TILIA HETEROPHYLLA Ventenat. White Basswood. (× 1/2.)
Remarks.—Wood and uses similar to that of the preceding species. In Indiana the species are not commercially separated.
A satisfactory division of the species of Tilia of the United States has long been a puzzle. C. S. Sargent[65] has recently published his studies of the species and credits Indiana with two species and one variety. His range of Tilia neglecta might include a part of Indiana, and it may be that the pubescent forms of Tilia glabra in our area should be referred to that species. Specimens No. 28043 and 28047 in the writer's herbarium collected from trees on the high bluff of Graham Creek in Jennings County, Sargent refers to Tilia heterophylla variety Michauxii Sargent. While Sargent's key to Tilia quite distinctly separates the species and varieties, yet when specimens are collected from an area where the species overlap and seem to intergrade, the task of referring a specimen to the proper species or variety is not an easy one. In fact the writer acknowledges his inability to satisfactorily classify our forms of Tilia, and the present arrangement should be accepted as provisional.
CORNÀCEAE. The Dogwood Family.
Trees or shrubs; leaves simple, alternate, opposite or whorled; fruit mostly a drupe, 1 or 2 seeded.
| Leaves alternate; flowers of two kinds, the staminate in heads, 5-parted; stigmas lateral | [1 Nyssa.] |
| Leaves opposite; flowers perfect, 4-parted; stigmas terminal | [2 Cornus.] |