6 DIMENSIONS [CH. 
(Figs. 8—13). Further, the stems themselves are usually 
terete, and distinctly hollow except at the swollen nodes, 
and only branch low down at the surface of the ground or 
below it’. 
All our native grasses are herbaceous, and none of 
them attain very large dimensions. In the following lists 
I term those small which average about 6—18 inches in 
the height of the tufts, whereas those over 3 feet high 
may be termed large, the tufts being regarded as in 
flower. The sizes cannot be given very accurately, and 
starved specimens are frequently found dwarfed, but in 
most cases these averages are not far wrong for the 
species freely growing as ordinarily met with, and in 
some cases are useful. I have omitted the rare species 
throughout, and in the annexed lists have added the 
popular names. 
LARGE GRASSES. 
(Over 3 feet.) 
Milium effusum (Millet-grass). 
Digraphis arundinacea (Reed-grass). 
Aira cespitosa (Tufted Hair-grass). 
Arrhenatherum avenaceum (False Oat). 
Elymus arenarius (Lyme-grass). 
Bromus asper (Hairy Brome). 
B. giganteus (Tall Brome). 
Festuca elatior (Meadow Fescue). 
F. sylvatica (Reed Fescue). 
Glyceria aquatica (Reed Sweet-grass). 
G, fluitans (Floating Sweet-grass). 
Arundo Phragmites (Common Reed). 
1 Tropical Bamboos branch in the upper parts and are woody. 
Dinochloa and Olyra are climbing grasses. 
