1917] Wiegand,— A new Species of Eragrostis 95 
The lateral nerves of the flowering glumes are always inconspicuous, 
but there are occasional specimens of E. pilosa in which they are 
equally indistinct. As an additional character may be mentioned 
the smooth empty glumes, which in E. pilosa are usually, but not 
always, scabrous on the keel. The florets are also somewhat smaller. 
The two most constant differences, however, are the denser panicle, 
which resembles that of Agrostis alba or Panicum agrostoides, and 
especially the absence of the long pilose hairs on the auricles of the 
sheath. The plant is much more constant in its characters than is 
E. pilosa. It can be readily recognized by its general appearance. 
The following is a more detailed description than is given by Hackel : 
ERaAGROSTIS peregrina, sp.nov. (E. pilosa var. condensata Hackel, 
Allgem. Bot. Zeitschr. vii. 13 (1901), non Æ. condensata Steud.) Annua; 
culmis pluribus ascendentibus vel erectis glabris basi aliquid genicu- 
latis; foliis 2-6 em. longis raro longioribus 1-2.5 mm. latis glabris, 
ligula e pilis tenuioribus 0.5 mm. longis vel brevioribus formata, vaginis 
aliter summo nudis; panicula subdensa 5-12 cm. longa 2.5—4 cm. 
diametro oblonga, ramis plerumque solitariis, longioribus 1—4 plerum- 
que 2-3 cm. longis angulo 45° patentibus densius spiculiferis fere ad 
basim; axillis glabris; . spiculis 6-10-floris 3-5 mm. longis 1-2 mm. 
latis in pedicellis brevissimis 0.5-2.5 mm. longis, glumis vacuis parvis 
lanceolato-ovatis acutissimis hyalinis inaequalibus, superiore glumis 
florentibus duplo breviore, carina non scabra; gluma florente (lem- 
mate) aliquanto divaricata ovata acuta 1.4 mm. longa tenui et mem- 
branacea infra viride supra castaneo-rubra ad apicem palidiore, carina 
apicem versus scabra, nervis lateralibus indistinctis, caryopsibus 
3-6 mm. longis ovali-oblongis sucino-fuscis. 
Annual; culms several, somewhat geniculate at the base, ascending 
or erect, glabrous: leaves 2.6 cm. long, rarely longer, 1-2.5 mm. wide, 
glabrous; ligule of fine hairs, 0.5 mm. long or less; sheaths otherwise 
naked at the summit; panicle rather dense, 5-12 cm. long, 2.5—4 cm. 
broad, oblong; branches mostly solitary, the longer 1—4 (mostly 
2-3) cm. long, spreading at an angle of 45°, rather densely spikelet- 
bearing to near the base; the axils glabrous: spikelets 6-10-flowered 
3-5 mm. long, 1-2 mm. wide, on very short pedicels 0.5-2.5 mm. long; 
empty glumes small, lance-ovate, very acute, hyaline, unequal, the ` 
upper about one half the length of the flowering glume; keel not 
scabrous; flowering glume (lemma) somewhat spreading, ovate, acute, 
1.4 mm. long, thin and membraneous, greenish below, chestnut-red 
above, the tip paler; keel scabrous toward the apex; lateral nerves 
indistinct; caryopsis 0.5-0.6 mm. long, oval-oblong, amber-brown. 
Specimens examined: GERMANY: “Auf Gartenland im Gross- 
herzoglichen Hofgarten, Karlsruhe, seit langen Jahren äusserst 
lästiges und schwer zu beseitigendes Umkraut: sandiger humus. 
