76 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



21. PANICULARIA Fabr. 



Panicularia Fabr. Enum. PI. Hort. Helmst. ed. 2. 2: 373. 1763. 

 Glyceria R. Br. Prodr. Fl. Nov. Holl. 179. 1810. 



Spikelets few to many-flowered, terete or slightly flattened, in narrow or spreading 

 panicles; rachilla articulated above the glumes and between the florets, usually smooth ; 

 glumes unequal, shorter than the lemmas; lemmas smooth or scabrous, rounded on the 

 back, 5 to 9-nerved, the nerves mostly prominent. Usually tall, aquatic, perennial 

 grasses with flat leaves and terminal panicles. 



Spikelets 10 to 18 mm. long; panicles narrow - 1 ■ P '■ borealis. 



Spikelets 3 to 6 mm. long; panicles diffuse. 



Leaves broad and comparatively short; ligule 10 to 12 mm. 



long; spikelets crowded at the ends of the flexuous branches. 2. P. pauciflora. 

 Leaves elongated; ligule about 4 mm. long; spikelets not 

 crowded - 3. P. americana. 



1. Panicularia borealis Nash, Bull. Torrey Club 24: 348. 1897. 

 Glyceriafluitans angustata Vasey, Proc. Portland Soc. Nat. Hist. 2: 91. 1895, not G. 



angustata Fries, 1869. 



Glyceria borealis Batch. Proc. Manchester Inst. Arts Sci. 1: 74. 1900. 



A slender, glabrous perennial 40 to 150 cm. high, with flat leaves and narrow panicles 

 10 to 40 cm. long; spikelets 10 to 18 mm. long, 7 to 13-flowered, the lemmas hispidulous 

 on the nerves only. Related to Panicularia septentrional) s Hitchc. 



Margins of streams and ponds, southeastern Alaska, south and east to Washington, 

 New England, and New York. 



Specimen examined: Yes Bay, Behm Canal, by small lakes, Howell 1717. 



Panicularia borealis Nash is very near Panicularia plicata (Ft.) (Glyceria plicata 

 Fries) o being distinguished by its somewhat longer, more sharply nerved, and more 

 acute lemmas. 



2. Panicularia pauciflora (Presl) Kuntze, Rev. Gen. PI. 2: 783. 1891. 

 Glyceria pauciflora Presl, Rel, Haenk. 1: 257. 1830. 



Glyceria spectabilis flaccida Trim; A. Gray, Proc. Acad. Phila. 1862: 336. 1862. 

 A rather stout, glabrous perennial 60 to 120 cm. high, with broad leaves, long ligulee 

 and diffuse panicles 10 to 20 cm. long; leaf blades 10 to 30 cm. long, 1 to 2 cm. wide: 

 ligules 10 to 12 mm. long; spikelets 5 or 6-flowered, 3 to 5 mm. long, mostly crowded or 

 Bubfasciculate at the ends of the branches; glumes broadly obtuse, the first about 1.5 

 mm. long, the second 2 mm. long; the lemmas 2.5 to 3 mm. long, prominently 5-nerved , 

 scabrous on the back, with a broadly obtuse scarious and erose apex. 



In damp soils and in bogs, Cook Inlet, Yakutat Bay, and southeastern Alaska, south- 

 ward to Colorado and California. 



Specimens examined: Lawson Bay, Kellogg 183; Latouche, Piper 4660; Foggy Bay. 

 near Cape Fox, Coville & Kearney 2570; Kasilof, Evans 788; Sitka, Evans 203, Wright 

 1581, 1591, Piper 4658; Yakutat, Coville & Kearney 2981, Piper 4657; Juneau, Cole in 

 1899, Trelease & Saunders 2944, Coville <fc Kearney 2530; Yes Bay, Behm Canal, Howell 

 1717a. 

 3. Panicularia americana (Torr. ) MacM. Met. Minn. Val. 81. 1892. 



Poa aqualica americana Torr. Fl. North. & Mid. U. S. 1: 108. 1824. 



Glyceria grandis S. Wats, in A. Gray, Man. ed. 6. 667. 1890. 



A stout, coarse grass 90 to 150 cm. high, with rather broad flat leaves and ample, 

 spreading panicles 20 to 40 cm. long; sheaths loose; ligule 2 to 4 mm. long, truncate: 

 leaf blades 18 to 30 cm. long or more, 6 to 16 mm. wide, scabrous above, glabrous be- 



aMant. 3: 176. 1842. 



