11 
Eragrostis ciliaris Link. Found in rers bunches here and there on the steep 
rocky hillsides. October, 1894 
| Eragrostis plumosa Link. Pet i in iivit shady spots in gardens and on river 
bottoms. October, 1894 (40 
Eragrostis reptans Nees. Growtie? in patches along the edge of alkaline spots sur- 
rounding a lagoon. March, 1895 (596). This is the form known as Poa hyp- 
i noides Lam. 
| Eragrostis amcena Pres]. The specimens collected were found in a low wet place. 
The grass is not common. December, 1894 (286). Pringle's 3334, collection of 
1890, from Guadalajara is the same. gd specimens were referred to 
S Eragrostis vahlii Nees, (see Scribn. Proc. Acad. Nat. Sci. Phila. 1891, p. 304), 
Eragrostis amena being cited as a synonym. 3 vahlii Nees is a taller, 
more branched paniculate form of South America, and is possibly specifically 
distinet from the Mexican grass here referred to. 
Jouvea straminea Fourn., not Scribn. In large masses at the edge of a low damp 
place in a garden near the river bank. Plant 3 es E runners. Avoided 
38. h 
and what appears to be the male * vise a are 0 in iiie Eur pd This grass is 
very distinct, as shown by the female plants, from Jouvea straminea Seribu. 
(Bull. Torr. Bot. Club, 17: 221), Rachidospermum mexicanum Vasey (Bot. Gaz., 15, 
110). The plants are much more slender throughout, the leaves less rigid, the 
so-called spikes longer and much more slender, and the supposed spikelets free 
from the rachis in their upper half, as described by Fournier. These female 
spikes are eng crowded, the internodes being much longer than in Jowvea 
straminea Ser here isa little uncertainty as to the staminate plants of 
1 the irue ane ¿omita Dr. Palmer assures me, however, that the 47 speci- 
mens in hand were collected in the same locality as the female plants. These 
aliado plants are more slender, with longer and less rigid leaves than those 
which are undoubtedly the male plants of Jouvea tg There is little differ- 
ence, however, to be noted in the spikelets o 
Jouvea trum (Presl.) Seribn. (Bull. Torr. Bot. fai da: 143.) Found on re deep 
sands of the seashore in dense patches of greater or less extent. Too hard to be 
t by animals. December, 1891 (235). This grass is the ba of 
Vasey ; Jouvea straminea Scribn., not Fourn.; Uniola pungens Rupr. in Bull. Acad. 
oyal. Peo vol. 9 (excluding t the synonym); Brizopyrum pilosum Presl, Rel., 
Haenk., 1, 280. Presl's and Ruprecht's species were founded upon male planta: 
This species is represented in ‘National Herbartuni as follows: Liebmann 480 
(Santa Cruz), 4 ; E. Palmer 124 (La Paz, 1890), 4 9; Xantus 121 (Cape San 
Lucas), 4 ; Brandegee 42 (San Jose del Cabo, 1890), 4 9 ; Palmer 1384 (Manza- - 
nillo), 1890, ; Liebmann 479 (St. Augustine, 1842), 4 
A IIL SOME MEXICAN GRASSES COLLECTED BY E. W. NELSON IN 
| 1894-95. € ONEST ÓN 
í m TRON Coe? Mamas, I 
d By F. LAMSON-SCRIBNER and JARED G. SMITH. 
The grasses here enumerated form a part of a general collection made 
E. in southern Mexico by Mr. Nelson under the direction of the Division 
8 of Biological Survey of this Department. 
| Sacch y Benth. (Eriochrysis cay ). Vicinity of Choapam, 8 
Oaxaca; altitude, 3,800 to 4,500 feet. July 28, 1894; 886. Table-land about S 
Oeuilapa, Chiapas; altitude, 3,400 to 3,800 feet. August 21, 1895; 3041, 3063. 
Culms 2 Eto 3 fpèt t high. w 
Elion iliaris Hack. a roadside between San Ricardo and 
cmd Chiapas; altitude, 9 to 103,800 feet. MS » 1895; 2990. e 
