Holothriz:. | CXXXIII. ORCHIDEE (ROLFE). 191 
Lip tridentate or trilobed. 
Spur more or less conical. 
Petals thickened and fleshy . 3. H. Richardii. 
Petals caudate-acuminate 4. H. vatkeana. 
Spur filiform 5. H. Usambare. 
Lip five-lobed 6. H. arachnoidea. 
Lip seven-lobed. 
Petals twice as long as the sepals 7. H. Nyassa, 
Sepals and petals subequal, 
Sepals tridentate 8. H. tridentata. 
Sepals acute : ; ; . 9. H. platydactyla. 
Lip with about 12 linear segments . 10. H. pleistodactyla. 
Petals and lip $ inch long : : : d . 11. H. Johnstoni. 
Petals and lip divided above into long filiform segments. 
Petals and lip 1}—14 in. long. 
Spur very strongly recurved . : - . 12. H. longiflora. 
Spur slightly recurved. : : : . 13. H. Meduse. 
Petals and lip scarcely 3 in. long . : - . 14. H. Lastii. 
1. D. puberula, Rendle in Journ. Bot. 1895, 278. Plant about 
tin. 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} in. long, about 10-flowered. Bracts ovate, 
acuminate or aristate, carinate, 2 lin. long. Pedicels 14-2 lin. long. 
Sepals ovate-triangular, acuminate, 14 lin. long. Petals triangular- 
lanceolate, acuminate, 2 lin. long. Lip subspathulate, subacute or 
apiculate, entire, 34 lin. long, 14 lin. broad ; spur slender, recurved, 
1} lin. long. Column stout, 4—3 lin. long. 
Mozamb. Dist. German East Africa: Kilimanjaro, 6000 ft., Johnston ! Ukam- 
bane, Masai Highlands, 5000-6000 ft., Scott-Elliot, 6486 ! 
2. H. brongniartiana, Reichb. f. 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, whiċh 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. 
Wile Land. Abyssinia: Semen; Agrina, on mountains, 6000-7000 ft., Schimper, 
651, also at Debra Erki, near Woina, 7000 ft., rare, Schimper, 651, Begemeder; on 
mountains, 7500 ft., Schimper, 1329! 
3. H. Richardii, Rolfe. Plant 5-6 in. high. Leaves 2, radical, 
subopposite, ovate, subacute, delicately membranous, reticulate-veined, 
long pilose, 3-1} in. long, }-1}in. broad. Scapes 5—6 in. high, retrorsely 
pilose. Spikes short, subspiral, few-flowered. Bracts ovate or ovate- 
lanceolate, acute or acuminate, 1}-1} lin. long. Pedicels 1 lin. long, 
pilose. Sepals ovate, subacute or obtuse, $ lin. long. Petals ovate- 
lanceolate, thickened and fleshy above, subobtuse, 1-1} lin. long. Lip 
cuneate-oblong ; base concave; apex tricuspidate with narrow, equal 
