— 125 



b^. Spikes twice as thick, bracts rounded or acute, herb puberulous 

 or tomentose: Z. odorifenim. 



b. Spikes elliptic or ovate or oblong, 

 a". Bracts with inflexed margin, striate, bracts of the peduncle 

 distanced, ligula bipartite or bifid with ovate rounded lobes, 

 5—20 mm. long. Spikes squarrose. 

 a^ Bracts truncate or broadly rounded. 



a^. Leaves linear-oblong, not tapering to the base, P= or 

 less. Spikes 200X150 or smaller. 



Herb glabrous or subglabrous: Z. macradeniiim. 



b^. Leaves oblanceolate-linear, tapering to the base P 5—7. 

 Spikes 100X55 to 180X60. Z. neglectiim. 



b^ Bracts pointed or lanceolate, 

 a-'. Bracts orbicular, apiculate. Spikes 100X70 or smaller. 



Leaves oblanceolate linear: Z. inflexum. 



b^. Bracts lanceolate apiculate, (cymbiform). Leaves large (650X 

 120) oblong, Spike very squarrose, 153 X 100: Z. Lörzingii. 

 b'. Bracts not Inflexed or oniy at the top. Spikes not squarrose, 

 Ligula large, entire. 



a-. Bracts inflexed only at the top and split, rounded, for the 

 rest margins appressed, leaves large glabrous, ligula entire very 

 broad 10 mm., or shorter: Z. Ottensii. 



b^, Bracts appressed wit the entire broad margin. Ligula 15 mm., 

 or longer. 



a-*. Spikes ovate or elliptic, obtuse or subacute, sometimes 

 oblong conical. 



a\ Leaves not very hairy beneath, mostly subglabrous, mean 

 size 300X80, ligula 20 mm. long. Bracts rounded, margo 

 broad membranous, whitish not villous. Mean size 70—90 

 mm. X 30—40. Varies with oblanceolate leaves tapering 

 to the petiole, (flowers cream coloured): Z. Zçriimbet. 



h*. Spikes mean size smaller. Bracts rounded or acute, margo 

 narrower not whitish in sicco, villous. Mean size 50 — 70 

 but sometimes prolongate at the end of the season. Leaves 

 subglabrous broader, meansize 300 X 90, ligula 25. (flowers 

 orange-coloured) : Z. aromaticum. 



c"*. Spike ovate-oblong acute, Bracts acute. Margo villous. 

 Leaves oblong-lanceolate, meansize 200X35, lower side 

 of leaf arachnoideous villous, (flowers pale yellow): 



Z. amaricans. 



b-^ Spikes fusiform, bracts obtuse very thin, rather loose, mar- 

 gin narrow, leaves not surpassing 200 X 40. 



