HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 211 
type could not be found in Ashe’s herbarium, nor any specimens so named by him. 
The description seems to apply to the autumnal form of P. meridionale, though the 
culms and sheaths described as ‘‘glabrous or pubescent,” seems to indicate that some 
material of P. tenue or other species of the Ensifolia was mixed with it. 
Panicum unciphyllum meridionale Scribn. & Merr. Rhodora 3: 123. 1901. Based 
on P. meridionale Ashe. 
DESCRIPTION. 
Vernal form tufted; culms 15 to 40 cm. high, pilose below, the upper portion and 
the axis of the panicle appressed-pubescent, or the latter often nearly glabrous; lower 
sheaths pilose, upper minutely appressed-pubescent; ligules 3 to 4 mm. long; blades 
155 to 4 cm. long, 2 to 4 mm. wide, long-pilose on the upper surface, the hairs erect, 
less dense than in P. implicatum,; panicles 1.5 to 4 cm. long, nearly or quite as wide, 
ovate or rhombic, the branches ascending; spikelets 1.3 to 1.4 mm. long, 0.8 mm. wide, 
obovate, obtuse, minutely papillose-pubescent; first glume one-fourth to one-third the 
length of the spikelet, acute or subacute; second glume and sterile lemma equal, as 
long as the fruit at maturity; fruit 1.2 mm. long, 0.8 mm. 
wide; broadly elliptic, obscurely pointed. 
Autumnal form erect or nearly so, with fascicled 
branchlets from all the nodes; leaves and panicles not 
greatly reduced, the latter included late in the season; 
winter leaves lanceolate, long-pilose toward the base, the 
rosette formed rather late. 
This species resembles P. implicatum in the vernal form 
but is more slender and less pilose. The axis of the 
panicle in P. implicatum is pilose, while in P. meridionale it is typically glabrous or 
somewhat puberulent but not pilose. 
A late autumnal specimen, Chase 1472, Irondale, Chicago, Ill., is referred here, 
doubtiully, because of the scanty pubescence, but the presence of papille suggests 
that the hairs have been worn off; the spikelets are 1.4 mm. long. 
Exceptional specimens pilose in the panicle closely approach slender specimens of 
P. implicatum. This form is represented by Wheeler 24 and 28. 
Fic. 215.—P. meridionale. From 
type specimen. 
DISTRIBUTION. 
Sandy or sterile woods and clearings, Rhode Island to Wisconsin and south to 
Alabama. 
Connecticut: Waterford, Graves 171, 172; South Glastonbury, Wilson 1258. 
Ruope Isuanp: Kingston, Collins 
in 1908. 
New York: Lawrence, Bicknell in 
1902 and 1906; Valley Stream, 
Bicknell in 1905; Hempstead, 
Bicknell in 1908; Hewlett, 
Bicknell in 1906; Woodmere, 
Bicknell in 1902. 
New Jersey: Oradell, Mackenzie 
2477; Atsion, Chase 35344; 
South Amboy, Mackenzie 2710. 
PENNSYLVANIA: Refton, Heller 
4790. | 
Inprana: Lake County, Bebb 2815, 2936, 2947; Dune Park, Hill 98 in 1905, 
Umbach 1087, 1800. 
Iuuino1s: Chicago, Hill 145 in 1906. 
Fig. 216.—Distribution of P. meridionale. 
