Dispei'is.] cxxxiii. orchide^ (rolfe). 201 



sepals obliquely oblong, acute, 2 lin. long. Lip cuneate, divergently 

 2-armed ; arms papillose ; appendage elongate-oblong, fleshy, papillose. 

 Column very stout ; arms of rostellum linear-falcate, 1 lin. long. 



^ower Guinea. Angola : Pungo Andongo, Welwitsch, 694 ! 



Tlie flower examined was in a young state, and so membranous that I could not 

 make out the exact details, hence the characters are chiefly repeated from Reichen- 

 bach. 



6. D. Johnstoni, Reichb. f. ex Oliv. in Trans. Linn. Soc. ser. 2, 

 ii. 349 (name only). Stem slender, 4-6 in. high, 2-leaved. Leaves 

 alternate, sessile, cordate-ovate or ovate-oblong, subobtuse or apiculate, 

 8-13 lip. long, 4-8 lin. broad, with an apiculate sheath at the base. 

 Kacemes short or subcorymbose, 2-5-flowered. Bracts ovate, acute or 

 apiculate, 2J-4 lin. long. Pedicels 4-6 lin. long. Dorsal sepal united 

 with the petals into a concave obtuse hood, 3 lin. long, slightly gibbous 

 behind ; lateral sepals obliquely semiobovate, apiculate, united in the 

 basal third. Lip with slender flattened claw, 1| lin. long ; basal third 

 adnate ; free part bearing a pair of suberect, linear, obtuse appendages, 

 over J lin. long, below the middle of the free part ; limb reflexed, ovate, 

 membranous, | lin. long, exserted from the galea, with a broad, flattened, 

 obtuse erect tooth or crest near the base. Column 1 lin. long ; arms of 

 rostellum J lin. long. Capsule oblong, 5-6 lin. long. 



nxozamb. Dist. German East Africa : Kilimanjaro, 5000-6000 ft., Johnston ! 



7. D. Kerstenii, Reichb. f. Otia Bot. Hantb. ii. 102. Stems slender, 

 G-9 in. long, 2-leaved, with an acute sheath near the base. Leaves 

 opposite, very shortly petioled, cordate-ovate, subacute or apiculate, 

 1|--1J in. long, 10-12 lin. broad. Raceme short, 2-4-flowered. Bracts 

 ovate or ovate-lanceolate, acuminate, 4-6 lin. long. Pedicels 5-6 lin. 

 long. Flower violet. Dorsal sepal galeate, 4 lin. long, with inflexed 

 apex ; lateral spreading, free, obliquely obovate, inner margin pro- 

 duced into a spur 1 lin. long. Petals with a narrow claw united to 

 the margin of the dorsal sepal ; apex extended into free quadrate-dola- 

 briform wings, 2 lin. broad, and nearly as long. Lip with a narrowly 

 linear curved claw, 5 J lin. long ; basal sixth adnate ; limb sharply re- 

 flexed, triangular-oblong, pilose, h lin. long, with incurved subobtuse 

 apex ; appendage deeply bilobed, 2 J lin. long, exserted over the lateral 

 sepals ; the arms slightly dilated above, with a curved subacuminate 

 apex, and a reflexed, linear tooth, 1 J lin. long, from the broad inner 

 angle. Column very broad, 1 lin. long ; rostellum bilobed ; arms 

 slender, 1 lin. long. 



XMEozamb. 3>lst. German East Africa : Kilimanjaro ; Chagga District, 3000- 

 4000 ft., Kersten, and at 7500 ft., Johnston ! 



8. D. Preussii, Rolfe. Stem rather slender, 5 in. high, 2-leaved. 

 Leaves opposite, shortly petioled, cordate-ovate, subacute or apicu- 

 late, 1 in. long, 10 lin. broad; petioles Ij lin. long. Racemes 

 3- to 1-flowered. Bracts ovate, acuminate, 2-6 lin. long. Pedicels 

 3 lin. long. Dorsal sepal almost reduced to an oblong, obtuse spur. 



