68 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 
The only species in the United States is Cynosurus cristatus L. (fig. 
29), known as crested dog’s-tail grass. This is occasionally sown in 
mixtures for meadows, but has nothing especially to recommend it. 
It is a tufted senate 1 to 2 feet tall, the panicles 2 to 4 inches long. 
23. ACHYRODES Boehmer. 
(Lamarckia Moench.) 
Spikelets of two kinds, in fascicles, the terminal one of each fas- 
cicle fertile, the others sterile; fertile spikelet, with 1 perfect 
floret, the rachilla produced beyond the floret, bearing a small awned 
empty lemma or reduced to an awn; glumes narrow, acuminate or 
short-awned, 1-nerved; lemma broader, raised on a slender stipe, 
scarcely nerved, bearing just below the apex a delicate straight awn; 
sterile spikelets linear, 1 to 3 in each fascicle, consisting of 2 
glumes similar to those of the fertile spikelet, and numerous distich- 
ously imbricate, obtuse, awnless, empty lemmas. 
A low, erect annual, with flat blades and oblong, one-sided, compact 
panicles, the crowded fascicles drooping, the fertile being hidden, ex- 
cept the awns, by the numerous sterile ones. Species one, a native of 
southern Europe, naturalized in southern California. 
Type species: Cynosurus aureus L. 
Achyrodes Boehmer, in Ludw. Def. Gen. Pl. 420. 1760. The genus is based on 
a phrase name of Tournefort, which Linnzeus cites under Cynosurus aureus L. 
Lamarckia Moench, Meth. Pl. 201. 1794. <A single species is described, L. 
aurea (Cynosurus aureus L.). 
Chrysurus Pers., Syn. Pl. 1: 80. 1805. <A single species, C. cynosuroides, 
based on Cynosurus aureus I., is included. 
The single species, Achyrodes awreum (.) Kuntze (fig. 30), is 
abundantly naturalized in southern California. It is called golden- 
top because of its beautiful golden yellow panicles. 
24. Metica L. 
Spikelets 2 to several flowered, the rachilla. disarticulating above 
the glumes and between the florets, prolonged beyond the perfect 
florets and bearing at the apex two or three gradually smaller empty 
lemmas, convolute together or the upper inclosed in the lower; 
glumes somewhat unequal, thin, often papery, scarious-margined, 
obtuse or acute, sometimes nearly as long as the lower floret, 3 to 5 
nerved, the nerves usually prominent; lemmas convex, several-nerved, 
membranaceous or rather firm, scarious-margined, sometimes con- 
spicuously so, awnless or sometimes awned from between the teeth of 
the bifid apex. 
Rather tall perennials, with the base of the culm often swollen 
into a corm, with closed sheaths, usually flat blades, narrow or some- 
times open, usually simple panicles of relatively large spikelets. 
Species about 60, in the cooler parts of both hemispheres; 18 in the 
United States, mostly woodland grasses. 
