Holothrix.'] cxxxiii. orchide^ (rolfe). 191 



Lip tridentate or trilobed. 

 Spur more or less conical. 



Petals thickened and fleshy . . . . S. H. Richardii. 



Petals caudate-acuminate . . . . 4i. H. vatkeana. 



Spur filiform . . . . . 5. H. Usavibarce, 



Lip five-lobed . . , . . 6. -ff. arachnoidea. 



Lip seven-lobed. 



Petals twice as long as the sepals . . . *J. S. Nyassce. 

 Sepals and petals subequal. 



Sepals tridentate . . . . . 8. ^. tridentata. 



Sepals acute . . . . . . 9. -ff. platydactyla. 



Lip with about 12 linear segments . . .10. H. pleistodactyla. 



Petals and lip ■^ inch long 11. JT. Johnstoni. 



Petals and lip divided above into long filiform segments. 

 Petals and lip 1|-1^ in. long. 



Spur ver^' strongly recurved . . . . 12. ^. longijlora. 



Spur slightly recurved . . . . . 13. jff. Medusas. 



Petals and lip scarcely f in. long . . . . 14. if. Lastii, 



1. H. puberula, Rendle in Journ. Bot. 1895, 278. Plant about 

 4 in. high. Leaves 2, radical, ovate-orbicular, subacute, 9-10 lin. long, 

 13-14 lin. broad. Scapes about 4 in. long, puberulous, without sheaths ; 

 racemes subsecund, lax, 1 J in. long, about 10-flowered. Bracts ovate, 

 acuminate or aristate, oarinate, 2 lin. long. Pedicels lJ-2 lin. long. 

 Sepals ovate-triangular, acuminate, Ij lin. long. Petals triangular- 

 lanceolate, acuminate, 2 lin. long. Lip subspathulate, subacute or 

 apiculate, entire, 3J lin. long, IJ lin. broad; spur slender, recurved, 

 1\ Un. long. Column stout, |-J lin. long. 



BKozamb. Dlst. German East Africa : Kilimanjaro, 6000 ft., Johiston ! Ukam- 

 bane, Masai Highlands, 5000-6000 ft., Scott-ElUot, 6486 ! 



2. H. brong:niartianay Reichh. / Otia Bot. Hamb. ii. 107. 

 Leaves 2, broadly ovate, subacute, radical and appressed to the soil, 

 glabrous. Pedicels slender, 2 in. long, retrorsely pilose; spike some- 

 what one-sided. Bracts lanceolate, acuminate, nearly equal to the 

 pedicelled ovary, which is hispid below. Sepals oblong, apiculate, very 

 slightly velvety or almost smooth outside. Petals ovate, falcate, 

 aristate. Lip cuneate-oblong, obtuse ; apex very entire or few-toothed ; 

 spur slender, half as long as the ovary. 



irile Kand. Abyssinia : Semen ; Agrina, on mountains, 6000-7000 ft., Schimper, 

 651, also at Debra Erki, near Woina, 70OO ft., rare, Schimper, 651, Begemeder ; on 

 mountains, 7500 ft., Schimper, 1329 ! 



o. H. Richardii, Rolfe. Plant .5-6 in. high. Leaves 2, i-ndical, 

 subopposite, ovate, subacute, delicately membranous, reticulate-veined, 

 long pilose, |-1 J in. long, J-1 1 in. broad. Scapes 5-6 in. high, retrorsely 

 pilose. Spikes short, subspiral, few-flowered. Bracts ovate or ovate- 

 lanceolate, acute or acuminate, IJ-lJ lin. long. Pedicels 1 lin. long, 

 pilose. Sepals ovate, subacute or obtuse, j lin. long. Petals ovate- 

 lanceolate, thickened and fleshy above, subobtuse, 1-1 i lin. long. Lip 

 cuneate-oblong ; base concave ; apex tricuspidate with narrow, equal 



