. Our native trees and how to identify them; a popular study of their habits and their peculiarities. Trees. FORM AND STRUCTURE that a number of pistils are found entirely separate ; as a rule they grow together and the parts unite or coalesce. A single pistil consi-sts of ovary, style and stigma. I'he Ovary is a hollow case which contains the ovules ; the Stig- ma is the upper part, usually flattened, which is covered by an adhesive secretion and which receives the pollen ; the Style connects the ovary and the stigma. It may be want- ing, the stigma is then said to be sessile. (Fig- 36.) The
. Our native trees and how to identify them; a popular study of their habits and their peculiarities. Trees. FORM AND STRUCTURE that a number of pistils are found entirely separate ; as a rule they grow together and the parts unite or coalesce. A single pistil consi-sts of ovary, style and stigma. I'he Ovary is a hollow case which contains the ovules ; the Stig- ma is the upper part, usually flattened, which is covered by an adhesive secretion and which receives the pollen ; the Style connects the ovary and the stigma. It may be want- ing, the stigma is then said to be sessile. (Fig- 36.) The Ovules are tiny sac-like bodies which after they receive the protoplasm of the polien develop mto Fig. 56.—Half a Cherry Blossom Show- ing Ovary, Style and Stigma. INFLORESCENCE. Inflorescence is a term used to denote the arrangement of the flowers on the stem. Flowers may occur singly or in clusters ; they may be terminal or axillary. Peduncle, is the stem of a solitary flower or of a flower cluster. Pedicel, is the individual stem of each flower in a cluster. Bract, is a small leaf found on a flower stem. Involucre, is a collection of bracts around a flower cluster or around a single flower. ^IG. 37. — Raceme of Barberry Blossoms. FLOWER CLUSTERS. Raceme, is a cluster in which the flowers are arranged along the central axis upon pedicels nearly equal in length, those nearest the base blooming first (Fig. 37). The central axis is called a rachis. When the pedicels divide and subdivide the raceme becomes a Panicle. When a panicle stiffens and becomes rigid and 5". Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Keeler, Harriet L. (Harriet Louise), 1846-1921. New York, C. Scribner's Sons
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkcscribnerss
