156 CXXXIII. ORCHIDE (ROLFE). [Zistrostachys. 
acute, 4 lin. long; lateral suboblique. Petals a little narrower than 
the sepals. Lip ovate-lanceolate, subacute; spur elongate, looped in 
the middle owing to the apex remaining within the bracts, 9-10 lin. 
long. Column very short ; gland lanceolate-linear, 14 lin. long ; stipites 
short, slender, curved ; rostellum bipartite. —Angræecum bistortum, Rolfe 
in Kew Bulletin, 1893, 65. 
Upper Guinea. Lagos: cultivated specimens, Moloney ! 
Flowered at Kew in 1893. 
10. L. Aschersoni, Durand d Schinz, Conspect. Fl. Afr. v. 48. 
Plant caulescent. Leaves oblong-linear, very straight, firm, 6 in. long, 
5-6 lin. broad ; base a little dilated ; apex bilobed. Scapes half as long as 
the leaves, straight, about 6-flowered. Bracts ochreate, nearly orbicular, 
very obtuse. Flowers a third as large as those of Z. chailluana, Reichb. f. 
Sepals triangular, acuminate; dorsal straight; lateral reflexed at 
the apex, with obtuse angles on their dorsal margins. Petals much 
like the sepals. Lip also similar to the sepals but much more shell- 
shaped; spur with ample mouth, then elongated and sigmoid, with a 
double curve, and nearly as long as the pedicels. Column very short; 
rostellum descending, emarginate or slightly bipartite ; stipites 2, linear, 
a little dilated above, descending into the spur.—Angrecum Aschersont, 
Kranzl. in Mitth. Deutsch. Schutzgeb. ii. (1889) 157. 
Upper Guinea. Cameroons. 
Only known to me from the original description, but seems allied to the preceding. 
11. L. trachypus, Kränzl. in Engl. Jahrb. xix. 253. Roots very 
long. Stems about 1} in. long, thick. Leaves numerous, ensiform, 
curved, reflexed, acute, + in. long, 5 lin. broad. Racemes a little shorter 
than the leaves, secund, floriferous to the base. Bracts ochreate, obtuse 
or retuse, much shorter than the densely villous ovary and pedicels. 
Flower 5 lin. diam. Dorsal sepal large, oblong, acuminate ; lateral 
and the petals a little narrower. Lip very similar to the petals; spur 
wide, extinguisher-shaped, attenuated and suddenly hooked at the apex. 
Column very short; anther much produced, retuse ; rostellum bipartite ; 
stipites in pairs, distinct to the base. 
Upper Guinea. Cameroons: Yaunde, on trees among lichens, Zenker, 420. 
k Pe known to me from the original description, but said to be allied to L. Monteire, 
eichb. f. 
12. L. Monteiræ, Reichb. f. in Linnea, xli. 76. Stems 4 in. or more 
long. Leaves oblong, obovate-oblong or somewhat cuneate towards the 
base, 5—8 in. long, 14-1? in. broad ; apex unequally and obscurely bilobed; 
lobes obtuse. Racemes 6-12 in.long,many-flowered. Bracts broadly ovate, 
cucullate, subobtuse, 3—4 lin. long. Pedicels 6-9 lin. long. Sepals lanceo- 
late, acuminate, recurved, 5-6 lin. long. Petals a little smaller than the 
sepals. Lip lanceolate, acuminate, broader at the extreme base, 4—5 lin. 
long; spur stoutish at the base, attenuate upwards, 1}—1ł in. long. 
Column very stout, 1 lin. long; rostellum deflexed into the spur, 1} lin. 
