HITCHCOCK AND CHASE—-NORTH AMERICAN PANICUM. 195 
¥Y 68. Panicum virgultorum Hack. > PP Arendt eres 
Panicum virgultorum Hack. Oesterr. Bot. Zeitschr. 51: 369.1901. ‘‘Costarica: ine 
virgultis ad La Verbena prope Alajuelito leg. Tonduz (Pittier et Dur. Pl. costar. exs. 
nr. 8829) et ad rivulos prope tres Rios (Pittier ibid. nr. 4326).’’ The type, Tonduz 
8829, is in Hackel’s herbarium. 
Tonduz®@ listed this species under the name ‘‘ Panicum oblongum Hack.’’ This 
was a herbarium name at first applied by Hackel to Tonduz’s no. 8829, as shown by 
specimens in Hackel’s herbarium and others distributed by Tonduz. 
DESCRIPTION. 
Plants perennial, ascending from a decumbent or sometimes a widely creeping 
base, branching and rooting at the lower, geniculate nodes; culms slender, wiry, 0.4 
to 1 meter or more long, compressed, glabrous or pubes- 
cent below the nodes; nodes pubescent or glabrous; 
sheaths often as long as the internodes, usually short- 
ciliate, otherwise glabrous or the lowermost pubescent; 
ligules membranaceous; blades 5 to 10 cm. long, 5 to 10 
mm. wide, narrowly lanceolate, acuminate, narrowed to 
the base, scabrous on the upper surface, smooth and 
glossy beneath; panicles mostly long-exserted, 2.5 to 7 
cm. long, half to two-thirds as wide, the 2 to 4 branches 
ascending, compactly flowered except at the base, or the lower sometimes naked 
- one-third its length, the short branchlets and pedicels pubescent; spikelets 1.6 mm. 
long, 0.9 mm. wide; first glume less than one-fourth the length of the spikelet; second 
glume and sterile lemma equal, 5-nerved; fruit 1.5 mm. long, 0.8 mm. wide, oval, 
smooth and shining but with sparse, long, appressed, silky hairs. 
Fig. 118.—P. virgultorum. From 
type specimen. 
DISTRIBUTION. 
Hedgerows and cultivated fields, Guatemala and Costa Rica. 
GUATEMALA: Dept. Huehuetenango, Seler 2708. 
Costa Rica: Alajuelita, Tonduz 8818, 8829. 
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9. Panicum schmitzii Hack. 
Panicum schmitzw Hack. Ann. Naturhist. Hofm. Wien 17: 254.1902. Nospecimen 
nor locality is cited. The author states that the specimen was from Mexico and was 
sent him by Dr. Zahibruckner for identification, having been communicated to the 
Hofmuseum by Schmitz, but that neither the name of 
the collector nor the date of collection was given. The 
type is in Hackel’s herbarium. 
DESCRIPTION. 
Plants apparently perennial ascending, or erect from a 
long-jointed, creeping base, rooting and branching from 
TiGn tiger) schmici. From ae nodes of the decumbent portion, the suberect branches 
type specimen. 20 to 45 cm. high, simple or nearly so; culms puberulent 
at least below the puberulent nodes; sheaths short, puberu- 
lent, at least toward the summit; ligules ciliate; blades 6 to 10 cm. long, 10 to 18 
mm. wide, lanceolate, more or less falcate, narrowed to the rounded base, sparsely 
papillose-hispid on the upper surface, glabrous or with a few scattered papille or 
hairs beneath; pene rather short- seaerieth 4 to 8 em. long, the few subracemose 
a Bull Heb. SBoiee 3: “450, 1895. 
