Otto Emery Jennings
Published: 2012-01
Total Pages: 446
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: ABBREVIATIONSAND SIGNS USED IN THE MANUAL cm., Centimeter, equals the one-hundredth part of a meter, er about two-fifths of an inch. mm., Millimeter, equals one-tenth of a centimeter. D.A.B., D. A. Burnett. G.K.J., Grace K. Jennings (Mrs. O. E. Jennings). J.A.S., Dr. John A. Shafer. mm., Millimeter, equals about one twenty-fifth of an inch. O.E.J., O. E. Jennings. - The short clash used between figures or between words denotes either an intermediate state or a variation from one to the other extreme. chapter{Section 4ANALYTICAL KEY TO THE GENERA OF MOSSES OF WESTERN PENNSYLVANIA Order l.?SPHAGNALES Whitish mosses with fasciculate branches, mostly bog plants; leaf-cells of two kinds, ? large hyaline ones separated by narrow chloro- phyllose ones; ecostate; operculate but with no peristome. Sphagnum, p. 3 Order II.?ANDRBAEALES Dark colored or blackish alpine or subalpine plants growing in cushions on granitic or slaty rocks; either costate or ecostate; leaf-cells small and quite opaque; capsule dehiscing by four longitudinal slits, the valves remaining united at the apex. Andrcaea, p. 46 Order III.?BRYALES Leaves various but not sphagnoid, costate or ecostate; capsule dehiscing irregularly or, more often, by a deciduous operculum, often furnished with a peristome, never four-valved as in Andreaea, plants largely green I. I. Sporophyte borne at the apex of the main stem, sometimes appearing lateral by the growth of a branch A. Acrocarpi, p, 48 I. Sporophyte borne at the apex of a short lateral branch B. Pleurocarpi, ste p. 16 A. ACROCARPI 1. Capsule non-operculate 2. 1. Capsule operculate 10. 2. Green protonema persistent; plants fruiting in autumn Ephemerum, p. 127 2. Green protonema not persistent, plants fr..