At the West Virginia University Herbarium, the author has gleaned the following information about West Virginia species in the last year (1980).
At the West Virginia University Herbarium, the author has gleaned the following information about West Virginia species in the last year (1980).
Recent collections of these grasses are apparently the first for the state. They were not included in my recent publication (Allen, 1980).
It has been recognized for some time that Senecio aureus L. and S. robbinsii Oakes hybridize frequently where sympatric in the northeastern U. S. and extreme southeastern Canada.
Aerial photography indicated that Justicia americana is confined to the hardwater section of the New River. This species was determined to be moderately calciphilous based on average conductivity and hardness ratio of the water it inhabited. Productivity and standing crop averaged 23.3 g ash free dry weight (AFDW) m-2 d-1 and 2524 g AFDW m-2, respectively. Productivity of J. americana was 4-5 times greater than other major aquatic species in the New River and, in spite of its limited distribution, contributed 12% of the total aquatic macrophyte organic matter input to the river.
The quadrat method was used to sample arborescent vegetation in southern Delaware, where conditions are suitable for the establishment and growth of bald cypress, Taxodium distichum (L.) Richard. Taxodium is dominant in Trussum and Trap Ponds and is associated with Acer rubrum, Nyssa biflora, and Ilex opaca on the banks of James Branch and its tributaries. Logging, severe fire, and the conversion of forests to farmland have removed most bald cypress from southern Delaware, the northern-most limit of the species
The Manual of the Vascular Flora of the Carolinas was used to tabulate certain distributional, morphological, and phenological characteristics of the flora of North and South Carolina. Modal (most frequent) characteristics of the flora are: Coastal Plain occurrence (26%), forest habitat (54%), dicotyledonous (68%), deciduous (95%), perennial (76%), herb (81%), herbaceous (84%), perfect (76%), alternate leaves (54%), entire leaves (53 %), glabrous (51 %), not succulent (98%), not laticiferous (97%), not aromatic (93%), no or inconspicuous perianth (31 %), chromosome number (n) = 11-20 (43%), June-blooming (53%), blooming duration 3 months (32%), and not endangered/threatened (88%).
This revised and updated checklist supersedes the older one, published in 1953 (USDA Handbook No. 41), and has been used as a means of making available to many professional people the numerous changes in tree systematics since 1953.
Observations made in late October, 1979, indicate that the wasp, Polistes fuscatus, and the locust borer, Megacyllene robiniae, serve as selective pollinators of goldenrod (Solidago canadensis). The pollination system is probably a complicated one involving mimicry between these (and perhaps other) insects and possible specialized roles in cross versus self-pollination. A differential pollination of the fall weed flora (e.g., Solidago canadensis vs. Aster spp.) was evident, and is deserving of further investigation
The distribution of swamp forest sites as indicated by Quercus bicolor is mapped for the Bluegrass and Knobs regions of Kentucky. Most of these are on high level terraces probably deposited by rivers ponded during glaciation. For some sites species lists are presented and a preliminary analysis reveals compositional variation related to soil moisture and perhaps pH. Records of Q. bicolor, Q. michauxii and Habenaria spp. from these previously little described forests extend their known ranges. The urgent need for conservation of these swamp forests is discussed
Nearly any botanist in this country will recognize this title, as the book is a very well known general botany (physiology) textbook. The first edition was done about twenty years ago, was revised in 1964, and now has been completely rewritten and enlarged.