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Chromosome Counts for Callitriche (Callitrichaceae) in North America
No full textSomatic chromosome numbers are reported for nine species and one variety of Callitriche (Callitrichaceae). The following new reports are included: 2n = 20 (C. nuttallii, C. marginata), 2n = 40 for one of four populations of C. heterophylla var. heterophylla, 2n = 40 (C. trochlearis), 2n = 10 (C. peploides, C. terrestris)
Enduring Traditions: The Native Peoples of New England
No full textA collection of native New England histories written by anthropologists, native peoples, ethnobotanists and art historians. This collection of Native American histories written by anthropologists, native peoples, ethnobotanists, and art historians covers the time period from the late prehistoric to the present. Wampanoag, Pequot, Mohegan, Narragansett, Schaghticoke, Penobscot, and Passamaquoddy peoples are chronicled by recognized scholars who have chosen to focus on pertinent issues related to each tribe, such as European contact and trade, native foods, charismatic leaders, native politics and survival strategies, communities, and arts and symbolism. Introduced and edited by Laurie Weinstein, the author of the renowned 1989 volume on the Wampanoag, this work fills a large gap in the literature by and about native Northeastern peoples of America.This record is for the paperback edition of the book; a hard cover edition is also available from the publisher.</p
Exine Reduction in Underwater Flowering Callitriche
No full textBoth aerial and underwater pollination systems (hypohydrophily) occur in Callitriche (Callitrichaceae), and as such the genus can serve as a model system in which to probe questions concerning the evolution of hypohydrophily from aerial pollination systems. Evidence from scanning and transmission electron microscopy reveals strikingly different exine thickness in the pollen of four aerially flowering species (C. heterophylla var. bolanderi, C. marginata, C. peploides, and C. stagnalis), which have a distinct sexine layer (0.55—1.1 μm thick), in comparison with that of the hypohydrophilous C. hermaphroditica. The exine of the latter species is rudimentary