498 PROCEEDINGS OF THE AMERICAN ACADEMY. 
formes, glabrae, superiores breves, circa 2 cm. longae, patente 
papilloso-pilosae, abrupte ad folii junctionem contractae. Ligula 
membranacea, brevissima, 0.25 mm. longa. Folia erecta, rigidiuscula 
linearia, subtus plana apicem versus involuto-setacea, 5-14 cm. longa, 
1-2 mm. lata, lamina utrinque papilloso-pilosa. Paniculae terminales, 
solitariae vel per occasionem cum secunda breviori ex axe eodem pro- 
ducta, breve exsertae vel ad basin inclusae, plerumque bractea parva 
setiforme suffultae, circa 1 em. longae, 2-4 mm. diametro, 5-7-spicu- 
latae, axe pedicelloque scabris. Spiculae obtusae, turgidae, paullum 
ad basin attenuatae, 2 mm. longae, circa 1.5 mm. latae, valde nervatae; 
gluma prima quam spicula duplo brevior, 3-nervata, acuta; gluma 
secunda 9-nervata, lemma sterile 9-nervatum aequans; fructus ellip- 
soidalis, acutus, circa 1.7 mm. longus, 1 mm. latus, paullum glumam 
secundam et lemma sterile superans.— Type (in the Gray Herb.) and 
only specimen seen, low pine ridge, Yeacos Lagoon, March 5, 1907, 
M. E. Peck, no. 681. This species belongs to the small section Tenera 
as characterized in Hitche. & Chase, Contr. U. S. Nat. Herb. 15: 97 
(1910). Itis very similar to P. stenodes Griseb. and P. caricoides Nees, 
but differs from the former in having pilose culms, sheath and leaves: 
and larger spikelets; from the latter it differs very noticeably in the 
absence of long stiff hairs on the pedicel. 
PANICUM TRICHANTHUM Nees, Agrost. Bras. 210 (1829).— Open 
ground, Toledo, March 27, 1907, M: E. Peck, no. 775. The Peck 
specimen is rather stouter and the spikelets slightly larger than usual. 
PANICUM TRICHOIDES Sw. Prodr. Veg. Ind. Occ. 24 (1788).— Clear- 
ing near Manatee Lagoon, January 27, 1906, M. E. Peck, no. 314; 
open ground, Toledo, February 2, 1907, M. E. Peck, no. 637. 
Panicum virGatum L. Sp. Pl. ed. 1, 1: 59 (1753).— Swamp near 
Manatee Lagoon, July 18, 1905, M. E. Peck, no. 73; swamp near 
Manatee Lagoon, August 13, 1905, M. E. Pecl, no. 123. 
Panicum (§ PrycHopHYLLUM) CRUS-ARDEAE Willd. ex Nees, Agrost. 
Bras. 253 (1829).— Forest, upper Moho R., October 18, 1906, M. E. 
Peck, no. 565. The proper position of the section Ptychophyllum seems: 
to be very uncertain. By some it is considered a section of Setarva 
while by others it is retained in Panicum. As this species has nevet 
been transferred to Setaria, I am maintaining the old name though 
presumably its affinity is more with Setaria than Panicum. 
ICHNANTHUS PALLENS (Sw.) Doell in Mart. Fl. Bras. 2°: 290 ( 1877). 
— Forest near Manatee Lagoon, October 18, 1905, M. E. Peck, no- 
172; forest near Manatee Lagoon, January 27, 1906, M. E. Peck, no- 
312. | 
