52 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
1. Holeus halepensis L. Sp. Pl. 1047. 1753. JOHNSON GRASS, 
Andropogon halepensis Brot. Fl. Lusit 1: 89. 1804. 
Sorghum halepense Pers. Syn. Pl. 1: 101. 1805. 
Type Locaity: ‘‘Habitat in Syria, Mauritania.”’ 
RanG_E: Native of the Old World, widely introduced into North America, frequent 
as a weed in cultivated fields. 
New Mexico: Nara Visa; Mangas Springs; Hillsboro; Gila; Deming; Mesilla 
Valley; Pecos Valley. 
This is common in several parts of New Mexico, especially in the irrigated river 
valleys. So far it has not been introduced into the valley of the San Juan, but it is 
well established in those of the Rio Grande and Pecos. In some parts of the State it 
has been cultivated for hay. Unfortunately it isa very troublesome weed, and in the 
Rio Grande Valley has become a dangerous pest in alfalfa fields, taking possession of 
them and crowding out the less aggressive alfalfa. 
8. SORGHASTRUM Nash. INDIAN GRASS. 
Stout perennials with racemes arranged in open panicles; spikelets sessile at each 
joint of the slender rachis of the peduncled racemes, these reduced to 2 or 3 joints; 
sterile spikelets reduced to hairy pedicels; glumes indurated; sterile lemma hyaline, 
the fertile lemma reduced to hyaline appendages to the stout awn; palea obsolete. 
1. Sorghastrum nutans (L.) Nash in Small, Fl. Southeast. U. 8. 66. 1903. 
Andropogon nutans L. Sp. Pl. 1045. 1753. 
Andropogon avenaceus Michx. F1. Bor. Amer. 1: 58. 1803. 
Sorghum nutans A. Gray, Man. 617. 1848. 
Type Locauity: ‘‘Habitat in Virginia, Jamaica.”’ 
RanGeE: British America to Arizona and Florida. 
New Mexico: Tesuque; Las Vegas; Clayton; East View; Kingston; Rio Mimbres. 
Plains, in the Upper Sonoran Zone. 
9. HETEROPOGON Pers. 
Coarse perennial with narrow leaves, compressed sheaths, and terminal solitary 
dense racemes; spikelets 1-flowered, in pairs at the rachis nodes, one sessile and fertile, 
the other pedicellate and staminate or sterile; glumes firm, convolute, awnless; lemma 
small, hyaline, awned; palea small and hyaline, or wanting; stamens 3; styles distinct. 
1. Heteropogon contortus (L.) Roem. & Schult. Syst. Veg. 2: 836. 1817. 
‘Andropogon contortus L. Sp. Pl. 1045. 1753. 
Type Locauity: “Habitat in India.’ 
Ranae: Arizona and New Mexico to Tropical America; in tropical lands nearly 
around the world. 
New Mexico: Hillsboro; Tortugas Mountain; Organ Mountains. Dry hills, in the 
Lower and Upper Sonoran zones. 
10. NAZIA Adans. 
Diffusely branched annual with flat leaves and terminal spikelike inflorescence; 
spikelets in groups of 3 to several at each joint of the main axis, the uppermost in 
each fascicle sterile, 1-flowered; first glume minute or wanting; second glume rigid, 
exceeding the lemma, its back covered with hooked spines; lemma and palea hya- 
line; stamens 3; styles short and distinct; grain oblong, free. 
1. Nazia aliena (Spreng.) Scribn. U. 8. Dept. Agr. Div. Agrost. Bull. 17: 28. 1899. 
Lappago aliena Spreng. Neu. Entd. 3: 15. 1822. 
Tragus alienus Schult. Mant. 2: 205, 1824. 
Type Locauiry: ‘‘Hab. in Brasilia.” 
