164 NORTH AMERICAN FLORA [VoLtumE 17 
52. AXONOPUS Beauv. Agrost. 12. 1812. 
Cabrera Lag. Gen. Sp. Pl. 5. 1816. 
Lappagopsts Steud. Syn. Gram. 112. 1854. . 
Tufted perennial grasses, with an inflorescence of stiff racemes approximate at the summit 
of the stem, the racemes 1-sided, the rachis flat, or with excavations for the reception of the 
spikelets, and with numerous golden hairs. Spikelets articulated to the pedicel below the 
scales, 1-flowered, solitary, alternate, in 2 rows on one side of the rdchis, the back of the fruiting 
scale turned away from the rachis. Scales 3 (first scale wanting); second and third scales 
about equal in length, glabrous or pubescent; fourth or fruiting scale indurated, oblong- 
elliptic, its margins a little inrolled, enclosing a palet of similar texture and a perfect flower. 
Stamens 3. Styles distinct. Stigmas plumose. 
Type species, Axonopus aureus Beauv. 
Spikelets not immersed, a tuft of numerous stiff golden hairs at the base. 1. A. aureus, 
Spikelets immersed in excavations in the rachis, without a basal tuft of hairs. 2. A. chrysoblepharis. 
1. Axonopus aureus Beattv. Agrost. 12. 1812. 
Paspalum aureum FH. B.K. Nov. Gen. & B: 1:93. 1815. 
Digitaria aurea Spreng. Syst. 1: 272. 1825. 
Paspalum exasperatum Nees, Agrost. ae 81. 1829. 
Panicum aureum Trin, Mém, Acad. St. Petersb. VI. 32: 196. 1834. 
Stems up to 1.5 m. tall, glabrous; Jeaf-sheaths glabrous or pubescent; blades up to 2 dm. 
long, 7-9 mm. wide, glabrous or pubescent; racemes 8-15, corymbose-fasciculate, 5-8 cm. 
long, the rachis triangular, the angles tuberculate-hispid with stiff golden spreading hairs, 
with a tuft of widely spreading similar hairs below each spikelet; spikelets 1.25-1.5 mm. long, 
obovate to elliptic, obtuse, glabrous. 
TYPE LOCALITY: Not indicated. 
DISTRIBUTION : Costa Rica and tropical South Amcrica. 
ILLUSTRATION : Trin. Ic. p/. 97. 
2. Axonopus chrysoblepharis (Lag.) Chase, Proc. Biol. Soc. 
Wash. 24: 134. 1911. 
Cabrera chrysoblepharis Lag. Gen. Sp. Pl. 5. 1816. 
Paspalum aureum H.B.K. Nov. Gen. & Sp. 1: 93, in part. 1815. 
Paspalum immersum Nees, Agrost. Bras. 82. 1829, 
Paspalum appendiculatum J. Pres], in Presl, Rel. Haenk. 1: 211. 1830. 
Panicum immersum Trin. Mém. Acad. St. Petersb. VI. 32: 197. 1834. 
Panicum chrysoblephare Steud. Syn. Gram. 38. 1854: 
Paspalum chrysoblephare Doell, in Mart. Fl. Bras. 22: 119. 1877. 
Stems up to 1 m. tall, glabrous; leaf-sheaths densely papillose-hispid; blades up to 2.5 
dm. long, 6-8 mm. wide, glabrous or pubescent, usually ciliate toward the base; racemes 3-9, 
corymbose-fasciculate, 3-8 cm. long, the rachis flat, with excavations for the reception of the 
spikelets, the margins and median elevation tuberculate-hispid with yellow hairs; spikelets 
1.25-1.5 mm. long, oblong-elliptic, obtuse, glabrous. 
TYPE LOCALITY: Panama. 
DISTRIBUTION : Costa Rica and Panama; also in tropical South America. 
ILLUSTRATION : H.B.K. Nov. Gen. & Sp. pé 27. 
53. REIMAROCHLOA Hitchc. Contr. U. S. Nat. 
Herb. 12: 198. 1909. 
Reimaria Fligge, Gram. Monog. 213, in part. 1810. 
Perennial grasses, usually diffusely branched, with the inflorescence composed of 2 or 
more secund racemes. Spikelets articulated to the pedicel below the scales, 1-flowered, 
acuminate, on short pedicels, alternately disposed in 2 rows on a narrow or somewhat dilated 
rachis, the back of the flowering scale turned toward the rachis. Scales 2 (first and second 
scales wanting); third scale membranous, 3~-9-nerved, acute or acuminate; fourth or fruiting 
scale long-acuminate, thin, becoming harder in fruit, the margins inrolled below and enclosing 
the palet, which is free at the apex and of similar taxture, anda perfect flower. Stamens 2. 
Styles distinct to the base. Stigmas long-plumose. 
