Figure 713. — Tragus racemosus, 

 (Griffiths 1529, Ariz.) 



X 1. 



484 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



nerved, about as long as the fertile 

 floret. O — Escaped from experi- 

 ment station plots, Florida (Gaines- 

 ville); a common weed in tropical 

 America. 



94. ZOYSIA Willd. 



(Osterdamia Neck.) 



Spikelets 1-flowered, laterally com- 

 pressed, appressed flatwise against 

 the slender rachis, glabrous, disar- 

 ticulating below the glumes; first 

 glume wanting; second glume cori- 

 aceous, mucronate, or short-awned, 

 completely infolding the thin lemma 

 and palea, the palea sometimes ob- 

 solete. Low perennials, with creeping 

 rhizomes, short, pungently pointed 

 blades, and terminal spikelike ra- 

 cemes, the spikelets on short ap- 

 pressed pedicels. Type species, Zoysia 

 pungens Willd. Named for Karl von 

 Zois. 



Several years ago a species of this 

 genus was introduced into the United 

 States as a lawngrass under the names 

 Korean lawngrass and Japanese lawn- 

 grass. It was recommended for the 

 Southern States and was said to be 

 hardy as far north as Connecticut. 

 The species then introduced appears 

 to be Zoysia japonica Steud. Recently 

 a fine-leaved species, Zoysia tenuifolia 

 Willd. ex Trin. (Mascarene grass), 

 has been introduced in Florida and 

 southern California (called in the 

 latter region Korean velvet grass) and 

 has given favorable results. These 

 species may escape from cultivation. 

 The original species, Z. matrella (L.) 

 Merr. (Z. pungens Willd.), Manila 

 grass (fig. 714.) common in the 

 Philippine Islands, has been used in 

 recent years for lawns from the Gulf 

 States to Long Island, propagated 

 by cuttings. The spikelets are about 

 2.5 mm. long and 0.8 mm. wide. But 

 little seed is produced. Sometimes 

 called "Flawn." 



In Z. japonica (Japanese lawn- 

 grass) the blades are flat and rather 

 stiff, 2 to 4 mm. wide, the spikelets 

 about 3 mm. long and a little more 



2. Tragus racemosus (L.) All. (Fig. 

 713.) Differing from T. berteronianus 

 in the larger burs, the spikelets 4 to 

 4.5 mm. long, in the acuminate apex 

 projecting beyond the spines, and 

 in the pediceled burs. O (Nazia 

 racemosa Kuntze.) — Waste ground 

 and on ballast at a few places from 

 Maine to North Carolina; Texas to 

 Arizona; introduced from the Old 

 World. 



ANTHEPHORA Schreb. 



Spikelets with 1 perfect floret and 

 a sterile lemma below, in clusters of 

 4, the indurate first glumes united 

 at base, forming a pitcher-shaped 

 pseudo-involucre, the clusters sub- 

 sessile and erect on a slender, flexuous, 

 continuous axis, deciduous at ma- 

 turity. Type species, Anthephora ele- 

 gans Schreb. (A. hermaphrodita). 

 Name from anthe, blossom, and 

 pherein, to bear. 



Anthephora hermaphrodita (L.) 

 Kuntze. Leafy ascending or decum- 

 bent annual; culms mostly 20 to 50 

 cm. tall; blades flat, thin, 5 to 10 

 mm. wide; spikes erect, 5 to 10 cm. 

 long; first glume 5 to 7 mm. long, 

 about 9-nerved; second glume nar- 

 row, acuminate, shorter than the 

 first, pubescent; sterile lemma 5- 



