A check list of North American birds /

Mode of access: Internet.

A synopsis of the North American lichens ...

"Recent authors on structure": v. 1, p. [xviii]-xx; "Works on lichens by Professory Tuckerman"; v. 2, p. [3]

Rubber-content of North American plants,

"Literature cited": p. 65.

A check list of North American amphibians and reptiles,

Mode of access: Internet.

Color key to North American birds ; with bibliographical appendix /

Bibliogr.

The North American Midwest, a regional geography.

Mode of access: Internet.

Catlin's notes of eight years' travels and residence in Europe with his North American Indian collection. With anecdotes and incidents of the travels and adventures of three different parties of American Indians whom he introduced to the courts of England, France and Belgium ...

Mode of access: Internet.

Bibliographical index to North American botany : or, citations of authorities for all the recorded indigenous and naturalized species of the flora of North America, with a chronological arrangement of the synonymy /

No more published.

North American flora.

Mode of access: Internet.

North American Cariceae /

Descriptive text on versos facing plates.

A monograph of the North American species of the genus Polygonum.

Mode of access: Internet.

A Serological and Disc Electrophoretic Study of North American Typha

Pollen and seed proteins of seven selected North American and Puerto Rican Typha populations were compared using two serological methods and disc electrophoresis. These methods were capable of discriminating among all taxa studied: Typha latifolia, T. angustifolia, T. X glauca, and T. domingensis. The two hybrid populations were found to contain proteins not found in either parent. Typha domingensis was serologically the most distinct of the four taxa. The diagnostic morphological characteristics for Typha species were studied in all populations, and statistical comparisons are presented. Data from the morphological observations agreed with the information obtained from the chemosystematic research. All data indicate that the three taxa should be maintained as separate species. The hybrid nature of the putative T. X glauca is verified by both the biochemical and morphological data. Observed morphological and biochemical differences support taxonomic treatments in which T. domingensis is designated as a separate species.