268 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Fig. 295.— P. curtifolium 

 From type specimen. 



the summit; ligules about 1 mm. long, the hairs soft, rather sparse; blades spread- 

 ing or reflexed, 1.5 to 3 cm. long, 2 to 5 mm. wide, thin and soft, sparsely pilose on 

 both surfaces or glabrous above except for long soft hairs near the base; panicles 

 short-exserted at least till after maturity, 2 to 3 cm. long, 

 nearly as wide, the branches ascending; spikelets 1.4 mm. 

 long, 0.7 mm. wide, elliptic-obovate, obtuse, glabrous, or 

 minutely pubescent; first glume about one-fifth as long as 

 the spikelet; second glume and sterile lemma both shorter 

 than the fruit at maturity; fruit 1.25 mm. long, 0.7 mm. 

 wide, elliptic. 



Autumnal form weakly spreading, the culms branching 

 from the middle nodes after the maturity of the primary 

 panicles, the branches exceeding the internodes; ultimate branchlets in small fasci- 

 cles toward the summit of the branches, the reduced blades spreading and the small 

 panicles mostly exserted ; winter rosette 

 appearing early, the soft blades mostly 

 2 to 3 cm., but sometimes as much as 5 

 cm. long. 



This species is the only one of this 

 group with spreading pilose pubescence 

 and manifest ligules. 



DISTRIBUTION. 



Boggy soil and shady, moist places, 

 sometimes forming a rather dense car- 

 pet, South Carolina and Tennessee to 

 Florida and Mississippi. 



Fig. 296. — Distribution of P. curtifolium,. 



South Carolina: Aiken, Ravenel; Hartsville, CoJcer in 1909. 



Florida: Pensacola, Combs 525; Eustis, Holm 24, Nash 1507; Myers, Hitchcock 



867; without locality, Chapman. 

 Tennessee: Lookout Mountain, Biltmore Herb. 10715b (Biltmore Herb.). 

 Alabama: Sand Mountain, Biltmore Herb, in 1899; Auburn, Earle & Baker 1532, 



Hitchcock 1337, Tracy 3748 in part, 3752; Flomaton, Hitchcock 1058; Tuskegee, 



Carver 27, 41; Gateswood, Tracy 8421. 

 Mississippi: Ocean Springs, Tracy 4598, 4599; Mississippi City, Hitchcock 1094. 



160. Panicum chamaelonche Trin. 



Panicum chamaelonche Trin. Gram. Pan. 242. 1826. Trinius states concerning the 

 origin of his specimen, "V. spp. Am. bor. (Trattinick, ex. coll. Enslini). " The type, 

 in the Trinius Herbarium, is the early branching form. 



Panicum nitidum minor[us] Vasey, Contr. Nat. Herb. 3 : 30. 1892. "Florida. " The 

 type, in the National Herbarium, was collected by William C. Canby at St. Augustine, 

 Florida, April, 1869, and is labeled " nitidum var. minor" in Dr. Vasey 's writing. 

 This consists of several small tufts of vernal culms. 



Panicum baldwinii Nutt. ; Kearney, U. S. Dept. Agr. Div. Agrost. Bull. 1: 21. 

 1895. The citation is as follows: "Panicum baldwinii Nutt. in Herb. Phila. Acad. 

 (Panicum nitidum minor Vasey Contr. U. S. Nat. Herb. 3: No. 1, 30, 1892.)" No 

 description is given. Since Nuttall's herbarium name is taken up, this name should 

 be considered a nomen nudum, and not based on the synonym cited. 



Panicum baldwinii Nutt.; Chapm. Fl. South. U. S. ed. 3. 586. 1897. Based on 

 "Panicum baldwinii Nutt. (in Herb.)" and described. The type, in the Nuttall 

 Herbarium, labeled "Panicum Baldwinii, Florida, Bald." is a tuft of vernal culms 

 beginning to branch, with mature and over-mature panicles. 



