21 



I 



Plantssparinglybrancliecljbranches 



erect, stigma sessile : — 

 Plants slender, bracts small, 



subulate, perianth 1-5 mm. 



long 

 Plants stout, bracts leaf -like. 



/ 



perianth above 2 Bim. long T. inacrostachi/inn. 



7 



T, aggregatuui. 



2. Flowers in beads or short spicatc clusters : 



Flowers in rounded heads or dense 



compact spikes with imbricate 

 conspicuous bracts, perianth-seg- 

 ments with an apical beard of stiff 

 comb-like hairs : — 

 Bracts distinctly toothed on margins : ■ 

 Upper leaves numerous, lanceolate, 



recurved at tip 

 Upper leaves few, subulate, ascend- 



mg 

 Bracts rpiite entire, usually reddish- 

 brown when drv : — 

 Spikes stout, oblong or subcnpitate, 



bracts broadly ovate, plants 



leafy: 



Spikes mostly oblong, bracts 



broadly ova te , sh a rply 

 keeled, upper leaves linear- 

 subulate ;. T.spicatum, 



Spikes mostly depressed-capi- 

 tate, bracts lanceolate, not 

 sharply keeleil , upper leaves 



liuear' T. hatlnj^^clnsium. 



Spikes rather slender, often elon- 

 gated, bracts linear-lanceo- 

 late, i^lants witli few leaves.. T.siihnudun). 



3. Flowers in more or less lax heads or- 



spicate clusters., bracts incon- 

 spicuous, pt-rianlh-segmenls with 



dense w^ooUy beard : — 

 Style above 0-5 mm. long T. cJatnf.^. 



Stigma sessile : — ^ t jt' - 



Bracts with frincred nuiigins ... T. t risen. 



Bracts with entire margins:' 



Leaves more or less crowded, ad- 

 pressed to stem , somewha t 



fleshj 



ft I • 



•-. ••• ••• 



2\ aiinnlatum. 



Leaves scattered spreading: — 

 Leaves narrowly Unen.r, flmver- 



lieads globose, few-flcvx-ered T. hmrlnjgync. 



Leaves broadly linear, flowers in 



ovoid spikes, many-flowered T. Pafersonae. 



