HITCHCOCK—-MEXICAN GRASSES. 818 
HERBARIUM SPECIMENS FROM Mexico—Continued. 
Micuoacdn: Urudpan, along road, Hitchcock 6969. Morelia, Arséne in 1909. 
México: Popo Park, open woods, Hitchcock 6015. Toluca, rocky hill, EMtchcock 
6890, 6901. Amecameca, fields, Purpus 1645. Tlalnepantla, wet meadow, 
Rose, Painter & Rose 8385. Federal District, alkali flat, Hitchcock 5880; 
pasture, Hitchcock 5895; banks of ditches, Bourgeau 1029; Schumann 1754. 
Puesta: Atlixco, Nelson in 1893. Tehuacdn, edge of field, Hitchcock 6085. 
San Marcos, erect clumps, sandy soil, Hitchcock 6543. Puebla, Nicolas in 1909. 
Veracruz: Orizaba, roadside ditch, Hitchcock 6319, 6340, 6345; Nelson 42. Cér- 
doba, weed along track, Hitchcock 6401. Jalapa, along railway, Hitchcock 
6597; along stream, Hitchcock 6655; Smith 1753, 1816. 
Moretos: Cuernavaca, pasture, Hitchcock 6827. 
Oaxaca: Cuicatlin, Nelson 1650. Along ditch between Tule and Oaxaca, 
Hitchcock 6171. Valley of Oaxaca, Conzatti & Gonzdlez 340. Reyes, Nelson 
1709. Oaxaca, along road, Hitchcock 6162. 
Cutapas: Ocuilapa, table-lands, Nelson 3034. Roadside between Tuxtla and 
San Cristébal, Nelson 3115. 
18. Sporobolus jacquemontii Kunth, Rév. Gram, 2: 427. pl. 127. 1831. 
Type locality, ‘‘in insula St. Domingo,” the type specimen collected by Jacque- 
mont. 
Rance: West Indies, Mexico, and Central America. 
HERBARIUM SPECIMENS FROM MEXICO: 
Veracruz: Veracruz, sandy prairie, Hitchcock 6552. 
Micuoacan: Morelia, Arsene in 1908. 
19. Sporobolus purpurascens (Swartz) Hamilt. Prodr. Pl. Ind. Occ. 5, 1825. 
Agrostis purpurascens Swartz, Prodr. Veg. Ind. Occ. 25. 1788. 
Type locality, “‘Jamaica.” 
Ranae: Gulf region of the United States and Mexico, and in the West Indies. 
HERBARIUM SPECIMENS FROM MEXICO: 
Veracruz: Cérdoba, grassy bank, Hitchcock 6443. Orizaba, Botteri 693. Mira- 
dor, Liebmann 691 in 1841. Dos Puentes, Liebmann 692. Jalapa, Smith 
1569. 
20. Sporobolus erectus sp. nov. 
Perennial, glabrous throughout, culms cespitose, erect, 60 to 70 cm. high, subcom- 
pressed; sheaths somewhat keeled; ligule a ciliate-erose ring 0.5 mm. long, sometimes 
a few long hairs at the sides; blades flat or becoming involute, somewhat soft and 
thick, sparsely papillose-hispid with long hairs on the margins, the main culm blades 
as much as 4 mm. wide and 15 cm. long, the uppermost narrow and involute, 2 to 4 
cm. long, those of the innovations slender and involute; panicle narrow, dark brown, 
10 to 15 cm. long, 3 to 4 cm. wide, the branches in verticils, slender, ascending, naked 
below, the lower 2 to 3 cm. long; spikelets glabrous, short-pediceled and appressed 
along the upper half of the branches, 3 mm. long, the pedicels mostly less than 1 mm. 
long; glumes unequal, acute, the first 1.5 mm. long, the second as long as the spikelet; 
lemma and palea equal, the latter at maturity split down the middle by the enlarged 
caryopsis, each part acute, about 1 mm. wide; grain elliptic, abruptly pointed at 
each end, 2 mm. long, 1 mm. wide. 
Type in the U.S. National Herbarium, no. 691231, collected in a clay cut, 1,400 
meters altitude, at Jalapa, Mexico, September 2, 1910, by A.S. Hitchcock (no. 6616). 
Ranae: Known only from the type collection. 
21. Sporobolus virginicus (L.) Kunth, Rév. Gram. 1: 67. 1829. 
Agrostis virginica L. Sp. Pl. 63. 1753. 
Sporobolus pungens (Schreb.) Kunth, Rév. Gram. 1: 68. 1829. 
Type locality given as ‘‘ Virginia.”’ 
