8 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



1.5 to 3.5 cm. wide, cordate-clasping at base, acute or acuminate, rather thick 

 or firm, pubescent or glabrous beneath, scabrous above; panicles terminal and 

 axillary, similar to those of /. pollens but on the average larger, sometimes as 

 much as 20 cm. long; spikelets similar to those of /. pallens in arrangement and 

 structure, but usually larger; glumes often sparsely pilose; sterile lemma con- 

 taining a well-developed palea and a staminate flower; fertile lemma 2 mm. 

 long, with prominent scars at base. 



This species is closely related to /. pallens, from which it differs in the 

 thicker, proportionately broader blades and larger, often sparsely pilose spike- 

 lets. 



DISTRIBUTION. 



Moist, more or less shaded slopes in the uplands, Porto Rico and Guatemala 

 to Ecuador and Brazil. 



Guatemala : Cubilquitz, Tiirckhcim 7800. 



Costa Rica : " Chemin de Carrillo," Biolley 3112. 



Panama: Frijoles, Hitchcock 8398. San Felix, Pittier 5203. Juan Diaz, Killip 



4063. 

 Porto Rico: Adjuntas, Chase 6472; Sintenis 4610; Britton & Shafer 201S. 



Utuado, Britton & Cowell 1008. Mayaguez, Heller 4479. Cayey, Chase 



6735. Aybonito, Sintenis 2869. 

 Trinidad: Tabaquite, Hitchcock 10125; Amer. Or. Nat. Herb. 585. Maraval, 



Bot. Gard. Herb. 5425. Port of Spain, Hitchcock 10033. 

 Tobago : Hitchcock 10263. 



Venezuela : Santa Catalina, Rushy & Squires 353. 

 Brazil: Parana, Dusen 7911. 

 Ecuador: Balao, Eggers 14655. 



Explanation of Plate 5. — Ichnanthus axillaris. Specimen from Maraval, Trinidad, 

 Bot. Gard. Herb. 5425 (U. S. Nat. Herb. no. 975122). Natural size. 



6. Ichnanthus lanceolatus Scribn. & Smith. 



Panicum lindeni Fourn. Mex. PL 2: 29. 1886. Not P. lindeni Griseb. 1866. 

 The type specimen, collected in Yucatan by Linden, has been examined at the 

 Paris Herbarium. 



Ichnanthus lanceolatus Scribn. & Smith, U. S. Dept. Agr. Div. Agrost. Bull. 4: 

 36. pi. 5. 1897. " Old fields about Izamal. No. S54. George F. Gaumer, Septem- 

 ber, 1895." The type is in the United States National Herbarium. 



description . 



Culms erect or slightly spreading at base, 40 to 60 cm. high, striate, glabrous 

 or puberulent, the nodes about 4, glabrous, or puberulent below the sheath 

 at the margin of the latter ; sheaths shorter than the internodes, striate, glabrous 

 on the surface or the lowermost villous, the margin villous ; blades lanceolate 

 to ovate-lanceolate, or the lower ovate, 5 to 7 cm. long, 1 to 3 cm. wide, the 

 uppermost reduced, rather firm in texture, glabrous or slightly scaberulous 

 beneath, scabrous above, narrowed from a rounded or cordate base into a 

 petiole 1 to 10 mm. long; panicles terminal or also axillary, 5 to 12 cm. long, 

 the one from the uppermost sheath smaller, the few branches rather stiffly 

 spreading, as much as 6 cm. long, the axes scaberulous ; spikelets about 4 mm. 

 long, lanceolate, slightly compressed laterally, glabrous, the pedicels scabrous, 

 unequal, the shorter of the pair about 1 mm. long, the longer about 3 mm. 



