^atyritjimi.'] cxxxiii. orchide^ (rolfe). 267 



the lateral sepals; mouth oblong; uarrow margin and obtuse apex 

 reflexed; spurs linear-liliform, 4-4 J lin. long; basal angle of galea 

 with a pair of additional triangular sacs, J-| lin. long. Column H lin. 

 long ; stigma broadly rounded, sides somewhat reflexed ; rostellum very 

 short, 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- 

 gular-falcate, front lobe orbicular, reflexed, much larger than the side 

 lobes. 



X^ozamb. Bist. 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, Reichb. f. in Flora, 1865, 183. Tubers ovoid- 

 oblong, J-| in. long. Plant Ij ft. high, with six or seven tubular 

 sheaths, upper lanceolate, acute "at the apex. Leaves on barren shoot 

 (one only seen), ovate, obtuse, Ij in. long, 9 lin. broad. Raceme 

 elongated, 6 in. long, lax. Bracts ovate, acute, 3-8 lin. long. Pedicels 

 2J-3 lin. long. Flowers waxy yellow. Sepals 2 J-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, 

 carinate, 3-3J 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 2-J lin. long ; stigma broadly obcordate-oblong, inflexed 

 at the sides; rostellum oblong, obtuse, laterally compressed. 



Z.ower Guinea. Angola: Huilla; by the side of the River Humpata, very 

 sparsely distributed, Wehcitsch, 730 ! 



10. S. Volkensii, Schlechter in Engl. Jahrh. xxiv. 425. Tubers 

 ovoid-ob' jng, 7-14 lin. long. Plant stout, 2\ ft. high, with numerous 

 acute sheaths. Leaves two, on basal barren shoots, ovate-oblong, obtuse 

 or apiculate, 4J-5 in. long, 2-2J 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 J Hn. long, 

 half united to the lateral sepals ; mouth roundish-oblong ; narrow margin 



