HITCHCOCK REVISIONS OF NORTH AMERICAN GRASSES. 



185 



Guanajuato: Irapuato, Hitchcock 7427. 



Queretaro: Queretaro, Arslne 10275, 10346; Basile 47, 48. 



Veracruz: Orizaba, Schaffner 36. 



Puebla: Tehuacan, Liebmann 361; Hitchcock 6095. Puebla, Nicolas 314 and in 



1909. San Marcos, Hitchcock 6512. Atlixco, Nelson in 1893. 

 Mexico: Rio Hondo, Pringle 7533; Holway 11, 3153. 

 Federal District: Pringle 6470, 9578, 9579; Orcutt 3697, 4342; Holway 3040, 3554; 



Hitchcock 5911, 5925, 7836; Bourgeau 441. 

 Michoacan: Punguato, Arsene in 1912. Morelia, Arslne in 1909. 

 Oaxaca: El Parian, Pringle 4937. Oaxaca, Hitchcock 6178, 6184; Smith 939; Con- 



zatti & Gonzdlez 344. 



12. Chaetochloa magna (Griseb.) Scribn. 



Setaria magna Griseb. Fl. Brit. W. Ind. 554. 1864. "Jamaica!, Pd. [Purdie], along 

 the lagoons behind the ferry." In the Grisebach Herbarium are some fragments 

 of the type, the original being probably 

 at Kew. 



Chamaeraphis magna Beal, Grasses N. 

 Amer. 2: 152. 1896. Based on Setaria 

 magna Griseb. 



Chaetochloa magna Scribn. U. S. Dept. 

 Agr. Div. Agrost. Bull. 4: 39. 1897. Based 

 on Setaria magna Griseb. 



Chaetochloa magna was included by 

 Elliott 1 under Panicum italicum. 



description. 



Plants annual, robust, erect, usually not 

 branched at base, sparingly branched above, 

 the branches erect; culms as much as 4 

 meters tall, rarely taller, and 2 cm. thick at 

 base, smooth, scabrous below the panicle; 

 sheaths smooth or scabrous at summit, 

 hispid-ciliate on the margins; ligule a 

 densely and stiffly hispid membrane, 1 to 2 

 mm. long; blades flat, scabrous, as much 

 as 0.5 meter long and 3.5 cm. wide, panicles 

 densely flowered, nodding, often interrupted 

 at base, tapering at each end, as much as 40 cm. long and 3 cm. thick, those of the 

 branches much smaller, the axis densely pubescent and also villous with ascending 

 hairs about 1 mm. long; branches as much as 1.5 cm. long, many-flowered; bristles 

 somewhat flexuous, 1 or 2 below each spikelet, 1 to 2 cm. long; spikelets about 2 

 mm. long, not very turgid on the convex side; first glume about one-third as long 

 as the spikelet, 3-nerved; second glume about as long as the spikelet, 5-nerved; 

 sterile lemma as long as the spikelet, 7-nerved, the sterile palea well developed; 

 fertile lemma smooth. 



Nash's no. 1279, from Eustis, Florida, is noted by the collector as being 8 to 20 

 feet tall. 



DISTRIBUTION. 



Marshes and wet places along the coast, Delaware to Florida and Texas; also in 

 the West I ndies^aad Panama. 



Delaware: Woodland Beach, Commons in 1892. Collins Beach, Commons in 1897 

 Maryland: Millstone, Hitchcock 7890; Tidestrom 5321. 



Fig. 47.- 



-Chaetochloa magna. 

 Florida. 



From Nash 1279, 



1 Bot. S. C. & Ga. 1:113. 1816. 



