Ajuga.\ DIDYNAMIA — GYMNOSPERMIA. 221 



CLASS XIV.— DIDYNAMIA. 



4 Stam. ; 2 longer than the other 2. 



ORD. I. GYxMNOSPERMIA. Germen or pericarp deeply A- 

 lobed, or apparently of ^ seeds; yj/M'^cg, naked, and c-i^ij.a, the 

 seed. (All belonging to the Nat. Ord. Labiate, Juss.) 



Tribe 1. Tube of the Cor. scarcely longer than thecal., its limb 

 4 — o-clcft, nearly regular. Stam. distant. Menthoideje, 

 Benth.i 



1. Mentha. Cal. equal, 5-toothe(], its mouth naked or rarely 

 villous. Cor. nearly regular, 4-cleft, its tube very short. Stam, 

 distant, exserted or included. Filaments naked. Anthers with 

 2 parallel cells. Benth. — Name, — ,a/vt'c4 or iu\h„ an ancient Greek 

 term. 



Tkibe II. Corolla two-lipped, the tube about as long as the calyx : 

 lips nearly equal in length ; tipper one nearly plane. Slam, 

 distant. Satureike.e, Benth. 



2. Thvmls. Floxcers whorled or capitate. Cal. with lOrihs, 

 tubular, 2-lipped : upper lip 3-toothed ; lower one bifid, the 

 throat hairy. Cor. with the upper lip erect, nearly plane, notch- 

 ed, lower patent and trifid. Benth. — Named ^jiloz, strength ; 

 from its balsamic odour, strengthening the animal spirits. 



3. Origanum. Spikes (or heads) of flowers 4-sided, resem- 

 bling a catkin, imbricated with bracteas. Cor. with the upper lip 

 erect, nearly plane ; lower one patent, trifid. Benth. Name, 

 o'^oi, a hill, and ya\o:, joy ; from the dry hilly places of which 

 the species are the ornament. 



Tribe III. Upper lip of the Corolla abbreviated or apparently 

 tcanting. Stamens much exserted. Ajugoide^, Benth. 



4. Teucrium. Cal. tubular, 5-toothed, nearly equal or 2- 

 lipped. Cor. with the upper lip bipartite ; lower one patent, 

 3-fid. Stam. much exserted. Cells of the anthers confluent, 

 spreading. — Named from Teucer, Prince of Troy, who first 

 employed this plant medicinally. 



5. Ajijga. Cal. ovate, nearly equal, 5-cleft. Cor. with the 

 tube exserted : upper lip short, erect, entire or emarginate ; 

 lower one larger, patent, trifid. Stam. 4, ascending, protruded 

 above the upper lip. — Name altered from the Abiya, (abigo, 

 to drive away) of the Latins, a medicinal plant allied to this. 



Tribe IV. Cor. 2-lipped. Stame7is ascending, shorter than the 

 upper lip. Nepetex, Benth. 



1 1 have liere availed myself of the excellent arrangcnieut of the L' hiata:, 

 pabiished iu the Bot. Registtr, t. 12S2, et seq. 



