Leucas. | CII, LABIATA (BAKER). 473 
with a very short upper lobe. Nucules ovoid-triquetrous.—Annual or 
perennial herbs or undershrubs. Leaves entire or toothed; upper floral 
leaves like the others or reduced. Whorls few or many- flowered , usually 
remote. Corolla pallid; upper lip densely clothed with white hairs. 
Species about 100, spread through the tropical regions of the Old World, one also 
American, 
*ASTRODON, Benth. Calyx-tube not oblique at the throat. 
Bracts large. 
Leaves sessile or subsessile. 
Leaves linear . 1. L. cephalantha. 
Leaves lanceolate . . . . . . 2. L. Stormsii. 
Leaves ovate. 
Whorls 1-3 . . . . . . 3. L. menthefolia, 
Whorls many. 
Calyx 3 in. long 4, L. myriantha, 
Calyx 4 in. long 5. L, masukuensis. 
Leaves obovate-cuneate , . : . . 6. LZ, cunetfolia. 
Leaves petioled. 
Leaves ovate-lanceolate . 7. L, usagarensis. 
Leaves ovate. 
Whorls distant . . 8. L. nubica, 
Whorls crowded into a terminal head . . 9. L. microscypha. 
Leaves obovate-cuneate. 
Perennial. 
Whorl 1, terminal . . . . . 10. L. masaiensis. 
‘Whorls few, axillary . . . . 11. LZ. venulosa. 
‘Annual . . . . 12. L. Elliotii. 
Bracts small. 
Calyx-tube campanulate. 
Whorls 3—4-flowered —. . . . . 18. L. Pechueli, 
Whorls many-flowered. 
Leaves oblong. : . . . . 14, L. altissima. 
Leaves suborbicular_ . . . . . 15. L. inflata. 
Calyx-tube funnel-shaped. 
Leaves lanceolate, shortly petioled . . 16. L. Jamesii. 
Leaves lanceolate or oblong-lanceolate, sessile . 17. L. milanjiana, 
Leaves suborbicular . . . . . 18. L. Welwitschii. 
Imperfectly known species . . . . . 19, L. tomentosa. 
**PLAGIosTOMA, Benth. Throat of calyx-tube oblique, 
produced on the upper side. . 
The only species . 20. L. martinicensts. 
*“ LOXOSTOMA, Benth. Throat of calyx-tube oblique, 
produced on the lower side. 
tBracts obsolete. 
Annual 
Perennial . 
ttBracts minute. 
§ Leaves sessile or subsessile. 
Leaves oblong-lanceolate . 
Leaves oblong 
Leaves ovate. 
Calyx 4 in, long 
. 21, L. ebracteata, 
, 22. L. Holstii. 
. 23. L. neuflizeana, 
. 24. L. Schweinfurthit. 
. 25. L. concinna. 
