577 Nash : The dichotomous Panicums 



Massachusetts : Martha's Vineyard, Miss Witinan, July, 1890 ; 

 Ipswich, Geo. V. iVcrs/i, Aug. 25, 1898, no. J2. 



New York : Fisher's Island, C. B. Graves, Aug. 29, 1898, 

 no. 12. 



New Jersey : Wildwood, May 30 and 31,1 897, E. P. Bick- 

 ne//; Tom's River, July 25-31, 1898, IV. N. Clute, no. 175 (type); 

 Tuckerton to Atsion, July 3-6, 1899, W. N. Clntc. 



Related to P. Addisonii, but at once distinguished by its smaller 

 and relatively broader spikelets. 



Panicum pseudopubescens 



A densely tufted pubescent perennial. Culms usually rather 

 stout at the base, 2-4 dm. tall, hirsute with ascending hairs, finally 

 branched, the nodes barbed : leaves usually 3 ; sheaths less than 

 one half as long as the internodes, densely hirsute with spreading 

 hairs 1.5-2 mm. long ; ligule a dense ring of hairs about 0.5 mm. 

 long ; blades erect, rather firm, lanceolate, serrulate and very rough 

 on the margins, 4-10 cm. long, 3-1 1 mm. wide, densely hispid on 

 the lower surface with spreading hairs, the upper surface with a 

 ring of long stout erect hairs just back of the ligule and usually 

 also more or less hirsute with spreading hairs : panicle consider- 

 ably exserted, broadly ovate, 5-9 cm. long, its axis glabrous or 

 with a few scattered hairs below, the branches with the axils spar- 

 ingly hirsute, ascending or spreading, the larger ones 2.5-5 cm, 

 long: spikelets 2.25-2.5 mm. long and i — 1.2 mm. wide, obovate, 

 a little pointed, the first scale usually about one third as long as 

 tfie spikelet, i -nerved, glabrous or sparingly pubescent, broadly 

 ovate or nearly orbicular, acute or obtuse, the second and third 

 scales densely pubescent with spreading hairs about 0.25 mm. long, 

 commonly 9-nerved, the second a little shorter than the third, the 

 fourth scale nearly white, a little less than 2 mm. long and about 

 I mm. wide, oval. 



Type collected at Auburn, Lee Co., Alabama, May 7, 1898, by 

 Messrs. F. S. Earle and C. F. Baker, no. 1537. Nos. 1522, 1524, 

 1526 and 1529, of this same collection, are also referred here. It 

 is distinguished from any form of P. piibeseens by its much larger 

 spikelets, and from P. Atlauticum by the shorter pubescence and 

 stouter culms 



Panicum pubifolium 



/'. latifolium var. niolle Vasey, Contr. U. S. Nat. Herb. 3: 33. 

 1892. Not Z'. ;;/^//^ Sw. 1788. 



