EE VISION OF KUMEX. 91 



recognized from its large ovate leaves not at all constricted 

 above the base, and its large strongly toothed valves, much 

 longer than the callosity. 



* * Valves very prominently toothed. 



17. K. PULCHER, L. A couple of feet high; stem 

 rather slender but firm, zigzag above, branching at nearly 

 every node or at length dichotomous above, mostly glabrous ; 

 leaves not over 5x12 cm., minutely crenulate crisped, 

 fiddle shaped, cordate, obtuse to acute, the petiole and one 

 or both surfaces of the principal veins mostly very papil- 

 late or subvillous; flowering branches simple, divaricate, 

 all but their lowest leaves very small; whorls dense but 

 remote ; pedicels very stout, scarcely larger than the fruit, 

 tumidly jointed in the middle ; valves rigid, one commonly 

 larger than the others, heavily veined, 3 to 4x5 mm., ovate, 

 obtuse, with 5 to 10 stout teeth on each side, the short apex 

 more or less erose; callosities frequently solitary, 1 mm. 

 broad, half as long as the valve, wrinkled and often crested ; 

 achene 1.5x2.5 mm. Sp. i. (1753), 336. From the 

 Mediterranean region, introduced in dry ground along the 

 Atlantic Coast, especially southwardly, and on the Pacific 

 slope. Specimens examined from Virginia (Morong, 

 1877; Seaman, 1877; Chickering, 1878; Vasey, 1878, 

 421), Charleston, S. C. (Hexamer and Maier, 1855, 22), 

 Mobile, Ala. (Mohr, 1871, 1890), Florida (Chapman), 

 Pointe a la Hache, La. (Langlois, 1883), Nevada (Engel- 

 mann, 1880), Oregon (Howell, 1887, 712), and California 

 (Torrey, 1865, 422; Palmer, 1876, 460 in part; Hilgard, 

 1891; Blankinship, 1891). Ballast specimens also from 

 New York (Brown) and Camden, N. J. (Parker, 1879; 

 Martindale, 1879, 1880.) Plate 29. 



18. R. OBTUSIFOLIUS, L. Two or three feet high, erect; 

 stem usually and sometimes strongly papillate; leaves 

 somewhat undulate, ample or the lowest very large, broadly 

 ovate, cordate, frequently acute, the often purple veins 

 papillate, especially beneath ; flowering branches sub-erect, 



