Richard Henry Yapp

Richard Henry Yapp (8 October 1871 - 22 January 1929) was a British professor of botany and a pioneer of ecology. He was the president of the British Ecological Society for the academic year 1920–1921. Quotes ... Filipendula ulmaria S. Ulmaria is widely spread over the north temperate and colder regions of the Old World. In Great Britain it is a common plant, being found in the whole of Hewett Watson Watson's 112 counties, ... whilst its altitudinal range is from the coast to some 2,700 Foot (unit) feet above sea-level....Itself a characteristic plant of the drier parts of marshes and fens, ... the habitat of Filipendula ulmaria Spiraea Ulmaria is usually where the Soil moisture water content of the soil is considerable rather than excessive. It prefers soils with a high water capacity, such as peat or clay. Provided that its needs in respect to soil moisture are satisfied, it will grow almost anywhere: at the edges of marshes and rivers; in the damper parts of meadows; in roadside ditches; on the sea-coast; ... in damp hollows between sand-dunes; ... and even in woods, if the shade is not too dense. ... It readily colonizes moist ground which has been recently disturbed; and hence frequently establishes itself at the foot of railway embankments, &c. July 1912 26 103 Spiraea ulmaria, L., and its bearing on the problem of xeromorphy in marsh plants Annals of Botany 815–870 https://ia800607.us.archive.org/view_archive.php?archive=/8/items/crossref-pre-1923-scholarly-works/10.1093%252Foxfordjournals.aob.a089235.zip&file=10.1093%252Foxfordjournals.aob.a089419.pdf (quote from pages 818–819 — Spiraea ulmaria is a synonym for Filipendula ulmaria.) Topography Topographic and Biome biotic factors, though frequently of great importance, are usually indirect in their action, influencing plants by modifying more direct factors. Thus mountain ranges influence climate. Local differences of Aspect (geography) aspect or Grade (slope) angle of a slope affect temperature, light, wind and drainage. Associated plants modify light and Humidity atmospheric humidity for each other. Nitrifying bacteria, earthworms, etc., exert a far-reaching influence on the chemical and physical characters of the soil, and so on. The Concept of Habitat The Journal of Ecology 10 1 May 1922 1–17 https://books.google.com/books?id=H7I7AQAAMAAJ&pg=PA5 (quote from p. 5) Botany: A Junior Book for Schools (1923) It has been said, and with more than element of truth, that the least important part of education is the acquisition of knowledge. The facts of nature, as such, have intense fascination for the nature-lover, yet the value of a mere knowledge of facts may easily be over-estimated. Facts are really tools, the value of which lies in the uses to which they may be put. Of far deeper importance, therefore, than the mere committing of facts to memory, is the acquisition of correct habits of study. Habits, that is, of patient and accurate observation, and of clear and logical interpretation and correlation of the facts observed. Facts may be forgotten, but habits remain. Preface v–vii Botany: A Junior Book for Schools Cambridge University Press 1923 https://books.google.com/books?id=jQ9ujd6ZPaMC&pg=PR5 (quote from p. v; 199 pages) Each Acer pseudoplatanus Sycamore fruit has two (sometimes three or more) thin flat Glossary of botanical terms#W wings ..., at the base of each of which is a swollen part, lined with hairs and containing a single seed. The seed is covered by a thin brown testa. If you scrape away the testa you will find the Seed#Embryo embryo inside, consisting, as in the Bean, of a radicle, two cotyledons, and a very minute plumule. The cotyledons are green and long and narrow, and are coiled into a sort of ball ...; they too contain a store of food. p. 20 External links Category:1871 births Category:1929 deaths Category:Academics from England Category:Botanists from England Category:Curators Category:Ecologists Category:Explorers from England Category:Non-fiction authors from England Category:Science authors Category:University of Birmingham faculty Category:University of Cambridge alumni