Acrocephalus. | CII. LABIATE (BAKER). 
855 
leaves; special flower-bracts membranous or rigid, obovate-cuneate 
usually shorter than the flowers. 
A few additional species in Tropical Asia, Madngascar and Natal, 
Head solitary, terminal : 
Heads 1-3 at the end of the leafy branches. 
Leaves linear 
Leaves oblong 
Heads few, laxly corymbose. 
Leaves linear 
Leaves lanceolate 
Leaves oblong. 
Peduncles short . 
Peduncles long . . 
Heads many, densely corymbose. 
Basal bracts blue-purple. 
Basal bracts ovate . 
Basal bracts ovate- lanceolate. 
Bracts blue-purple at the tip . 
Bracts blue-purple at the base . 
Basal bracts pale towards the base. 
Leaves linear or lanceolate. 
Heads cylindrical. . - 
Heads globose. 
Pubescence of peduncle dark blue . 
Pubescence of peduncle grey. 
Leaves ascending. 
Hairs of peduncle long spreading 
Hairs of peduncle very short. 
Leaves thick and strongly veined 
Leaves thinner and not strongly veined 
Leaves deflexed. 
Leaves linear, small . 
Leaves linear, long 
Leaves lanceolate 
Leaves oblong or oblong-lanceolate. 
Leaves not at all coriaceous 
Leaves subcoriaceous. 
Leaves very rugose beneath . 
Leaves not rugose beneath 
Basal bracts green and foliaceous to the base. 
Leaves linear . 
Leaves linear-lanceolate 
Leaves lanceolate. 
Leaves glabrous in the upper surface. 
Veins of under surface of the leaves prominent 
Veins of under surface of leaf not raised 
Leaves scabrid on the upper surface . 
Leaves hairy on the upper surface. 
Basal bracts few, inconspicuous. 
Hairs of stem sparse, spreading . 
Hairs of stem dense, adpressed . 
Basal bracts several, sharply reflexed. 
Leaves pubescent . 
Leaves villous . 
1. 
2. 
3. 
oe 
ND 
~ 
pe 
15. 
24. 
. 25. 
. 26. 
hh RR BR RRR BR A 
he bb 
A. monocephalus. 
A. centratheroides. 
A. galeopsifolius. 
A. gracilis, 
A. succisefolius, 
A 
A 
. cylindraceus. 
. oligocephalus. 
. porphyrophyllus. 
. A. Schweinfurthit. 
. A. tododermis. 
. A. Campicola, 
. A. poggeanus. 
. polytrichus. 
venosus. 
ceruleus. 
lilacinus. 
lagoensis. 
Buetineri. 
callianthus. 
prealtus. 
lippioides. 
Heudelotii. 
Laurentit. 
reticulatus. 
dissitifolius. 
mechowianus. 
mh bh 
Welwitschii. 
sericeus. 
hyptoides. 
masuranus. 
