemes elongate, 12-14 in. 
long, rather lax. Bracts ovate-lanceolate, acute or acuminate, 5-12 lin. 
long. Pedicels 3 lin. long. Sepals 2 lin. long; odd one oblong, obtuse ; 
lateral nearly twice as broad. Petals united for half their length to the 
Sepals, and similar to the odd one. Lip galeate, carinate, 2-2} lin. long, 
half united to the lateral sepals; mouth roundish-oblong; narrow margin 
