Fig 9. [Sand-Bur. Bur-Grass. Cenchrus tribuloides] L.
![[Sand-Bur. Bur-Grass. Cenchrus tribuloides]](#1525880611323293367_fig-009.jpg.id-8842771828119251537.wrap-0.html.html){kind=link}
Sand-Bur. Bur-Grass. Cenchrus tribuloides L. Spikelets consisting of the grain and its coverings, broad oval, somewhat flattened, about 7 mm. long, thinly covered by stiff, straight, barbed, prickles, 2–5 mm. long, making a disagreeable and formidable bur, often common on sandy land. Native of this country.
Fig 10. [Bermuda Grass. Cynodon Dactylon] L., Pers., (Capriola Dactylon (L.) Kuntze).
![[Bermuda Grass. Cynodon Dactylon]](#1525880611323293367_fig-010.jpg.id-1628949190433171320.wrap-0.html.html){kind=link}
Bermuda Grass. Cynodon Dactylon L., Pers., (Capriola Dactylon (L.) Kuntze). Floral glume enclosing the grain, smooth, light colored, oval to half-oval, 1.5 to 2 mm. long, in cross section with two long sides and a short side half as long; grain light brown, obovate to oval, a small nipple at the larger end.
The plant seeds in hot countries but not in cool, temperate regions; spreading chiefly by coarse, hard rootstocks. Introduced.
Fig 11. [Small Crab-Grass. Digitaria humifusa] Pers. Panicum lineare Kroach. Syntherisma linearis (Kroch.) Nash.
![[Small Crab-Grass. Digitaria humifusa]](#1525880611323293367_fig-011.jpg.id-6139236367324048259.wrap-0.html.html){kind=link}