HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 97 



Chase 3953; Key Largo, Chase 3935, Curtiss in 1884; Upper Metacumbe Key, 

 Chase 3915; Santa Rosa Island, Tracy 6508; without locality. Chapman, Rugel 

 444. 

 Louisiana: Battledore Island, Tracy & Lloyd A.M. 

 Kr^ Bahamas: Great Bahama, Britton & Millspaugh 2739; New Providence, Britton 

 Y^ & Brace 307, 493 (all in Field Mus. Herb.)- 



Tenera. — Perennials; culms slightly compressed, wiry, the internodes much elon- 

 gated; ligules membranaceous, about 0.5 mm. long; blades linear, at the base 

 narrower than their sheaths; panicles small, narrow, nearly simple; spikelets 

 short-pediceled, glabrous or nearly so; palea of sterile floret a small nerveless 

 scale; fruit elliptic, smooth and shining. 



Panicles 3 to 8 cm. long; spikelets 2.2 to 2.8 mm. long, pointed 48. P. tenerum. 



Panicles not over 2 cm. long; spikelets not over 1.6 mm. long, blunt. 49. P. stenodes. 



^ 48. Panicum tenerum Beyr. 



Panicum tenerum Beyr. in Trin. Mem. Acad. St. Petersb. VI. Sci. Nat. 1 : 341. 

 1834. The citation given is "Georg. Amer. (in paludibus nemorum cresc.) Beyrich 

 ms." The label accompanying the type specimen in the Trinius Herbarium reads 

 "Panicum tenerum n. sp. Georgia, in paludibus nemorum," 

 and "mis. Beyrich 1834" added in Trinius's writing. A 

 second ticket bears the name "Pan. tenerum Beyr." 



Panicum anceps strictum Chapm. Fl. South. U. S. 573. 

 1860. "Damp sterile soil, Florida." In the Chapman- 

 Herbarium at Biltmore is a specimen labeled "P. anceps 

 strictum from the original locality Apa[lachicola] 1887 " 

 and in the Chapman Herbarium in that of Columbia Uni- 

 versity is a similar specimen labeled "Panicum anceps L. 

 Fig. 89 -p. tenerum. From ^^j,_ gt^ictum, Southern Flora. Florida," with nothing to 

 type specimen. ... " 



indicate whether or not it was collected before the date of 



publication. In the National Herbarium are two more specimens from Chapman 

 also without date. All the specimens belong to P. tenerum, hence there is no doubt 

 as to the identity of Chapman's variety, though whether or not the type be in exist- 

 ence can not be determined. 



This species was described under the name of P. stenodes Griseb. by Vasey, a Chap- 

 man, & Scribner, c and Nash.'^ 



DESCRIPTION. 



Plants in small tufts from a knotted crown, 40 to 90 cm. high, olivaceous; culms erect, 

 stiff and wiry, producing small, solitary panicles from the upper nodes or remaining 

 simple, glabrous; sheaths much shorter than the internodes, the upper glabrous, the 

 lower sparsely to copiously papillose-pubescent toward the summit with soft, spreading 

 or reflexed hairs; blades 4 to 15 cm. long, 2 to 4 mm. wide, (the uppermost much 

 reduced), erect, firm, drying involute at least toward the summit, pilose on the upper 

 surface toward the base, or the lower sometimes on both surfaces; terminal panicles 

 rather short-exserted, 3 to 8 cm. long, rarely over 5 mm. wide, the short, appressed, 

 subracemose branches bearing rather crowded spikelets throughout their length, the 



aU. S. Dept. Agr. Div. Bot. Bull. 8: 25. 1889. 



b Fl. South. U. S. ed. 3. 583. 1897. 



cU. S. Dept. Agr. Div. Agrost. Bull. 7 : 64./. 46. 1897; op. cit. (ed. 2) 52./. 46. 1900. 



<« Small, Fl. Southeast. U. S. 92. 1903. 



41616°— VOL 15—10 7 



