Ansellia.] cxxxiii. orchide^ (rolfe). 101 



Disc of lip with three crenulate or verrucose keels ; sepals 



and petals l-lj in. long . . . . . . 2. A. niloiica. 



Disc of lip with two keels, or the median one partially 

 devoloped. 

 Lip 7-8 lin. long; sepals and petals 10-12 lin. long. 

 Leaves 1-1:^ ft. long ; keels of lip verrucose or crenu- 

 late . . . . ... . .3.-4. confusa. 



Leaves fi-8 in. long; keels of lip smooth . . .4. A. humilis. 



Lip 54in, long; sepals and petals 9 lin. long . . . h. A. congoensvs. 



1. A, africana, Lindl. in Bot. Reg. 1844, sub t. 12. Pseudobulb 

 elongate, somewhat thickened in the middle, lJ-2 ft. or more long. 

 Leaves elliptic-oblong or lanceolate, subacute, 6-12 in. long, 1^-1 J in. 

 broad. Panicle branched, 9-1 2 in. long, many-flowered. Bracts broadly 

 ovate or ovate-oblong, subobtuse, 1^-3 lin. long. Pedicels 1-1 4 in. long. 

 Sepals elliptic-oblong, obtuse, 11-14 lin. long. Petals a little broader 

 than the sepals. Lip trilobed, 8-0 lin. long; side lobes semiovate, 

 obtuse ; front lobe broadly obovate- oblong, obtuse ; disc puberulous, 

 with 3 linear keels, the middle one smaller than the side. Column 

 clavate, G lin. long. — Bot. Mag. t. 49G5 (excl. fig. 3) ; Reichb. f. in Bon- 

 plandia, v. 134; Gartenfl. iii. 243, t. 95 ; E-eichb. f. in. Walp. Ann. vi. 

 G27 ; Reichb. f. Xen. Orch. ii. 18 ; Will. Orch. Alb. viii. t. 3G7. 



Upper Guinea. Fernando Po : near Clarence (Sta. Isabel), in jungle, on Elais 

 (jiiineensis; Vorjel, 25 ! Ansell ! 



An Angolan species which has been referred here (Reichb. f. in Flora, 1865, 188) 

 is known only from fruiting specimens, and therefore remains doubtful. It was col- 

 lected at Bumbo, TFelwitsch, 711 ! and Huilla, Antunes, 21 ! 



2. A. nilotica, N. E. Br. in Lindenia, ii. 36. Pseudobulb 1-2 ft. 

 long, elongate, a little thickened above the middle. Leaves lanceolate 

 or oblong-lanceolate, subacute, G-15 in. long, 1-1 J in. broad. Panicle 

 9-18 in. long, branched or rarely simple, racemose. Bracts triangular- 

 ovate, subobtuse, lJ-2 lin. long. Pedicels 1J-1| in. long. Flowers 

 deep yellow, spotted with brown. Sepals oblong, obtuse, l-lj in. long. 

 Petals similar to the sepals, subequal. Lip trilobed, 9-10 Jin. long ; 

 side lobes semiovate, obtuse ; front lobe obovate-oblong, obtuse ; disc 

 with 3 verrucose or crenulate keels, the middle one smaller than the 

 side. Column clavate, 8 lin. long. — A. africana var. nilotica, Baker 

 in Trans. Linn. Soc. xxix. 154 ; Reichb. f. Otia Bot. Hamb. ii. 74. 



Wile I.and. British East Africa : Mombasa, Rildehrandt, 1952 ! Ribe, Wake- 

 field ! Jomvu, Wakefield! 



Mozamb. Bist. German East Africa : Usambara ; Tanga, on Hyphane, Kirk ! 

 Usagara ; Mbwiga, 1200 It., on tall trees. Chant ! 



Var. rossiana, Rolfe in Orch. Rev. i. 199. Flowers primrose yellow, with smaller 

 and less numerous, much paler spots. 



irile Iiand. Zanzibar, cultivated specimens ! 



" The Wahiao use its jointed roots medicinally, and call the plant 3/tYooro." — 

 Grant. 



