File:Contributions from the Botanical Laboratory, vol. 1 (1892) (20499782219).jpg

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Title: Contributions from the Botanical Laboratory, vol. 1
Identifier: contributionsfro01unix (find matches)
Year: 1892 (1890s)
Authors: University of Pennsylvania. Botanical Laboratory
Subjects: Botany; Botany
Publisher: Philadelphia : University of Pennsylvania Press
Contributing Library: Penn State University
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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^4 Macfarlanc.—DioncBa Miiscipula, Ellis. The relatively large number of leaves provided with more than six hairs, that the writer has encountered, probably points to a condition when the hairs were more diffuse in their distribution; while the close similarity in development and structure between the brown stellate leaf hairs and the secreting glands, favors the view that the latter are merely specialized examples of the former. EXPLANATION OF PLATE IV. Illirstrating Dr. J. M. Macfarlane's paper on Dioncea. Fig. I. Surface view of lower part of sensitive hair, a, base of hair j b, sensitive joint; c, shaft. The cell wall surfaces of b exhibit minute pit areas, x 400°. Fig. 2. Longitudinal median section of lower part of sensitive hair •,. X 400°. Fig. 3. Transverse section of hair at junction of base and joint cells ; X 400°. Fig. 4. Outline surface view of secreting gland; X 400°. Fig. 5. a,b,c and d. Forms of hair from lower leaf surface ; X 400°. Fig. 6. Vertical section of gland parallel to secondary leaf bundles; X 400°. Fig. 7. Vertical section of gland at right angles to the last. Fig. 8. Surface view of epidermal cells, after slight treatment with dilute sulphuric acid and eosin staining ; X °75o. Fig. 9. Surface view of epidermal cells after iodine and sulphuric solution treatment and eosin staining. The continuity of the intercellular protoplasmic threads is traceable; X 750°. Fig. 9a. Portion of swollen cell wall penetrated by intercellular pro- toplasmic threads. The thickened areas in the three figures are rather exaggerated in amount. Vol. I V\l\W'\. Bol.Colli. I '^Msvlvajiia. 9
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Author University of Pennsylvania. Botanical Laboratory
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Flickr tags
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  • bookid:contributionsfro01unix
  • bookyear:1892
  • bookdecade:1890
  • bookcentury:1800
  • bookauthor:University_of_Pennsylvania_Botanical_Laboratory
  • booksubject:Botany
  • bookpublisher:Philadelphia_University_of_Pennsylvania_Press
  • bookcontributor:Penn_State_University
  • booksponsor:Lyrasis_Members_and_Sloan_Foundation
  • bookleafnumber:42
  • bookcollection:penn_state_univ
  • bookcollection:microfilm
  • bookcollection:americana
  • bookcollection:additional_collections
  • BHL Collection
Flickr posted date
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18 August 2015



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