10 
constant nibbling of domestic animals. The staminate and 5 plants are 
sometimes separated in large patches, or they may grow closely intermingled. 
is grass is used in the publie squares with good effect, as the ees watering 
keeps it fresh and green, and but little cutting is necessary. 
u EEEn UT MÀ OP mate. 
e generic characters for Opizia given by Presl 
(Reliq. Haenk., 1: 293) are very imperfect, and are - 
CS Ta drawn apparently from the female plant, which 
l a 
xy ç e 7 alone he figures (Pl. 41, f. 1). Fournier revised the 
e characters of this grass (Bull. Soc. Roy. 
d Bot. Belg., XV, drid es uq to understand the Y 
e of th f ts, overlooking the 
iera mexica 
.3.—Fou Dia 
ta ki h nd 
ganot 9 temak aikai is. minute first pes and thus mistaking the seco 
lume for the first, the flowering glume for the 
second, and the palea for the flowering glume. Bentham, who had never seen 
Opizia, drew up the characters for the “ Genera Plantarum" from those published 
by Fournier, and they were reproduced by Hackel without change. Baillon 
(Hist. de Plant., nds Graminées, 271) first correctly describes. the female 
spikelets and caryopal The figures here presented were drawn from Dr. 
Palmer’s specimens, dod. are deaigued to show the true structure of the female 
spikelets, including the minute first glume, 
which is searcely longer than the hairs at 
the base and which has so long been over- 
looked. It may be said that the length of the 
awns varies a good deal, as do the lobes or 
The female spikelets are disposed in short, 
ine spikes, — ie st: pato ol 
closely resembling those of Bulbilis ( Bucklor). 
The rachilla supporting the triaristate rudi- 
mentary floret in the pistillate spikelets is 
adnate to sec m for nearly its entire 
length. (Fig.4. 
Gouinea rata d esl) Seribner. In tufts 
among the underbrush onhilisides. Novem- 
ber, 1894 (77). 
There are 3 species of Gouinea, 2 Mexican 
and 1 South American. The latter is repre- 
sented in the National Herbarium by No. 928 
Morong, plants of South America, distributed 
as Triodia latifolia (Griseb.). The species 
ranches of the panicle 5 de —Opizia stolonifera: a, female 
above the middle, naked below, el nd 
G. pot ifolia. as glume; d, first empty glume; e, 
1. Branches of the panicle flower-bearing Mes 28 W 
base 9 floret (f); y, pistil; h, caryopsis. 
2. Awns 1 line long or less; culms stout, 4 to 7 feet. G. mexicana. 
2. Awns 4 to 6 lines long; culms slender, 1 to 3 feet G. virgata. : 
virgata Scribn., Bromus virgatus Presl in Reliq. Haenk., 263. G. a 
polygama Fourn. Wa ex. Pl. Enum., Gram. 103. Festuca fournieriana * 
Hemsl. 505 Liebmann, St. Augustins, Mex., also 1087 E. Palmer, from 
Manzanillo, distributed as Leptochloa (?) eme Vasey. 
G. mexicana Scribn. nom. nov. Leptochloa (3) mexicana Seribn. in 
isis Acad. Nat. Sci. Phila. 1891, p. 302. No. 3252 Pringle, 1890. 
latifolia Scribn. nom. nov. 3 eee e latifolia’ 
Gries; Plant. Lorenz., p. 259. No. 928 M 
