THE HOP TREFOILS. 205 
able that this excellent species was confused by Linneus 
with his T. agrarium; but it is very certain that it is not his 
type. This will more clearly appear under the bibliography 
of the next species. 
2. C. AGRARIA. Trifolium agrarium, Dod. Pempt. 566 
(1583); Linn. Sp. 772 (1753), as to name and figures cited, 
not of Schreb. in Sturm (1804). T. campestre, Schreb. l. c. 
Chrysaspis campestris, Desv. Fl. Anjou, 338 (1827). Amarenus 
agrarius, C. Presl. Symb. i. 46 (1830). Melilotus lupulina, 
Lam. Fl Fr. ii. 593 (1778), excl. var. Linnsus does not 
appear to have known this plant except by the descriptions 
and figures of earlier authors. His account of the calyx in- 
dicates that he mistook C. aurea for the same as T. agrarium 
of Dodoens. His diagnosis, short and imperfect as it is, de- 
termines nothing; but the positive identification of T. agra- 
rium—a name not proposed by him, but only adopted from 
Dodoens and others—is made by reference to the figures by 
Dodoens and by Vaillant which he cites. These figures re- 
move all doubt that the plant of the broad and short dentate 
leaflets, the terminal one very distinetly petiolulate, ete., ete., 
is the one which must bear the specific name agraria. Pol- 
lich, Savi, Presl—all eminent specialists in the study of these 
plants, and men thoroughly competent in bibliographical 
questions—found this conclusion unavoidable. 
3. C. sPADICEA. Trifolium spadiceum, Linn. Fl. Suec. 2 
ed. 261 (1755); Sturm, l.c. Amarenus spadiceus, Presl, : g 
(1830). Species with the habit of C. aurea, but differing 
most obviously by its spikes of dark-brown rather than yel- 
low flowers. Its leaflets are broader, those of the lower part 
of the stem quite obovate, the others obovate-oblong, all 
. notably dentate, and all three are distinctly but equally 
Short-petiolulate. The calyx-teeth in this are quite perma- 
nently villous-hairy. The banner is here less striate and 
also less notably inflexed than in most other species. Dur 
neus gave recognition to this species in 1753, but inadver- 
