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Document Type

Research

Abstract

Indigenous to North America there are several species of Pyrus belong to the Malus or apple group. Sargent, in his Silva of North America, gives three species and one variety. These are P. rivularis Doug., found west of the Rocky Mountains from northern California to Alaska; P. angustifolia Ait., ranging from Pennsylvania to Tennessee and Florida; P. coronaria L., in the region from New York to Michigan, southward and westward to Missouri and Kansas; P. coronaria var. Iowensis, Wood, confined to the prairie states. In the American Garden, XII, 473, 1891, Professor Bailey raised var. Iowensis to specific rank, basing his decision upon fruit and leaf characteristics, and in the same article described the Soulard crab as a species. Later, however, he expressed it as his opinion that the latter is a hybrid, so according to the present classification, we have the four species, P. rivularis, P. angustifolia, P. coronaria, and P. Iowensis.

Publication Date

1899

Journal Title

Proceedings of the Iowa Academy of Sciences

Volume

7

Issue

1

First Page

123

Last Page

141

Copyright

© Copyright 1899 by the Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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