 BB4 Naso: ENUMERATION OF THE 
1. CHAETOCHLOA puRPURASCENS (H.B.K.) S. & M. Bull. U.S. i] 
Dept. Agric. Div. Agrost. 21: 13. 1900. 
Setaria purpurascens H.B.K. Nov. Gen. & Sp.1: 110. 1815. 
In fields and waste places, frequent. Santurce, Heller 14 and 
329. 
2. CHAETOCHLOA IMBERBIS (Poir.) Scribn. Bull. U. S. Dept. Agric. 
Div. Agrost. 4: 39. 1897. 
Panicum imberbe Poir. in Lam. Encycl. Suppl. 4: 272. 1816. 
Sintenis 208 (fide Scribn. & Merr. |. c.); Adjuntas road, near 
Ponce, Heller 6240. 
CHAETOCHLOA IMBERBIS GENICULATA (Lam.) S. & M. Bull. U.S. 
Dept. Agric. Div. Agrost. 21: 12. 1900. 
‘3 
Panicum geniculatum Lam. Encycl. 4: 727. 1797. 
Differs from the species in having stouter geniculate stems, 
broader leaf-blades, and a longer inflorescence. 
Humacao, Blauner 233. 
3. CHAETOCHLOA SCANDENs (Schrad.) S. & M. Bull. U. S. Dept. 
Agric. Div. Agrost. 21: 17. 1900. 
Setaria scandens Schrad., Schult. Mant. 2: 279. 1824. 
Sintenis 6498 (fide Scribn. & Merr. 1. c.). 
2h CRNCHRUS LE. Sp. PI 1046: 1753 
Involucres 4-6-flowered, armed at the base with erect barbed bristles. 
1. C. echinatus. 
Involucres 2~flowered, armed at the base with generally shorter reflexed spines. 
2. C. tribuloides. 
1. CENCHRUs ECHINATUS L. Sp. Pl. 1050. 1753. 
In sandy waste places, common. Santurce, Heller 3 and 
1346 ; Cayey, Underwood and Griggs 406. 
2. CENCHRUS TRIBULOIDES L. Sp. Pl. 1050. 1753. 
Fajardo, Blauner 242. 
22. STENOTAPHRUM Trin. Fund. Agrost. 175. 1820 
I. STENOTAPHRUM SECUNDATUM (Walt.) Kuntze, Rev. Gen. 794: 
1891. . : 
Ischaemum secundatum Walt. Fl. Car. 249. 1788. 
Roadside near Bayamon, Heller 1241 ; in sand, Manati to Vega 
Baja, Underwood and Griggs 959. 
