HITCHCOCK AND CHASE—TROPICAL NORTH AMERICAN PANICUM, 509 
72. Panicum haenkeanum Presl. 
Panicum haenkeanum Presl, Rel. Haenk. 1: 304. 1830. ‘‘Hab. in Mexico.’’ The 
type specimen is in the herbarium of the National Museum at Prague. The only 
datum on the label is the word ‘‘Mexico.”’ 
Panicum. costaricense Hack. Oesterr. Bot. Zeitschr. 51: 428. 1901; Contr. U.S. Nat. 
Herb. 15: 134. 1910. 
For discussion of Panicum expansum Fourn., mentioned in the Revision under P. 
costaricense, see page 525 under P. cordovense. 
Field study of this species shows that it is a perennial with straggling culms as 
much as 2 meters long, often rooting at the lower nodes. 
DISTRIBUTION. 
Moist wooded or grassy banks and slopes, Mexico to Panama. 
Costa Rica: Térraba, Tonduz 3628, 
3636, 3673. Boruca, Ptttier 
4626. Cordoncillal, Pittier 
3640. Buenos Aires, Tonduz 
3687, 4860, Prttier 3661. 
Panama: Culebra, Hitchcock 9168. 
Between Corozal and Ancon, 
Pittier 2169, 2636. San Felix, 
Pittier 5247. Between Panama 
and Corozal, Hitchcock 9206. Fic. 97.—Distribution of P. haenkeanum. 
73. Panicum ineptum sp. nov. 
DESCRIPTION. 
Plants perennial (?); culms slender, apparently ascending, probably 50 cm. or 
more long, slender, striate-fluted, glabrous or the upper internodes sparsely pilose, 
producing nearly simple branches as much as 25 
cm. long; nodes retrorsely pubescent; sheaths loose, 
shorter than the internodes, pilose, the margins 
densely ciliate; ligule ciliate, about 0.5 mm. long; 
blades spreading, flat, 3 to 7 cm. long, 3 to 6 mm. 
wide, tapering from the truncate base to an acumi- 
nate apex, softly pilose on both surfaces; panicles 
: A ) Vz terminal, those of the branches short-exserted, 3 to 
” ian 5 cm. long, consisting of few to several short spread- 
Fre. 98.—P ono From type ing densely flowered branches, remote along the 
7 : slender pilose axis, the branches 4 to 6 mm. 
long, bearing 1 to 8 subsessile spikelets, the rachis pilose; spikelets 2.5 to 2.7 mm, 
long, 1.1 mm. wide, blunt; first glume about half as long as the spikelet, 3-nerved, 
obtuse, pubescent; second glume and 
sterile lemma equal, inflated, much 
larger than the fruit, the glume gibbous 
in the middle, 7-nerved, pubescent, 
the sterile lemma 3-nerved, glabrous, 
inclosing a membranaceous palea; 
fruit 1.6 mm. long, 0.9 mm. wide, 
elliptical, smooth and shining, the 
lemma strongly convex. 
Type in the herbarium of Krug & 
Urban in the Berlin Botanical Mu- 
seum, the ticket reading ‘‘817 Panicum-——S. Domingo, Bertero. Hb. Spr.’’ Acslipin 
Sprengel’s hand bearsthe name “‘Panicum nemorosum Sw.”’ [Ichnanthus nemorosus]. 
Fic. 99.—Distribution of P. inepitum. 
