CVII. GUAMINEAS. 
523 
spikelets, which are panicled (Tab. 9. f. 42. d.) racemed or spiked 
(Tab. 9. f. 42. c. e.f.g.). — A most natural Order, and one of 
the highest importance in the whole Vegetable Kingdom, com- 
prehending the true Grasses. 
A. Stamens 2. Styles 2. 
1. Anthoxanthom. Panicle spike-like. Spikelets awned, with one 
central fertile floret. 
23. Hierochloe. Panicle lax. Spikelets awnless, with one central per- 
fect diandrous floret, and a barren triandrous one on each side. 
32. Bro.mus. Spikelets panicled, awned, with 3 or more perfect flowers. 
B. Stamens 3. Style and stigma 1. Glumes 0. 
2. Narpijs. Spike simple, unilateral. Florets sessile, solitary. Glu- 
mellas 2, outer one with a long subulate point. 
C. Stamens 3 ( very rarely 1) in some or all of the florets. Styles or 
Stigmas 2. 
a. Spikelets pedicellate, panicled or racemose. Panicle often very compact, 
so as to resemble a spike. 
* Spikelets with one perfect floret ; barren florets 0 ; neuter ones, when 
present, either rudimentary or consisting of empty glumellas, much 
smaller than the perfect one. 
f Glumes 0. 
3. Leeksia. Panicle spreading. Spikelets awnless. 
f f Glumes 2. 
$ Panicle spike-like. Glumes as long as or longer than the floret. 
4. Alopecurus. Glumes awnless. Glumella 1, with a dorsal awn. 
5. Phalaris. Glumes awnless. Glumellas 2, awnless, glabrous, or 
equally pubescent, ultimately hardening. 
8. Psamma. Glumes awnless. Glumellas 2, awnless, subcoriaceous 
below, and with a tuft of short silky hairs at the base. 
G. Phleum. Glumes pointed, or with a short terminal awn, parallel. 
Glumellas 2, membranous, awnless. 
7. Lagurus. Glumes tapering into a long subulate point. Glumellas 
2, membranous; outer one with two terminal bristles, and a 
dorsal awn. 
10. Gastridium. Glumes acute, awnless. Glumellas 2, membranous, 
with a long awn below the point. 
12. Polypogox. Glumes awned. Glumellas 2, unequal ; outer one 
obtuse, awned almost at the very extremity. 
++ Panicle lax, spreading or contracted (not spike-like ). 
§ Glumes as long as or longer than the floret. 
5. Phalaris. Panicle somewhat contracted. Glumes keeled. Glu- 
mellas uniformly hairy, awnless, ultimately hardened on the 
caryopsis. 
