ISSN:0040-0262    

DOI:10.2307/1223016

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryRecently, attention has been focused on the evolutionary role of heterochrony (phyletic change in the timing of development). Heterochrony results in the condition of paedomorphosis, the retention of juvenile features of an ancestor in adults of a descendent. Relatively few examples of evolution via heterochrony are known among flowering plants, due to the vague demarcation of juvenile and adult stages. Recent systematic studies among the endemic Hawaiian Lobelioideae (Campanulaceae) have revealed the occurrence of a significant example. The endemic genusCyaneaincludes several species that produce morphologically distinct juvenile forms. The four species of theC. solanaceacomplex form a monophyletic lineage in which the adults of each species resemble juveniles of the next more primitive species, i.e., adults of the more derived species are progressively more juvenile in appearance. It is hypothesized that theC. solanaceacomplex is a paedomorphic lineage, in which successive heterochronic events have produced a sequence of progressively more paedomorphic species.

ISSN:0040-0262    

DOI:10.2307/1223017

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryJanice Carson Beatley, native Ohio botanist of the United States, will be remembered for her contributions toward the understanding of the wintergreen herbaceous flora of the deciduous forest region, the primeval forests of the unglaciated plateau in southeastern Ohio, and the ecological relationships of the vascular‐plant flora of the Atomic Test Site in south‐central Nevada. Throughout her professional life, Dr. Beatley was an outspoken advocate for ecological and environmental concerns while employed in seven different academic and research institutions and through active memberships in seven societies, whose mission is to save habitats and environments of natural areas. In her last academic appointment as a professor of biological sciences at the University of Cincinnati (1973‐1987), Dr. Beatley taught courses in plant ecology and field botany and continued her research on the flora of the Nevada Test Site. In that capacity she fulfilled a long dream of returning to Ohio and teaching in the same department where Dr. E. Lucy Braun, the eminent plant ecologist, taught for 34 years and maintained her lifetime affiliation. Death came to Janice at age 68, on 14 November 1987 in Cincinnati, Ohio.As a lasting memorial in recognition of Janice C. Beatley's research in plant systematics and ecology, her brother and sister, Charles E. and Mary A. (Beatley) Jordan, presented a gift of $50,000 to the Herbarium of The Ohio State University, 16 November 1988. This donation provides for a permanent endowment from which the generated interest money will be available for field research by graduate students in the plant systematics and plant ecology programs within the Department of Botany at The Ohio State University.

ISSN:0040-0262    

DOI:10.2307/1223018

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryThe historical circumstances that have led to the confusion ofSynthyris missurica(Raf.) Pennell, reputed type ofSynthyris[which is based on the first known synthyris collection (Lewis and Clark, 26 June 1806)], andSynthyris reniformis(Douglas) Benth., the first species listed by Bentham in the protologue ofSynthyris, are chronicled. One hundred and forty‐four years after circumscription, the type ofSynthyris, S. reniformis, is correctly identified.

ISSN:0040-0262    

DOI:10.2307/1223019

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryA new, more advanced technique of preserving and documenting whole flower preparations from herbarium specimens utilizing a transparent supporting material is described. This technique offers two major advantages. First, the preparation leads to excellent preservation of the specimen even after many decades. Second, the preparation can be used to directly produce high quality photographs of even the most delicate of floral characters including floral vasculature.

ISSN:0040-0262    

DOI:10.2307/1223020

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryThe need to re‐examine spores ofIsoetesspecimens has led to serious depletion of the supply of both microspores and megaspores in many voucher specimens. Some type specimens no longer possess any spore material, seriously limiting the research value of these critical vouchers. A simple device is described that permitsIsoetessamples to be handled, examined microscopically and even safely mailed without requiring repeated mining of the finite supply of spores.

ISSN:0040-0262    

DOI:10.2307/1223021

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1223022

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1223023

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1223024

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1223025

出版商:Wiley    

年代:2019

数据来源: WILEY