186 GRAMINEAE. 
62. REDFIELDIA Vasey, Bull. Torr. Club, 14: 133. 1887. 
A tall perennial grass, with long narrow leaves and an ample panicle. Spikelets 1-3- 
flowered, the flowers all perfect. Empty scales 2, about equal, shorter than the spikelet, 
I-nerved; flowering scales membranous, 3-nerved, with a ring of hairs at the base. Palet 2- 
nerved, shorter than the scale. Stamens 3. Styles long, distinct. Stigmas short, plumose. 
Grain oblong, free. [In honor of John H. Redfield, 1815-1895, American naturalist. 
A monotypic genus of the western United States. 
1. Redfieldia flexudsa (Thurb. ) Vasey. 
Redfieldia. (Fig. 425.) 
Graphephorum (2?) flexuosum Thurb. Proc. Acad- 
Phila. 1863: 78. 1863 
Redfieldia flexuosa Vasey, Bull. Torr, Club, 14: 
133. 1887. 
Culms 1%4°-4° tall, erect from a long horizon- 
tal rootstock, simple, smooth and glabrous. 
Sheaths smooth, the lower short and overlap- 
ping, often crowded, the upper much longer; 
ligule a ring of short hairs; leaves 1°-2° long, 
1//-2/ wide, involute; panicle ample and diffuse, 
8’-22’ in length, the branches finally widely 
spreading, flexuous, the lower 3/—8’ long; spike- 
lets about 3/’ long, 1-3-flowered, the empty 
scales acute, glabrous; flowering scales with a 
ring of hairs at the base, minutely scabrous, 
twice the length of the empty ones, acute, the 
middle nerve usually excurrent as a short point. 
On prairies, Nebraska and Wyoming to Colorado. 
and the Indian Territory. Aug.—Sept. 
63. DIPLACHNE Beauv. Agrost. 80. Al. 76. f. 9. 1812. 
Tufted grasses, with narrow flat leaves and long slender spikes arranged in an open pan- 
icle, or rarely only one terminal spike. Spikelets several-flowered, narrow, sessile or 
shortly pedicelled, erect. Two lower scales empty, membranous, keeled, acute, unequal; 
flowering scales I-3-nerved, 2-toothed and mucronate or short-awned between the teeth. 
Palet hyaline, 2-nerved. Stamens 3. Styles distinct. Stigmas plumose. Grain free, loosely 
enclosed in the scale and palet. [Greek, referring to the 2-toothed flowering scales. ] 
About 15 species, natives of the warmer regions of both hemispheres. Besides the following 
species, about 6 others occur in the southern and western parts of North America. 
1. Diplachne fascicularis (am.) Beauy. Salt-meadow Diplachne. 
(Fig. 426.) 
Festuca fascicularis am. Tabl. Encycl. 1: 189. 
1791. 
Diplachne fascicularis Beauv. Agrost. 160. 1812. 
Culms 1°-214° tall, erect, ascending, orroot- 
ing at the lower nodes, simple or branched, 
smooth and glabrous. Sheaths shorter than 
the internodes, loose, smooth or rough, the 
upper one longer and enclosing the base of 
the panicle; ligule 1’’-2’’ long; leaves 3/—12/ 
long, 1/’-3/’ wide, slightly scabrous; panicle 
4/-12’ in length, often exceeded by the upper 
leaf, the branches erect or ascending, the 
lower 2/—5’ long; spikelets 5-10-flowered, 
3/’-5’’ long, short-pedicelled, erect; lower 
scales glabrous, rough on the keel; flow- 
ering scales scabrous, ciliate on the margins 
toward the base, 3-nerved. 
In brackish marshes, Rhode Island to Florida 
and Texas. Also from Missouri and Nebraska 
to Mexico, and in the West Indies. Aug.—Oct. 
