. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. MOSSES WITH A HAND-LENS 187. Acumcji, the gradually tapering narrow point of an acuminate leaf. (Fig. 2, b.) Acuminate, a term usually applied to leaves that gradually taper to a narrow point. A few recent writers use the term as applying, only to those leaves that are not uniformly narrow and limit the term acu- men to that part of the apex beyond the point where the narrowing begins to be less abrupt. According to those authors a leaf uniformly
. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. MOSSES WITH A HAND-LENS 187. Acumcji, the gradually tapering narrow point of an acuminate leaf. (Fig. 2, b.) Acuminate, a term usually applied to leaves that gradually taper to a narrow point. A few recent writers use the term as applying, only to those leaves that are not uniformly narrow and limit the term acu- men to that part of the apex beyond the point where the narrowing begins to be less abrupt. According to those authors a leaf uniformly narrowed would not be acumi- nate, no matter how slender the apex. The Fig. i. author has followed this usage to some extent in previous writ- ings, but general usage does not seem to sanction this restriction of the term. Acumination. See acumen and acuminate. Acute, with a sharp point, shorter than acuminate. Aggregate, clustered; usually applied to two or more sporo- phytes from one perichaetium. Alar cells, the cells at basal angles of the leaf, commonly dif- ferent from cells of the main part of the leaf, being shorter and often nearly square, or inflated and hyaline, and often highly colored. (Fig. 3.) Amphigastria, the third row of leaves found on the under side of the stems of the Hepaticae. Angular cells. See Alar cells. Antical, applied to that surface of the stems of hepatics which is uppermost when the stems are prostrate. Antheridium, the male reproductive organ con- taining the antherozoids. (Fig. 4.) Antherosoid, the small flagellate male cell which escapes from the antheridium, and in wet weather swims to the archegonium and down its neck to the egg-cell in the bottom. Apical cells, the cells composing the apex of the leaf. They are often broader and shorter than the cells of the middle of the leaf. Apophysis. See hypophysis, the more correct term accord- ing to Please note that these images are extracted from scanned page images that may have been
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