12 



Flowers.iii nwve or less definite 

 tevmiiral ^^ iii^orescences, 

 bract.s more or less adnaie 

 io pedicels, braeteoles 

 about equal in leug-tli to 

 bracts : — 



Periantli-segmeiits g'labrous, 

 niucli branclied herbs 

 or subslirubs : 



Slender subprostratelierbs, 



leavosuaiTowly linear, 



acuminate, ascending 7, ncttths^im u m 

 Stout subslirub.s,' leaves 



broadly linear, sab- 

 . ^ acute, recurved ... /. squairosfnn. 



Pcru)nt}i - segments witli 

 papillose margins, stout 

 erect sLrubs; — 

 Plants densely leafy, 



brants andl)racteoles 



long-er tlian flower... T.folioxuin. 

 . . Plaiits with fe^v scattered 



leaves, bracts and 

 bracteoles sliortcr 



P TM , . • ... tlian flowers ... T. fndicosinn, 



^. i' lowers m axillary cvmules arranged in 



many-flowered cymose Leads," elon- 

 gated spikes or more or less dense 

 racemes or panicles of cynniles:-- 



• ■ • . . , 



Plant spinons 



Plant not spinons :• 



a. riusvers aggregated in compact ter- 



inmal niMny-flowcred racemose 

 neads : — 



Leaves and bracts broadly ovate- 



/ 



(^ 



lanceolate, leaves amplexicanl T. runhorhloldes 

 Loaves acicular, terete r ':^':7;'/^^'^^^' 



-owers in axillary cynr^Wfornnm; '• ^""^^''''"'• 



elongated determinate spikes o^i- 



racemes, plants erect :~ 

 Cymnles sessile in bract axils 

 bracts miicli longer tliaii 



cy mules 



/ 



V 



Cymules sliortly pedunculate, coin- 

 pact, bracts sliortcr than 

 cymules :~~ 



Stems winged . -r 



^ Stems not winged "" '" i-^pouhsum, 



Flowers in indetenuinate k-aucl/ed ^^ '^"^^"""^^^• 



racemes, cymules 3-5-flrd. ped- 

 ^ncles elongated, divari;ate1v 



branched, plants sea ndent--!' 

 Leaves and bracts l-2-i cm . Ioup- • - 



^^^^-es and bracts broadly linear 



or Unetir lanceolat 



a 



r. trif 



