The induction, development, and heritability of fasciations . of light and of air. The following- plants were passed imder observation during the course ofthis study: Aster spinosns Benth.; Baccharis emoryi Gray; Celtis pallidaTorr.; Cernisgigantcus Englm.; Condalia spatJmlaca Gray; Covillea tridentataVail; Ephedra antisyphilitica C. A. Meyer; Foiiqideria splendens Englm.;Franseria djdnosa Gray; Ka^berlinia spinosa Zucc; Krameria caiiescens Gray;Olneya tesota Gray; ParJcinsoiiia aadeata L.; Parkinsoniainicrophylla Torr.;Parkinsonia torreyana Watson; Prosopis velutina Wooton; Salix nigra Marsh.
The induction, development, and heritability of fasciations . of light and of air. The following- plants were passed imder observation during the course ofthis study: Aster spinosns Benth.; Baccharis emoryi Gray; Celtis pallidaTorr.; Cernisgigantcus Englm.; Condalia spatJmlaca Gray; Covillea tridentataVail; Ephedra antisyphilitica C. A. Meyer; Foiiqideria splendens Englm.;Franseria djdnosa Gray; Ka^berlinia spinosa Zucc; Krameria caiiescens Gray;Olneya tesota Gray; ParJcinsoiiia aadeata L.; Parkinsoniainicrophylla Torr.;Parkinsonia torreyana Watson; Prosopis velutina Wooton; Salix nigra Marsh.;SaDibucits mcxicana Presl.; Zizyp/nis parryi Tow. SPECIAL PART: THE CHLOROPHYLL APPARATUS. Aster spinosus; Baccharis emoryi. (Fig. i.)These plants inhabit the wash along- the river and the irrigating- andwayside ditches, where water is frequently to be found. Aster spinosus isan annual with perennial root; Baccharis emoryi is perennial. Both Asterand Baccharis are usually devoid of leaves, but the young- portions at leastare supplied with rudimentary Fig. I.—Baccharis emoryi: A., segment from transverse section of youngstem to show the character of cortical chlorophyll band {ch. b.); i>, sec-tion of leaf, magnified as in A.^ Chlorophyll of the stem is confined to the cortex in both species and inboth the chlorenchyma is palisade. The palisade in the stems of each alsoclosely resembles that in the rudimentary leaves of the same species. Thissimilarity in the structure of the chlorophyll band* in the stem and of the *In all figures chlorophyll is indicated by stippling. TOPOGRAPHY OF CHLOROPHYLL APPARATUS IN DESERT PLANTS.
Size: 1905px × 1312px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectplants
