HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 215 
Panicum huachucae Ashe, Journ. Elisha Mitchell Soc. 15: 51. 1898. ‘‘ Based on: 
Lemmon: P. dichotomum var. nitidum, subvar. barbulatum; Huachuca Mountains, 
Arizona, 1882.’’ Such a specimen could not be found in Ashe’s herbarium, but in 
the National Herbarium is a specimen so labeled which agrees with the description 
and which is doubtless the type, since Mr. Ashe visited the National Herbarium in 
the summer of 1898 and took notes on species of Panicum. This specimen consists 
of several slender culms beginning to branch and with overmature panicles. 
Panicum lanuginosum huachucae Hitche. Rhodora 8: 208. 1906. Based on Panicum 
huachucae Ashe. 
This species has been referred by some recent American authors@ to Panicum 
unciphyllum 'Trin.® 
DESCRIPTION. 
Vernal form cespitose, usually stiffly upright, light olivaceous, often purplish, 
harsh to the touch from the copious, spreading, papillose pubescence of culms and 
leaves; culms 20 to 60 cm. high; nodes bearded with spreading hairs; sheaths shorter 
than the internodes; ligules 3 to 4 mm. long; blades firm, stiffly erect or ascending, 
4 to 8 em. long, 6 to8 mm. wide, the veins inconspicuous, the upper surface copiously 
short-pilose, especially toward the base, the lower 
surface densely pubescent; panicle rather short- 
exserted until maturity, 4 to 6 cm. long, nearly as 
wide, rather densely flowered, the axis and often 
the branches pilose, the flexuous, fascicled 
branches ascending or spreading, short spikelet- 
bearing branchlets at base of the fascicles; spike- 
lets 1.6 to 1.8 mm. long, 1 mm. wide, obovate, 
obtuse, turgid, pafpillose-pubescent; first glume 
about one-third the length of the spikelet; second glume and sterile lemma subequal, 
scarcely covering the fruit at maturity; fruit 1.5 to 1.6 mm. long, 1 mm. wide, elliptic, 
obscurely apiculate. 
Autumnal form stiffly erect or ascending, the culms and sheaths sometimes papillose 
only, the branches fascicled, the reduced, crowded leaves ascending, the blades 2 to 
3 cm. long, much exceeding the reduced panicles. 
This species is variable as to amount of pubescence and as to the stiffness of the 
leaves, and it intergrades with the following subspecies. A specimen collected by 
Havard at El Paso, Texas, is referred here, though it is an unusual form with wider 
blades and spreading habit suggesting P. lindheimeri. 
Fig. 221.—P.huachucae. From type speci- 
men in National Herbarium. 
DISTRIBUTION. 
Prairies and open ground, Maine to South Dakota and south to North Carolina and 
southern California. 
Marne: North Berwick, Parlin 1186, 1189. 
Vermont: Burlington, Hitchcock 133. 
Massacuusetts: Wellesley, Smith 737. 
Connecticut: Southington, Andrews 70; New London, Graves 4. 
New Yor«: Vaughns, Burnham in 1897; Pavilion, Hill 182 in 1907; Westfield, 
Fill 171 in 1907; Jamaica, Bicknell in 1905; Hempstead, Bicknell in 1903; 
Woodmere, Bicknell in 1907. 
Ontario: Galt, Herriot 14; Niagara, Macoun 26337; Belleville, Macoun 29369; 
Long Point, Herriot 44. 
New Jersey: Netcong, Mackenzie 2075. 
@§$cribner and Merrill, Rhodora 3: 121. 1901; Nash in Britton, Man. 1040. 1901. 
b See synonymy under P. tenue Muhl., page 259. 
