52 NATURAL ORDERS AND 
GENERA. 
Stamens two. 
Corolla tubular, four-cleft, nearly equal. Lycopus, v. 1. p. 23. 
Corolla labiate, lower lip three lobed, 
the upper CONCAVE......ceccecseeee SALVIA, V. 1. p. 23. 
Stamons four. 
Upper stamens longer than the lower. 
Calyx five toothed....cccccccrsssesssssees NEPETA, V. 2. p. 809, 
Calyx two lipped. 
Flowers with linear bracteas_ ...... CLinopopiuM, v. 2. p. 806. 
Flowers without linear bracteas ... CaALAMINTHA, V. 2. p. 808. 
Upper stamens shorter, or equal to the 
lower. 
Corolla tube not longer than the 
calyx, limb nearly equal. 
Lamb four-cleft ....00s-0-se00 csececes MENTHA, V. 2. P70 he 
Limb five-cleft, obscurely two lipped 
Calyx two lipped, the upper 
three toothed, patent ...... THymus, v. 2. p. 804. 
Calyx tubular, five toothed, 
nearly equal ....c.ercecesreese ORIGANUM, V. 2. p. 805. 
Corolla apparently one lipped. 
Upper lip minute .......csscessoveease AJUGA, V. 2. p. 830. 
Upper lip with deflexed lobes, or 
very short and erect .........0. TEUCRIUM, V. 2. p. 832. 
Corolla tube much longer than the 
calyx, distinctly two lipped. 
Calyx two lipped. 
Lips both entire ...ccccsecsesseeee OOUTELLARIA, V. 2. p. 828. 
Lower lip two lobed.....0.....0.. PRUNELLA, V. 2. p. 829. 
Calyx with three or four rounded 
Teafy TODES”...cccecceccsqeveees MELITTIS, V. 3. Ps Goes 
Calyx regularly five to ten toothed, 
not two lipped. 
Stamens longer than the tube of 
the corolla. 
Corolla with its throat in- 
flated. 
Lower lip of three unequal 
LODES ereccsececseasceee GALEOPSIS, V. 2. p. SEB. 
Lower lip two lobed......... Lamium, v. 2. p. 811. 
Corolla with a cylindrical tube 
Upper lip very hairy ...... Lzonurvs, v. 2. p. 825. 
Upper lip not very hairy. 
Calyx ovate ......esce000. BETONICA, V. 2. p. 818. 
Calyx campanulate. 
