Listrostachys. | CXXXIII. ORCHIDE# (ROLFE). 153 
Leaves 24-4 in. long. 
Sepals and petals 3 lin. long . t . 44. L. glomerata. 
Sepals and petals 13-2 lin. long. . 45. L. Braunii. 
ttLeaves equitant or ensiformly compressed. 
Flowers in slender racemes. 
Scapes 5 in. long . : . 46. L. Batesii. 
Scapes 2-3 in. long. 
Racemes longer than the leaves. 
Leaves 13-2 in. long, subacute . . 47. L. Zenkeri. 
Leaves 1 in. long, obtuse . i . 48. L. iridifolia. 
Racemes much shorter than the leaves . 49, L. forcipata. 
Flowers in short, lax, subcapitate racemes . 50. L. dactyloceras. 
t+}Leaves terete or subterete (unknown in 52). 
Lip broadly ovate, subobtuse or apiculate . 51. L. subulata. 
Lip dilated in front into two large rounded 
lobes . . : 4 e S . 52. L. filiformis. 
1. L. caudata, Reichb. f. in Walp. Ann. vi. 907. Stems short, 
about 8-leaved. Leaves linear-oblong, very shortly bilobed, 6-10 in. 
long, 1-1} in. broad ; lobes obtuse, recurved. Scapes pendulous, 9-12 
in. long; racemes flexuose, 6-10-flowered. Bracts broadly rounded, 
obtuse, 14 lin. long. Pedicels } in. long. Sepals triangular-lanceolate, 
acuminate, 11-1} in. long. Petals similar to the sepals, but about three- 
fourths the size. Lip trilobed, obovate from a cuneate base, 1} in. long, 
ł-1 in. broad; side lobes irregularly toothed above; front lobe triangular- 
subulate, acute ; spur elongate, narrow, flexuous, )—10 in.long. Column 
clavate, 6-7 lin. long ; rostellum with long subulate beak, 4 lin. long; 
stipites of pollinia 4 lin. long, united at the extreme base; gland small and 
rounded.— Angraecum caudatum, Lindl. Bot. Reg. t. 1844; Bot. Mag. 
t. 4370; Reichenbachia, ser. i, ii. 41, t. 67; Garden, xxxix. t. 804; 
Will. Orch. Alb. viii. t. 358 ; Orchidophile, 1887, 80, with plate. 
Upper Guinea. Sierra Leone, Loddiges! Whitfield! Afzelius ! Niger Delta: 
Brass, Barter, 1858! 
2. L. chailluana, Reichb. f. in Flora, 1885, 381, in note. Stems 
erect, 6 in. or more high, many-leaved. Leaves about 1 in. apart, 
oblong, unequally and shortly bilobed, very coriaceous, 45—9 in. long, 
1-1} in. broad; lobes obtuse. Scapes axillary, 6-9 in. long, many- 
flowered. Bracts broadly ovate, subacute, concave, 6-8 lin. long. 
Pedicels 14-2 in. long. Sepals triangular-lanceolate, acuminate, re- 
curved, 11-1} in. long. Petals a little shorter and narrower than the 
sepals. Lip much like the petals, but slightly broader and obscurely 
angled at the base; spur narrowly conical at the base, elongate, and 
narrowed upwards, 4—54 in. long. Column stout, 4 lin. long; pollen 
with 2 slender stipites and 1 elongated gland ; rostellum long, deflexed. 
—Angrecum chailluanum, Hook. f.in Bot. Mag. t. 5589 ; Veitch, Man. 
Orch. vii. 124. A. arcuatum, Lindl. in Journ. Linn. Soc. vi. 136 (not 
in Hook. Comp. Bot. Mag.). 
Upper Guinea. Lagos, Millen, 193! Niger Delta: Nun River, Mann, 521! 
Cameroons: Buea, Preuss, 372! 
