HITCHCOCK—MEXICAN GRASSES. 367 
HERBARIUM SPECIMENS: 
San Luis Potosi: Cardenas, railway cut, Hitchcock 5717; damp clay, along rail- 
way, Hitchcock 5777. 
Jauisco: Guadalajara, near water in ditch, road to Barranca de Oblatos, Hitch- 
cock 7321; wet soil, Pringle 2311, 11740; Palmer 240 in 1886. 
Couma: Alzada, along railway, Hitchcock 7061. 
Micnoacdn: Morelia, Arséne in 1909. 
Puesia: Tehuacan, along railway, Hitchcock 6058. 
VERACRUZ: Veracruz, sandy prairie, Hitchcock 6557. 
110. MELICA L. Sp. Pl. 66. 1753. 
KEY TO THE SPECIES, 
Fertile florets 1 or 2 in each spikelet; spikelets 4 to 6 mm. long. 
Primary branches of panicle ascending....................... 1. M. imperfecta. 
Primary branches of panicle more or less reflexed............. la. M. imperfecta 
flexuosa, 
Fertile florets 3 or 4 in each spikelet. 
Plants tall and rather stout, somewhat woody; second glume 
10 to 12 mm. long..............--22--.2-20-.--20--2-000- 4. M. frutescens. 
Plants herbaceous, slender; second glume 8 mm, long. 
Panicle nearly simple, with 1 or 2 short appressed branches. 2. M. porteri. 
Panicle compound, the branches spreading or reflexed... 3. M. alba. 
1. Melica imperfecta Trin. Mém. Acad. St. Pétersb. VI. Sci. Nat. 21: 59. 1836. 
Type locality, California. 
RanGE: Pacific slope from San Francisco Bay through Lower California, 
HERBARIUM SPECIMENS FROM MExIco: 
Lower Cauirornia: Cedros Island, Palmer 660 and 662 in 1889. San Quentin 
Bay, Palmer 685 and 727 in 1889. Todos Santos Island, Anthony 203. 
la. Melica imperfecta flexuosa Boland. Proc. Calif. Acad. 4: 101. 1870. 
Type locality, ‘‘on rocks on the road from Mariposa to Clark’s,’’ Yosemite National 
Park, California. 
RanGE: Pacific slope, Yosemite region to Lower California. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower Catirornia: El Rancho Viejo, Brandegee 14 in 1889. Nachognero Valley, 
Schoenfeldt 3438. San Antonio Valley, Brandegee 120. Without locality, 
Orcutt in 1886. 
2. Melica porteri Scribn. Proc. Acad. Phila. 1885: 44. pl. 1. f. 17, 18. 1886. 
Melica mutica parviflora Porter in Port. & Coult. Syn. Fl. Colo. 149. 1874. 
Melica parviflora Scribn. Mem. Torrey Club 5: 50. 1894. 
Type locality, Colorado. 
Rance: Rocky Mountain region from Colorado to Chihuahua, occasional on bluffs 
in Missouri and Texas. 
HERBARIUM SPECIMEN FROM MEXICO: 
Cuinuanua: Sierra Madre, Pringle 2045. 
3. Melica alba sp. nov. ' 
Perennial; culms cespitose, slender, erect, glabrous, 0.5 to 1 meter high; sheaths 
minutely roughened; ligule thin, white, membranaceous, soon lacerate, 5 to 10 mm. 
long; blades flat, minutely scabrous, 10 to 20 cm. long, 2 to 3 mm. wide, the lower 
shorter, or reduced to sheaths; panicle narrow, 10 to 15 cm. long, the branches rather 
81544°—13——13 
