554 
CVIX. GRAJIINEiE. 
[ Triedia. 
mens, however, from Ben Lawers, referred to by Smith, belong to 
var. /3. . We do not know what species Dr. Parnell ( Gr. t. 40) and| 
Mr. Babington intend by their P. ctesta, which they describe with a 
perfectly fibrous root, but otherwise having all the characters of i 
our 5.; to it Mr. Babington refers E. B. t. 1719. Mr. Babington! 
attributes very short ligules to our y. as well as to a. and /8., cha- 
racterizing P. Bafourii alone by the prominent obtuse ligule ; but 
our authentic specimens of P. montana also had long ligules. Our 
S. and e. having broader spikelets than in /8. or 7., of 3 — 5 florets, 
and usually of a purplish colour, are only to be distinguished from 
each other by the web of the florets : and this is sometimes almost 
inconspicuous in Dr. Balfour’s own specimens, and disappears by ! 
cultivation. 
|| || Boot annual. 
16. P. annua L. (annual M .) ; panicle subsecund divaricate 
somewhat triangular, spikelets oblong-ovate of about 5 slightly 
remote 5-ribbed webless florets, the midrib and all the nerves 
more or less silky, upper sheath longer than its leaf, ligule ob- 
long acute, culm ascending compressed, root fibrous. E. B. 
t. 1141 : Pam. Gr. tt. 40, 41. 
Meadows and pastures, and by road-sides, everywhere. ©. 4 — 9. 
— Culms 6 — 10 inches long, below prostrate and throwing out roots. 
Leaves distichous, linear, rather blunt, flaccid, often waved, bright 
green. Glumes very unequal, ovatoOanceolate, rough at the back, 
3-nerved. Outer glumella ovato-lanceolate, acute, white and diapha- 
nous at the margin. 
27. Triodja Brown. Heath-grass. (Table VII. f. 24.) 
Panicle a nearly simple raceme. Spikelets compressed 
with 2 — 4 fertile florets. Glumes 2, about equal, 3-ribbed, as 
long as the florets. Glumellas 2; outer somewhat coriaceous, 
convex on the back, hairy at the base, 3-toothed at the sum- 
mit; teeth nearly of the same length, middle one straight 
(sometimes bristle-shaped). — Named from rpug, three , and 
oSove, a tooth. 
1. T. decumbens Beauv. (decumbent II .) ; spikelets few 
racemose, pedicels long erect, ligule a tuft of hairs. Pam. Gr. 
t. 30. Poa HVrt.; E. B. t. 792. FestucaT. Danthonia DC. 
Abundant in dry mountain-pastures, heaths, and moors. If. 7. 
— Culm 1 foot long, procumbent at the base : flowering culms only 
erect. Leaves linear, acuminate, hairy as well as the sheaths. Glumes 
nearly equal, as long as the whole spikelet, lanceolate, acute, 3-nerved 
with broad thin margins, scabrous on the keels. Outer glumella ovate, 
5-nerved or ribbed for its whole length, having a small tuft of hairs 
011 each side at the base ; apex with three teeth. Inner glumella 
obtuse, entire at the point, ciliate at the ribs and there folded. 
