LABlATiF,. (mint FAMILY.) 343 



21. DracocephnlHin. Stnmcns nearly as in the pnrceding. Calyx Btmisht, the upper 



lip or mipcr tooth coiiinionl.v larger. 



22. Ce«lr«ni«-Iln. Staiiions all asceudini;. Anther-rolls panillel. 



Tribe V. STACIIYDK^. Stamens 4, ascending and parullel ; the inferior (outer) 

 pair iDiiiftT than the superior, except in No. 33. Anthers usually approximate iu pairs. 

 Corolla 2-lippeil ; the upper lip concave or arched, (,'alyx 5 - lO-ncrved. 



• Calyx not 2-lipped, thin and membranaceous, inflatcd-bell-.ihaped in fruit. 



23. Sy nam! III. Calyx almost equally 4-lobed 1 Arither-oells widely divergent. 



24. PI>y8oate(;la. Calyx 5-toothed or 5 lobed. Anther-cells panillel. 



• ♦ Calyx 2-lipped, closed in fruit. 



25. Brunella. Calyx nerved and veiny ; upper lip flat, 3-toothed, the lower 2-cleft. 



26. Siculellaria. Calyx with a helmet-like projection on the upper side ; the lips entire. 



• * • Calyx not 2-lipped, nor the tube inflated, 5-10 toothed. 

 4- Stamens included in the tube of the corolla. 



27. MniTubluin. Calyx tubular, 5 - 10-uerved, and with 5 or 10 awl shaped teeth. 



4- 1- Stamens projecting beyond the tube of the corolla. 

 ♦* Anthers opening tninsversely by two unequal valves ; the smaller valve ciliate. 



28. Galeopsis. Calyx tubular-bell-sbaped ; the 5 teeth spiny -pointed. 



« ++ Anthers opening leugtlnvi.-^e. 



29. Stachys. Calyx tubuhir-bell-shaped. Nutlets rounded at the top. Stamens after 



shedding the pollen often turned downward. 



30. L.<-oiiiirii)i. Calyx top-shaped, the rigid and spiny-pointed teeth soon spreading. Nut- 



lets trun ate and acutely 3-angled at the top. 



31. Laiiiiiiin. Calyx-teeth not spiny-pointed. Nutlets sharply 3-anglcd, truncate at the top. 



32. Ilallula. Calyx somewhat funnel-form, the 5 -10 teeth united at the base into a spread- 



ing border. Nutlets roundish at the top. Upper lip of the corolla erect. 



33. Plilouiia. Calyx tubular, the 5 teeth abruptly awned. Upper lip of the corolla arched. 



1. TEUCRIUM, L. Gekm.vnder. 



Calyx 5-tootlicfl. C'oroll.T witli the 4 nppiM- lolics nearly equal, oblong, turned 

 forward, po that there .';ecnis to lie no iqijicr lip , the lower one iniieh larger. 

 Stamens 4, exserted from the deep cleft hetween the 2 upper lobes of the corolla : 

 anther-ecll.-^ confluent. (Named for Tencer, king of Troy.) 



1. T. Canad6nse, L. (A.mkrican Gkr.m.wder. Wood S.voe.) Her- 

 baceous perennial, downy ; stem erect (l°-3° high); leaves ovate-lanceolate, 

 serrate, rounded at the base, short-petiolcd, hoary undcrnciith; the floral scarcely 

 longer than the oblique unequally-toothed calyx ; whorls about 6-flowered, 

 crowded in a long and simple wand-likc spike. — Low grounds: not rare. 

 July- Sept. — Corolla pale purple, rarely white. 



2. TRICHOSTEMA, L. Bue Crni.s. 



Calyx bell-shaped, oblitjue, deeply ."i-deft ; the .3 upjier teeth elongated and 

 partly iiniled, the 2 lower very .'<hort. Corolla 51oi)ed ; the lobes narrowly ob- 

 long, declined, nearly equal in lenjrth ; the .'{ lower more or less united. Sta- 

 mens 4, with very long capillary filaments, exscrted much beyond the corolla, 

 curved: anther-cells divergent and at lrn'.:th conlliient. — Low annuals, some- 

 what clanjmy-glandular and balsamic, branched, with entire leaves, and mostly 

 solitary 1 -flowered j)cdicels terminating the branches, becoming lateral by the 

 production of axillary branchlets, and the flower appearing to be reversed. 



