—— 
Acrocephalus.] CII. LABIATE (BAKER). 363 
denticulate, narrowed very gradually to the base, pubescent on both 
sides. Heads globose, corymbose, }-} in. diam. ; basal bracts ovate, 
green to the base; flower-bracts pale green, pubescent, orbicular, } in. 
long. Flower-calyx 4 in. long; lips oblong. Corolla twice as long as 
the calyx, 
Lower Guinea. Angola : province of Huilla, Welwitsch, 5606! 5607! 
30. A. masuianus, Briquet in Buil. Soc. Bot. Belg. xxxvii. 80. 
A tall perennial herb. Stem robust, branched, clothed with ferruginous 
hairs. Leaves sessile, lanceolate, 2~3 in. long, acute or acuminate, 
minutely crenate, narrowed to the base, dull green and softly villous on 
both surfaces. Heads depresso-globose, forming a dense corymb; outer 
bracts broadly ovate, 4-1 in. long, deeply crenate, clothed with white 
hairs. Flower-calyx ovoid, finally 4} in. long, clothed with long hairs ; 
upper lip $-} in. long. Corolla protruded + in. from the throat of the 
calyx ; upper lip 3-lobed, nearly as long as the tube.—De Wild. & 
Durand, Ill. FI. Congo, i. t. 13. 
Lower Guinea. Lower French Congo : forest of Mayombe, Dupuis, 
31. A. Hensii, Briguet in Bull. Soc. Bot. Belg. xxxvii. 77. A 
medium-sized perennial herb, with pubescent tetragonous branches. 
Leaves subsessile, oblong-lanceolate, 2-3 in. long, entire, narrowed to 
the base, dull green, shortly pubescent and gland-dotted on both sur- 
faces. Heads cylindrical, peduncled, $ in. long; outer bracts ovate- 
oblong, foliaceous, grey-green ; flower-bracts obovate, as long as the 
calyx, clothed principally on the edge with Jong hairs. Flower-calyx 
‘iry, 4 in. long; upper lip round-ovate, entire; lower shorter, with 2 
Minute teeth. Corolla dark lilac, protruded } in. from the throat of 
the calyx ; lips much shorter than the tube. Stamens exserted. 
Lower Guinea. Lower Congo: marsh of Stanley Pool, Hens, 42. 
32. A. minor, Briquet in Engl. Jahrb. xix. 169. Stem dwarf, 
clothed with adpressed hairs. Leaves sessile, oblong-lanceolate, above 
1 in. long subacute, narrowed to the base, distantly toothed, green and 
pilose on both surfaces. Heads forming a lax corymb, depresso-globose, 
-} in. diam.; basal bracts green, ovate. Flower-calyx 4 in, long. 
Corolla protruding 3-1 in. from the throat of the calyx; lips very 
Small. Stamens exserted. 
Lower Guinea. Angola, Welwitsch, 5605! (5905 ex Briquet by error). 
33. A. elongatus, Briquet in Engl. Jahrb. xix. 14 1. Stem tall, 
robust, branched, green, slightly pilose ; internodes long. Leaves 
petioled, ovate or oblong-lanceolate, 14-24 in. long, acuminate, narrowed 
to the base, regularly crenate or dentate; green and slightly hairy on 
both surfaces. Heads globose, sessile or subsessile, forming a congested 
panicle 3-4 in. long; flower-bracts like reduced leaves in colour and 
