54 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
narrow, long-acuminate, glabrous, 3-nerved, the florets successively 
smaller, the summits of all about equal; palea much shorter than 
the lemma. Perennial reeds, with broad, flat linear blades and large 
terminal panicles. 
1. Phragmites communis Trin., Fund. Agrost. 134. 1820. 
COMMON REED. 
Arundo phragmites L., Sp. Pl. 81. 1753. Europe. 
Arundo occidentalis Sieber; Schult., Mant. 2: 289. 1824. Marti- 
nique, Sieber 31. 
Phragmites martinicensis Trin.; Steud., Nom. Bot. ed. 2, 2: 324. 
1841. Martinique, Sieber 31. 
Phragmites phragmites Karst., Deutsch. Fl. 379. 1880. 
Culms erect, 2 to 4 m tall, with stout creeping rhizomes and often 
also with stolons; blades flat, 1 to 5 em wide; panicle tawny, 15 to 40 
cm long, the branches ascending, rather densely flowered; spikelets 
1 to 15 mm long, the florets exceeded by the hairs of the rachilla 
(ikea, PAS) 
Swamps throughout the temperate regions of the world, extending 
into the Tropics. Called sometimes ‘‘wild cane.”’ 
Bauamas: New Providence, Brace 3901. Watlings Island, Geogr. 
Soc. Baltimore 521. 
JAMAICA: Ferry River, Mazon 2187; Harris 11576. Black River, 
Hitchcock 9648. Cockpit River, Ridley 95. 
a Port-au-Prince, Ekman H 5935. Roche 4 Bateau, Ekman 
298. 
Dominican ReErusuic: Santo Domingo, Rose 3798; Ekman H 
11167. Cabral, Abbott 1998. Arroyo Leonor, Valeur 513. Without 
locality, Faris 98; Wright, Parry, and Brummel 619. 
Puerto Rico: MHerrera, Hggers 1195. Humacao, Eggers 712. 
Guanica, Heller 6289. 
LEEWARD IsLANDs: Guadeloupe, Duss 4035. 
WINDWARD IsLtANnps: Martinique, Duss 1283. St. Lucia, Box 189. 
Topsaco: Aitchcock 10231. 
20. TRIODIA RK. Be; Prodr: FlNov. Holly ais25 5 130 
Spikelets several-flowered; glumes nearly equal in length; lemmas 
broad, rounded on the back, the apex from minutely emarginate or 
toothed to deeply and obtusely lobed, 3-nerved, the lateral nerves 
near the margins, the midnerve excurrent between the lobes as a 
minute point or as a short awn, the lateral nerves often excurrent as 
minute points, usually all the nerves pubescent below. Erect tufted 
perennials, rarely rhizomatous or stoloniferous, the blades usually 
flat, the inflorescence an open or contracted panicle. 
1. Triodia eragrostoides Vasey and Scribn., Contrib. U. S. Natl. 
Herb. 1: 58. 1890. Texas. 
Culms slender, 50 to 100 cm tall; panicle open, 10 to 30 cm long; 
spikelets on slender pedicels, 1 to 10 mm long, oblong, mostly 6- to 
10-flowered, scarcely 5 mm long; lemmas about 2 mm long, obtuse, 
