328 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
4, Echinochloa walteri (Pursh) Heller, Cat. N. Amer. Pl. ed. 2. 21. 
1900. 
Panicum hirtellum Walt., Fl. Carol. 72. 1788. Not P. hirtellum 
L., 1759. South Carolina. 
Panicum walteri Pursh, Fl. Amer. Sept. 66. 1814. Based on P. 
hirtellum Walt. 
Annual; erect, often succulent and rooting at the lower nodes when 
erowing in mud or water, 1 to 2 m high, as much as 2.5 cm thick at 
base; sheaths papillose-hispid, or papillose only, rarely glabrous, the 
collar more or less pubescent; ligule wanting, the ligular area often 
pubescent; blades usually 10 to 15 mm wide sometimes as much as 
3 cm wide, mostly scabrous on both surfaces; panicle dense, as much 
as 30 cm long, erect or nodding; racemes appressed or ascending, 
approximate or the lower somewhat distant, as much as 10 cm long; 
iene ohoneyy uiTeneed 
TRAIAN J a: mostly long-awned, oiten purple, 
NY IN| NY Wh Ys QE. i about 3 mm long; sterile lemma 
SON Ys) { with an awn usually 1 to 2 cm 
: i Li WF (HZ oy # long, sometimes longer, rarely 
NN Q IY iif 77 reduced to a short point (fig. 300). 
Yj; Marshes, lagoons, and wet 
AN places, eastern United States; 
Cuba, Hispaniola. 
Cupa: Ciénaga de Zapata, 
Ekman 16947. Los Coyuelos, 
Roig 3231. Hanabana, Wright 
3879 in part. 
JAMAICA: Black River, Hitch- 
cock 9650. , 
Haiti: Etang de l’Abovane, 
Ekman H 375. Solon, Ekman 
H 826. Aux Cayes, Hkman H 758. 
Dame-Marie, Ekman H 10450. 
5. Echinochloa _ crus-pavonis 
(H. B. K.) Schult., Mant. 2: 
269. 1824. 
; Oplismenus crus-pavonis 
FIGURE 300.—Echinochloa walteri, X 1 (Chase 1426. H.B. Kee Nov. Gen. et Sp. Le kOSs 
1815. Venezuela. 
Panicum sabulicola Nees, Agost. Bras. 258. 1829. Brazil. 
Pamcum crus-pavonis Nees, Agrost. Bras. 259. 1829. 
Panicum aristatum Macfad., Bot. Misc. Hook. 2: 115. 1831. Not 
P. aristatum Retz., 1786. Jamaica. 
Oplismenus jamaicensis Kunth, Enum. Pl. 1: 147. 1833. Based 
on Panicum aristatum Macfad. 
Panicum jamaicense Steud., Nom. Bot. ed. 2. 2: 257. 1841. 
Echinochloa sabulicola Hitche., Contrib. U. S. Natl. Herb. 17: 257. 
1913. 
Echinochloa crusgalli var. crus-pavonis Hitche., Contrib. U. S. Natl. 
Herb. 222) 1485" 9205 
Annual; culms erect or sometimes decumbent at base, as much as 
1 m or even 1.5 m tall, glabrous; sheaths glabrous; ligule wanting, 
the ligular area sometimes slightly pubescent; blades 5 to 15 mm wide, 
