Image from page 165 of “Introduction to botany” (1902)

Image from page 165 of

Identifier: introductiontobo00stev
Title: Introduction to botany
Year: 1902 (1900s)
Authors: Stevens, William Chase, 1861- Stevens, William Chase, 1861- Introduction to botony : key and flora
Subjects: Botany
Publisher: Boston : D.C. Heath & Co.
Contributing Library: Internet Archive
Digitizing Sponsor: Internet Archive

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Text Appearing Before Image:
Fig. 74. Study of Capsella biirsa-pastoris (Shepherds purse). A type page of StudentsLaboratory Book : a, entire plant: b, a flower enlarged ; c, longitudinal diagramof an open flower; d, cross diagram of a flower; ^.longitudinal diagram of a bud ;f, a petal; g, a sepal; h, a stamen before the opening of the anther ; /, a stamenafter the anther has broken open to discharge the pollen ; /, a pistil enlarged,with nectaries at its base; k, an ovule enlarged; /, the fruit or ripened pistil;m, fruit dehiscing. I50 Introduction to Botany.

Text Appearing After Image:
FIG. 75.Guide forms for drawing flowers. See text. same thing is illustrated for a cruciferous flower in E, Fy and G. Compare also thediameters of the threefaces of diagram K. In drawing long ormuch-curved leaves it isa good plan to draw themidrib first, and so estab-lish the total length andright curvature; then ata point on the midribwhere the leaf is broadesta line should be drawn atright angles with themidrib, establishing thebreadth of the leaf in right proportion to the length. Last, the outline of the leaf should be drawn, and the venation put in {d, Fig. /6). If the leaf is divided or com-pounded, the general outline of the leaf and the veins or midribs of the leaflets should be made as already directed, and then the outhnes of the leaflets should be drawn, as in e, Fig. yG. All guide lines should, of course, be drawn with- a very light touch, and erased after the flowers and leaves have been outlined. 122, With a sharp knife make cross and vertical sections of the ovary, and

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Posted by Internet Archive Book Images on 2014-07-28 05:44:23

Tagged: , bookid:introductiontobo00stev , bookyear:1902 , bookdecade:1900 , bookcentury:1900 , bookauthor:Stevens__William_Chase__1861_ , bookauthor:Stevens__William_Chase__1861__Introduction_to_botony___key_and_flora , booksubject:Botany , bookpublisher:Boston___D_C__Heath___Co_ , bookcontributor:Internet_Archive , booksponsor:Internet_Archive , bookleafnumber:165 , bookcollection:internetarchivebooks , bookcollection:americana , BHL Collection

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