190 POPULAR FIELD BOTANY. 
conspicuous. The seeds, when roasted, are recommended 
as a substitute for coffee. 
Tris F@TIDIssIMA, has a dull purple-coloured flower, and 
is much smaller than the last. The leaves, when bruised, 
yield a very disagreeable smell. It is very common in 
Devonshire. 
TRIANDRIA. MONOGYNIA. 
GLUMACES. GRAMINACES. 
NARDUS. (Mar-erass.) 
Generic Character. No calyx. Corolla of two-valves. Spikelets 
in two rows on one side of the stalks. 
Narvus stricta. Mat-grass. This little grass is abun- 
dant on moors and heaths. It grows in little tufts, and is so 
stiff that cattle will not eat it. Spike of flowers long, erect, 
the florets all pointing one way. 
TRIANDRIA. DIGYNIA. 
GLUMACE. GRAMMACES. 
PHLEUM.  (Cav’s TAIL e@Rass.) 
Generic Character. Panicle compact. Calya of two nearly 
