Spore Morphology of the Polypodiaceae of Northeastern North America. I.

1974 ◽  
Vol 101 (6) ◽  
pp. 326 ◽  
Author(s):  
Alice J. Belling ◽  
Calvin J. Heusser
Keyword(s):  
North America ◽  
Spore Morphology ◽  
Northeastern North America

Spore morphology and taxonomy of Isoetes in northeastern North America

1983 ◽  
Vol 61 (12) ◽  
pp. 3140-3163 ◽  
Author(s):  
L. Kott ◽  
D. M. Britton
Keyword(s):  
North America ◽  
Spore Morphology ◽  
Key To Species ◽  
Northeastern North America ◽  
Spore Size ◽  
Distribution Maps

Taxonomy of Isoetes L. largely rests on megaspore and microspore wall ornamentation and spore size. These characters have been reevaluated and the range of their variability is described (SEM photographs). Eight species of Isoetes are recognized for northeastern North America: I. macrospora, I. hieroglyphica, I. tuckermanii, I. riparia, I. acadiensis, I. echinospora, I. eatonii, and I. engelmannii. Each species is provided with a revised list of synonyms, description, ecological notes, representative specimens, and distribution maps. A key to species is provided.

FABRIC OF THE LITHOSPHERE IN NORTHEASTERN NORTH AMERICA

2019 ◽  
Author(s):  
Yiran Li ◽  
◽  
Vadim Levin ◽  
Zhenxin Xie
Keyword(s):  
North America ◽  
Northeastern North America

Early Maize in Northeastern North America: A Comment on Emerson and Colleagues

2021 ◽  
Vol 86 (2) ◽  
pp. 425-427
Author(s):  
John P. Hart ◽  
William A. Lovis ◽  
M. Anne Katzenberg
Keyword(s):  
North America ◽  
Great Lakes ◽  
Empirical Evidence ◽  
River Valley ◽  
Human Bone ◽  
Northeastern North America ◽  
Isotopic Evidence ◽  
St Lawrence River

Emerson and colleagues (2020) provide new isotopic evidence on directly dated human bone from the Greater Cahokia region. They conclude that maize was not adopted in the region prior to AD 900. Placing this result within the larger context of maize histories in northeastern North America, they suggest that evidence from the lower Great Lakes and St. Lawrence River valley for earlier maize is “enigmatic” and “perplexing.” Here, we review that evidence, accumulated over the course of several decades, and question why Emerson and colleagues felt the need to offer opinions on that evidence without providing any new contradictory empirical evidence for the region.

Establishing Alpine Research Priorities in Northeastern North America

2013 ◽  
Vol 20 (4) ◽  
pp. 559 ◽  
Author(s):  
Robert S. Capers ◽  
Kenneth D. Kimball ◽  
Kent P. McFarland ◽  
Michael T. Jones ◽  
Andrea H. Lloyd ◽  
...  
Keyword(s):  
North America ◽  
Research Priorities ◽  
Northeastern North America ◽  
Alpine Research
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