no 



GRAMINEAE. 



i. Amphicarpon Amphicarpon (Pursh) 

 Nash. Amphicarpon. (Fig. 238.) 



Milium amphicarpon Pursh, Fl. Am. Sept. 1:62. pi. 2. 



1814. 



Milium ciliatum Muhl. Gram. 77. 1817. 

 Amphicarpum Purshii Kunth, Rev. Gram. 28. 1829-35. 

 Amphicarpon Amphicarpon Nash, Mem. Torr. Club, 



5: 352. 1894. 



Culms erect, iS'-iS' tall, slender, glabrous. 

 Sheaths papillose-hirsute; ligule pilose; leaves i'-6' 

 long, 2 // -6 // wide, erect, acuminate, hirsute and 

 ciliate ; panicle linear, 4 '-6' long, branches 3-4, erect, 

 bearing few spikelets ; spikelets about 2 X/ long, ellip- 

 tic ; outer scales 5-nerved, membranous, glabrous ; 

 subterranean spikelets ovoid in fruit, about 3 // long, 

 acute, the scales all becoming much indurated. 



In moist pine barrens, New Jersey to Florida near the 

 coast. Aug. -Sept. 



10. ERIOCHLOA H.B.K. Nov. Gen. i: 94. 1815. 



[HELOPUS Trin. Fund. Agrost. 103. 1820.] 



Perennial grasses with flat leaves, and short-pedicelled spikelets borne in secund spikes. 

 which form a terminal panicle. Spikelets with an annular callus at the base and articulated 

 to the pedicel. Scales 3, the two outer membranous, acute, the inner, one shorter, indurated 

 and subtending a palet and a perfect flower. Stamens 3. Styles distinct. Stigmas plumose, 

 Grain free. [Greek, signifying wool-grass.] 

 Species about 5, in tropical and temperate countries. 



i. Eriochloa punctata (I,. ) W. Hamilt. 

 Dotted Millet. (Fig. 239.) 



Milium punctatum L,. Amoen. Acad. 5: 392. 1759. 

 Eriochloa polystachya H.B.K. Nov. Gen. i: 95. pi. jr. 



1815- 

 Eriochloa pnnctata W. Hamilt. Prodr. PI. Ind. Occ. 5. 



1825. 



Culms erect or ascending, i-3 tall, glabrous. 

 Sheaths glabrous or sometimes pubescent; ligule a 

 fringe of short white hairs ; leaves 2 / -io / long, 2"- 

 3" wide, acuminate, glabrous or pubescent ; spikes 

 4-25, i '-2' long, sessile or nearly so ; rachis pubes- 

 cent ; spikelets about 2" long, ovate-lanceolate, 

 acuminate ; outer scales pubescent with appressed 

 silky hairs, the first a little exceeding the second, 

 the third about \" long, rounded at the apex and 

 bearing a pubescent awn about y z /f long. 



Kansas to Texas and Mexico. Widely distributed 

 in tropical America. 



ii. SYNTHERISMA Walt. Fl. Car. 76. 1788. 

 [DIGITARIA Scop. Fl. Carn. Ed. 2, i: 52. 1772. Not Heist. 1763.] 

 Annual grasses with flat leaves, and spikelets borne in pairs or sometimes in 3's, in 

 secund spikes which are digitate or approximate at the summit of the culm. Spikes often 

 urplish. Scales of the spikelet 4, sometimes 3 by the suppression of the lowest one ; the 

 :h or innermost scale chartaceous, subtending a palet of similar texture and a perfect 

 flower. Stamens 3. Stigmas plumose. [Greek, crop-making, in allusion to its abundance.] 



AlMitit 2" *IH-. -ii-s, wich-ly <listributi-d in temperate and tropical regions. 

 Rachin flat, broadly winjfi-d; spiki-s narrowly linear. 



I* -i ' long; second scale about one-half as long; first minute, rarely wanting. 



Spik.-U-ts alH.ut i" long; second scale about as long; first scale wanting, rarely present!*' 

 Rachis .vanglcd, not winged; spikes filiform. 



