HITCHCOCK- — REVISIONS OF NORTH AMERICAN GRASSES. 183 



each ultimate branchlet or pedicel bearing a bristle, the corresponding spikelet some- 

 times suppressed, the cluster bearing, therefore, usually not more than 8 spikelets and 

 8 bristles, the branchlet pubescent but not villous; bristle, flexuous, becoming impli- 

 cate, about 1 cm. long, scabrous, antrorsely below, retrorsely above; spikelets about 1.5 

 mm. long, often dark purple; first glume about half as long as the spikelet, 3-nerved; 

 second glume and sterile lemma about as long as the fertile lemma, 5-nerved, the sterile 

 palea wanting; fertile lemma transversely rugose with numerous fine ridges. 



On account of the retrorsely scabrous bristles, the panicles of this species readily 

 become attached to the clothing. 



DISTRIBUTION. 



Brushy hillsides, Guatemala to Brazil; also in Porto Rico. 

 Guatemala: Buena Vista, Eeyde & Lux 4295. 

 Honduras: San Pedro Sula, Thieme 842, 5582 B. 



Costa Rica: San Jose, Tonduz 3122. Canas Gordas, Pittier 7346,. 11006. 

 Panama: El Boquete, Hitchcock 8291. 

 Porto Rico: Utuado, Sintenis 6498. 

 Trinidad: Port of Spain, Amer. Gr. Nat. Herb. 610. 

 Venezuela: Tovar, Fendler 1644. 

 Brazil: Without locality, Glaziou 22614. 



11. Chaetochloa grisebachii (Fourn.) Scribn. 



Setaria grisebachii Fourn. Mex. PI. 2: 45. 1886. Founder cites as synonym, "S. 

 setosa Beauv. var. caudata Griseb. in sched." Grisebach's idea of S.setosa var. 

 caudata is based on a specimen collected in Antigua by Wullschlaegel (no. 629). 

 This name, published in the Flora of the British West Indian Islands, 1 is based 

 on Panicum caudatum Lam., but Fournier's conception of Grisebach's idea is evi- 

 dently based on two specimens in the Grisebach Herbarium which he considers 

 to be conspecific, the one, Wullschlaegel 629, collected in Antigua and labeled by 

 Grisebach with the varietal name and cited under the variety, the other Schaffner 36, 

 collected at Orizaba and labeled by Grisebach " Setaria setosa. 1 ' This second speci- 

 men, one of several cited by Fournier, is taken as the type of S. grisebachii. 



Setaria laevis Fourn. Mex. PL 2: 45. 1886. "Bernal (Karw. n. 961)." The type 

 collection has been examined at the herbarium of the Botanical Garden at Petrograd. 



Chaetochloa grisebachii Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 4: 39. 1897. 

 Based on Setaria grisebachii Fourn. 



Chaetochloa grisebachii ampla Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Bull. 

 21: 36. /. 21. 1900. The range is given as "New Mexico; Mexico." No type is 

 designated, but in the National Herbarium is the specimen from which the figure 

 was drawn. This is Pringle 6470, from Federal District, Mexico. It is marked 

 "Type" in Merrill's hand. 



Chaetochloa grisebachii mexicana Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Bull. 

 21: 37. 1900. "Setaria mexicana Schaffner in Herb." The two specimens citecL^ 

 are "San Luis Potosi, 1044 Schaffner, 1876; Schaffner, Sept., 1877." The type is in 

 the Gray Herbarium. A duplicate type has been examined in the herbarium of the 

 New York Botanical Garden. It bears two numbers, 193 and 1044. There are three 

 plants, all depauperate, with narrow few-flowered panicles mostly not exceeding 

 the leaves. One plant has two larger panicles. This form appears to differ only in 

 being depauperate. 



Setaria mexicana Schaffn.; Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Bull. 

 21: 37. 1900, as synonym. 



1 555. 1864. 



