798 MINNESOTA BOTANICAL STUDIES. 



POLYPOGON Desv. PI. Atl. 1 : 66. 1798. 



Polypogon littoralis Sm. Comp. Fl. Brit. 13. 1816. 



This species was collected at 1200 feet elevation, at the Nuu- 

 anu Pali, six miles from the seashore. It is probably a waif at 

 this point as very little of it was found. Hillebrand records it, 

 but is not certain where it was collected. 



April 23 (2201). 



STENOTAPHRUM Trin. Fund. Agrost. 17?. 1820. 



Stenotaphrum secundatum (Walt.) Kuntze, Rev. Gen. PL 

 794. 1891. 



Ischaemum secundatum Walt. Fl. Car. 249. 1788. 

 Stenotaphrum americanum Schrank. Hort. Monac. pi. 98. 1819. 



Abundant on grassy slopes at the Nuuanu Pali, island of 

 Oahu. It is said to be a good forage plant. 

 May 24 (2359). 



SYNTHERISMA Walt. Fl. Car. 76. 1788. 

 Synlherisma helleri Nash, n. sp. (Plate XLIV.) 



Panicum filiforme Hillebr. Fl. Haw. Is. 495. 1888, not L. 1753. 

 Glabrous throughout, with the exception of the spikelets. 

 Culms 2.5 to 4 dm. tall, erect, or decumbent at the base, slen- 

 der, somewhat branched; nodes 5 or less, blackish brown: 

 sheaths striate, the lower ones short, longer than the short 

 internodes, the uppermost sheath elongated; ligule membran- 

 ous, about 1 mm. long, truncate; inflorescence long exserted, 

 the axis 1 cm. long or less; spikes 3 to 8, 4 to 9 cm. long, 

 slender, ascending, approximate at the summit of the culm 

 and often with a single one a short distance below; rachis flat, 

 .5 mm. wide, flexuous toward the apex, short hispid on the mar- 

 gins; spikelets elliptic, 1.5 mm. long, .7 mm. wide, acute, in 

 pairs, one very short- pediceled, the other with a pedicel equal- 

 ling or slightly shorter than itself, with frequently an addi- 

 tional pediceled spikelet present on the same side of the rachis 

 just above the pairs; first scale wanting; second and third 

 scales membranous, hardly as long as the spikelet, the former 

 a little shorter than the latter, both 7-nerved, the marginal 

 and first nerve on either side of the midnerve pubescent with 

 appressed hairs; fourth scale chartaceous, deep chestnut 

 brown, 1.5 mm. long, acute, enclosing a palet of equal length 

 and of similar texture and color. 



