Twice I have made a list of the species of wild plants found in a mile's walk - on one occasion from my residence, by way of street and canal-side, to Fair Grounds, on the edge of the town; on the other, going over ground some hundreds of feet removed from this, but still embracing a like amount of dry and wet soil. On each trip the number of species noted was either ninety-six or ninety-seven - the number overlooked being perhaps twenty or thirty.

In a walk of equal length - but including digressions laterally from 75 to 100 feet - along the edge of the river at Santa Cruz, Cal. - the ground being sandy, in parts quite damp and subject to overflow in spring - 120 species were booked. The time in each case was from two to three hours.

Two or three short subsequent visits to the same ground along the San Lorenzo yielded me about thirty additional species, with perhaps as many as twenty-five to fifty species overlooked.

In corresponding localities, or situations, this proportion of wildlings for the two sections - the Pacific and Atlantic coasts - would probably hold good. Rochester, N. Y.