HITCHCOCK—MEXICAN GRASSES. 3 209 
HERBARIUM SPECIMENS FROM MeExico—Continued. 
Jattsco: Rfo Blanco, Palmer 591 in 1886. Guadalajara, in shade near base of 
Barranca de Oblatos, Hitchcock 7367. Tequila, dry slopes of barranca, 
Pringle 4612. 
Cotma: Alzada, among bushes on rocky hill, Hitchcock 7109. 
14. CYMBOPOGON Spreng. Pl. Pugill. 2: 14. 1815. 
KEY TO THE SPECIES. 
Awn 2.5 em. long.......... 2202220 e eee eee ee eee ee ee eee eee eee 1. C. bracteatus. 
Awn 5 to 7.5 em, long..........22...0. 02-2 eee ee eee eee ee eee eee 2. C. ruprechtit. 
1. Cymbopogon bracteatus (Willd.). 
Andropogon bracteatus Willd. Sp. Pl. 4: 914. 1806. 
Type locality, “‘Cumana,”’ Venezuela. 
RanGE: Mexico to Brazil. 
HERBARIUM SPECIMENS FROM MExIco: 
Veracruz: Mirador, Liebmann 46, Ross 630. Zacuapan, Purpus 1996. 
Curapas: Yajalén, Nelson 3399. 
2. Cymbopogon ruprechtii (Hack.). 
Andropogon ruprechtit Hack. in DC. Monogr. Phan. 6: 645. 1889. 
Type locality, Zacuapan, Veracruz, the type specimen collected by Galeotti 
(no. 5697). The first description is by Hackel (loc. cit.), but the Galeotti specimen 
was mentioned earlier by Ruprecht in his list of Galeotti’s plants (Bull. Acad. Sci. 
Brux. 9: 245. 1842). This specimen among others was cited by Hackel and is the 
type as it suggested the specific name. 
RanGE: Mexico to Central America. 
HERBARIUM SPECIMENS FROM MEXICco: 
Jauisco: Guadalajara, side of Barranca de Oblatos, Hitchcock 7339. Rfo Blanco, 
Palmer 513 in 1886. Sierra Madre west of Bolafios, Rose 2956. 
Couma: Alzada, prairie, Hitchcock 7066. 
Micuoackn: El Ocote, rocky hill, Langlassé 530. 
Curapas: Roadside between San Ricardo and Ocozocuautla, Nelson 2991. 
15. HOLCUS L. Sp. Pl. 1047. 1753. 
SorcHuM. 
KEY TO THE SPECIES. 
Spikelets and pedicels densely clothed with golden brown hairs; 
panicle branches capillary........----------+-----+--++-+-- 2. H. trichocladus. 
Spikelets and pedicels sparsely clothed with pale hairs; panicle 
branches not capillary........----..-----------+--e eee eee 1. H. halepensis. 
1. Holeus halepensis L. Sp. Pl. 1047. 1753. JOHNSON GRASS. 
Andropogon halepensis Brot. Fl. Lusit. 1: 89. 1804. 
Type locality given as ‘‘in Syria, Mauritania.”’ 
Rance: Widely distributed in the warmer parts of both hemispheres. 
HERBARIUM SPECIMENS FROM MEXICO: 
Sonora: Hermosillo, weed in field, Hitchcock 3614. Guaymas, Palmer 64 in 1887, 
687 in 1890. Magdalena, Rose, Standley d& Russell 15096. Alamos, Rose, 
Standley & Russell 13027. 
Srnatoa: Culiacén, Palmer 1559 in 1891. Rosario, Lamb 478. 
Duranco: Durango, weed in field, Hitchcock 7562, 7660. 
Coanutta: Saltillo, weed in field, Hitchcock 5649. 
Nuevo Leon: Monterey, sandy field, Hitchcock 5553. 
