420 
The name Digitaria was originally applied by Heister (Adans. 
Fam. Pl. 2: 38. 1763),to the Zripsacum ot Linnaeus, and ante- 
dates by nine years the Digitaria of Scopoli (FI. Carn.'Ed. 2,1: §2. 
1772), who applied it to a group of plants that have since been 
considered by many as only a section of Panicum. This name 1s 
therefore a synonym of Zripsacum and not available. The oldest 
available name appears to be Syxtherisma of Walter. A partial 
sysonymy of the three species occurring in the north-eastern 
United States would be as follows: 
1. SYNTHERISMA SANGUINALIS (L.). 
Panicum sanguinale L. Sp. Pl. 57. 1753. 
Digitaria sanguinalis Scop. Fl. Carn. Ed. 2, 1: 52. 1772. 
Syntherisma praecox Walt. Fl. Car. 76. 1788. 
Paspalum sanguinale Lam. Tabl. Encycl. 1: 176. 1791. 
2. SYNTHERISMA LINEARIS (Krock.). 
Panicum lineare Krock. FI. Sil. 1: 95. 1787. 
Syntherisma serotina Walt. Fl. Car. 76, 1788. 
Digittana humifusa Pers. Syn. 1: 85. 1805. 
Syntherisma glabra Schrad. Fl. Germ. 1: 163. 1806. 
Panicum glabrum Gaud. Agrost. 1: 22. 1811. 
3. SYNTHERISMA FILIFORMIs (L.). 
Panicum filiforme L. Sp. Pl. 57. 1753. 
Paspalum filiforme Sw. Prodr. 22. 1788. 
Syntherisma villosa Walt. Fl. Car. 74. 1788. 
Digitaria filiformis Muh\. Gram. 131. 1817. 
Panicum PorTERIANUM nom. n. 
Panicum latifolium Walt. F\. Car. 73. 1788. Not Linneus, 
1753. 
Panicum Walteri Poir. in Lam. Encycl. Suppl. 4: 282. 1816. 
Not Pursh, 1814. 
Panicum latifolium var. molle Vasey, Bull. Bot. Div. U. 5. 
Dept. of Agric. 8: 33. 18809. 
Search has failed to disclose an available published name Aer 
this plant. The Linnaean name belongs to a tropical Specie®: 
The P. Walteri of Poiret is antedated by two years by Pursh's 
name which was applied to an entirely different plant, the F- Crus- 
galli vax. hispidum of Torrey. The varietal name of Vasey has 
