evil. gkaminejE. 
551 
Poa •] 
Stiff and wiry (as much so as P. rigidu , which it resembles), branching 
from the very base, S — 4 inches high. Leaves linear, rigid, plane. 
Spikelets more or less distant, secund, lower ones sometimes compound. 
llachis grooved between the joints on the side next the spikclet, as in 
Triticum and Brachypodium. 
** Spihelets ovate or oblong-ovate. Outer glumella with 3 — 5 parallel 
jierves, herbaceous below, scarious at the end, compressed, keeled, 
pointless. Upper glume 3-ribbed. Poa. 
f Rhizome creeping or with long scions. 
9. P. compressa L. ( flat-stemmed 31.) ; creeping, panicle sub- 
secund spreading (afterwards subcoarctate), spikelets oblong of 
5 — 7 obtuse florets, upper sheath as long as or shorter than its 
leaf, culm compressed, ligule short obtuse. — a. florets usually 
connected by a web, outer glumella with 3 silky nerves and 
sometimes 2 glabrous intermediate ones. E- B. t. 365 : Pam. 
Gr. t. 37. P. subcompressa Pam. Gr. t. 90. — /3. florets not 
connected by a web, outer glumella 5-nerved. P. polynoda 
Pam. Gr. tt. 39, 91, 92. 
On walls, and in dry barren ground, frequent. Tf.. 6,7 . — One 
foot or more high, rather glaucous. Culms compressed, procumbent 
at the base: in a. the uppermost node is about the middle of the 
stem ; in 0. there are 7 or 8 nodes, of which the second is usually 
about the middle of the stem, the uppermost a little above it. Leaves 
short, linear, acute, upper one as long as or longer than its sheath. 
Panicle not much branched. Florets by no means always connected 
by a web. In 0. the two lateral nerves and the midrib of the outer 
glumella are sometimes silky, sometimes only the former, sometimes 
all are naked. 
10. P. pratensis L. {smooth- stalked, 31.); creeping, or with 
scions above ground, panicle diffuse, spikelets oblong-ovate of 
about 4 florets which are acute 5-nerved webbed, marginal 
nerves and keel of the outer glumella silky, culm and sheath 
smooth, upper sheath much longer than its leaf, ligule short. 
Pam. Gr. tt. 31, 32, 33, 34. — a. culm tall, leaves broad. E. B. 
t. 1073. — /3. leaves narrow. P. angustifolia L. — -y. subcarnlea ; 
smaller and glaucous. P. subeserulea Sm.: E. B. t. 1004 
Meadows and pastures, frequent. — 0. in shady places y. on walls 
or dry places, especially in alpine countries. If.. 6, 7. — Sheaths in 
some situations very slightly rough ; when cultivated the two lateral 
nerves of the glumella become sometimes less silky, but never quite 
glabrous. Allied to the last in character, although unlike in general 
appearance, and more resembling P. trivialis, which differs by both 
the ligule and the root, as well as by the marginal nerves of the outer 
glumella being always glabrous 0. and y. appear to be starved 
states. 
