131 
TY'PHA. 
‘Spike not, or scarcely, divided into two parts. >} 
[ latifolia. Greater Reed-mace. ) 
Spike in two distinct parts, with about an inch between. ) 
angustifolia. Lesser Reed-mace.) 
U'LEX. 
c Calyx with spreading hairs, the little bracts below it 
| nearly } inch long; spines rough. 
Calyx with short hairs pressed close to the surface, the 
bracts minute; spines smooth. 
nanus. Dwarf Furze. 
UL™MUS. 
p=! chiefly above the middle of the fruit, and 
> 
europe'us. /urze, Go rse. 
y 
near the notch; leaves about 13-3 inches. 
campestris. Common Elm. 
Seed-cavity chiefly below the middle, far from the notch ; 
leaves about 3-5 inches. } 
monta/na. Wych Elm. 
URTI'CA. 
Flowers (some of them) collected in spherical heads. } 
( pilulif’era. Roman Nettle. 
Flowers not in globular heads. 
Flowers in long, branched clusters; leaves widest He 
f their base, hairy (besides the stings). 
L dioica. Common Nettle. 
Flowers in short clusters; leaves widest near their 
middle, almost without hairs, except the ea 
stinging ones. urens. 
UTRICULA‘RIA. 
Bladders borne on the segments of the leaves. 
-Leaves 1-2 inches long; flowers with a projecting 
| ‘“‘palate,’’ and a longish, conical spur. ( 
vulgaris. Bladderwort. 
“Leaves +-} inch long; spur scarcely longer than it is 
wide; palate almost flat. } 
minor. 
Lladders on separate branches from the leaves; flowers 
with a spur nearly equalling the under lip. 
interme'dia. 
