calycem sub^equante, bilabiata, labio superior! erecto piano integro vel brevissime emar- 

 ginato, inferiori patente trifido. Stamina 4, distantia. Antherarum loculi paralleli. 

 I do not think that the genus Brachystemum Michx. can be separated from this one. 



16. Satureia. Linn Flores verticillati vel capitati. Calyx 10-striatus, aequalis, 



5-dentatus, fauce intus nuda. Corolla tubo calycem subaequante, bilabiata, labio superior! 

 suberecto piano emarginato subbifido, inferiori patente trifido. Stamina 4, distantia. 

 Antherarum loculi paralleli. 



The Satureia Thymbra Linn, has the stamina approximate under the upper lip, and 

 must therefore be excluded from this genus. The section Thymaria {Dec. et DUby bot. 

 gaU. p. 370) cannot, in my opinion, be distinguished from Thymus. The section Sabattia, 

 Mcench, forms my genus Micromeria. The genus Sature'ia would thus be confined to the 

 S. hortensis, montana, and perhaps one or two others among those which I have not yet 

 had an opportunity of examining. 



17. Micromeria. Benth. — Flores verticillati vel capitati. Calyx 10- vel 15-striatus, 

 tubulosus, dentibus 5 subsequalibus, intiis fauce villosa. Corolla tubo calycem sub- 

 aequante, bilabiata, labio superior! erecto piano emarginato, inferiori patente trifido. 

 Stamina 4, distantia. Antherarum loculi paralleli. 



This genus comprehends the Sabattia of Moench (a name which I could not adopt, on 

 account of the older genus of the same name in the order of Gentianese), and most of 

 the species of Persoon's section Zygis of the genus Thymus; probably also the South 

 American Bystropogons with verticillate flowers. 



18. Thymus. Limi Flores verticillati vel capitati. Calyx 10-striatus, ovato-tubu- 



losus, bilabiatus, labio superior! 3-dentato, inferiori bifido, intiis fauce villosa. Corolla 

 tubo calycem subaequante, bilabiata, labio superior! erecto subplano emarginato, inferiori 

 patente trifido. Stamina 4, distantia. Antherarum loculi parallel!. 



This genus would thus be reduced to Persoon's section Serpyllum. 



19. Origanum. Linn — Florum spicaj tetragonae, strobiliformes, bracteis imbricatis. 

 Calyx varius. Corolla tul)o calycem subaequante, bilabiata, labio superior! erecto sub- 

 plano emarginato, inferiori patente trifido. Stamina 4, distantia. Antherarum loculi 

 paralleli. 



These six genera are so closely allied as to be scarcely distinguishable. The corolla 

 and stamina are nearly the same in all, the length of the stamina being too variable even 

 in the same species to serve as a generic character. The inflorescence and calyx alone, 

 characters of minor importance in the order of Labiatae, can serve to separate them. 



20. Lophanthus. Benth Supra. 



§ 2. Antherarum loculi divaricati. 



21. Hyssopus. Linn Calyx tubulosus, subaequalis, 5-dentatus. Corolla tubo calycem 



subaequante, bilabiata, labio superior! erecto emarginato, inferior! trifido : lobis lateralibus 

 suberectis, medio emarginato subbifido, laciniis divergentibus. Stamina 4, exserta, dis- 

 tantia. Antherarum loculi lineares, divaricati." 



