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BRIZA MEDIA,— ARRHENATHERUM ELATIUS,_ 
HOLCUS LANATUS,— POA TRIVIALIS. 
NAT. CDASS,—MONOCOTYLEDONES; ORDER, GRAMINEÆ. ART. CLASS,- 
TRIANDRIA ; ORDER,-DIGYNIA. 
The four species of the very extensive family of 
the Grasses which are here figured are named 
Dodder Grass (Briza media) ; Common Oat-like Grass 
(Arrhenatherum elatius); Meadow Soft Grass (Holcus 
lanatus); and Rough-stalked. Meadow Grass (Poa 
trivialis). The description of the Grasses requires a 
peculiar set of technical terms, because the parts of 
the perianth hâve a very different appearance from 
those of a calyx and corolla in other flowering plants. 
There are generally three stamens and a pistil, sur- 
rounded by husk-like scales, termed chaff (paleœ), 
and these again are invested by other scales, termed 
glumes (glumœ). The stalks also hâve a peculiar 
structure, being knotted at intervals, and most fre- 
quently hollow between the joints. The shining polish 
k 3 
