Nature and development of plants . The basal portion of the sporo
![](https://c8.alamy.com/comp/2AXH45J/nature-and-development-of-plants-the-basal-portion-of-the-sporo-phyte-develops-into-a-massive-foot-often-provided-with-rhizoidal-like-outgrowths-which-serve-as-a-very-efficient-absorbing-organthe-upper-portions-of-the-sporophyte-present-a-remarkableseries-of-differentiations-the-outer-part-of-it-consists-of-chloro-phyll-bearing-cells-in-which-for-the-first-time-genuine-stomataappear-fig-199-ch-within-this-zone-of-chlorenchyma-is-adome-shaped-layer-of-spore-mother-cells-alternating-with-sterilecells-which-in-some-genera-develop-as-elaters-in-the-center-ofthe-sporophyte-is-a-mass-o-2AXH45J.jpg)
Download this stock image: Nature and development of plants . The basal portion of the sporo-phyte develops into a massive foot, often provided with rhizoidal-like outgrowths, which serve as a very efficient absorbing organ.The upper portions of the sporophyte present a remarkableseries of differentiations. The outer part of it consists of chloro-phyll-bearing cells in which, for the first time, genuine stomataappear (Fig. 199, ch). Within this zone of chlorenchyma is adome-shaped layer of spore mother cells alternating with sterilecells which in some genera develop as elaters. In the center ofthe sporophyte is a mass o - 2AXH45J from Alamy's library of millions of high resolution stock photos, illustrations and vectors.
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Basal layer hi-res stock photography and images - Page 3 - Alamy
![](https://c8.alamy.com/comp/2AXGYRH/nature-and-development-of-plants-removed-6-section-of-nearly-mature-capsulesp-spore-forming-cellssurrounded-on-outside-by-loosely-arranged-chlorophyll-bearing-cells-0operculum-r-annulus-p-peristome-a-apophysis-8-magnified-view-ofa-portion-of-the-capsule-showing-the-annulus-r-and-the-thick-walled-cellsof-the-peristome-p-which-are-attached-at-their-base-to-the-epidermis-bya-double-row-of-cells-sp-spore-forming-cells-7-the-cells-shown-in-8-phave-split-apart-thus-forming-the-inner-and-outer-teeth-like-segments-ofthe-peristomeafter-sachs-280-evolution-of-liryophyta-v-2AXGYRH.jpg)
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Natur und Entwicklung von Pflanzen . Der basale Teil des Sporophyten entwickelt sich zu einem massiven Fuß, der oft mit rhizoidartigen Auswüchsen versehen ist, die als sehr effizientes absorbierendes Organ dienen.Die oberen
![](https://c8.alamy.com/comp/2AXH091/nature-and-development-of-plants-capsule-that-has-been-freed-of-itscalyptra-you-will-see-that-the-spore-producing-tissue-is-relativelysmall-and-appears-as-a-hollow-cylinder-instead-of-a-dome-shapedzone-of-cells-figs-210-3-211-6-this-sporogenous-tissueis-usually-surrounded-on-the-outside-and-less-commonly-on-theinside-by-loose-chlorophyll-bearing-cells-which-extend-down-tothe-base-of-the-capsule-where-chlorenchyma-and-stomata-aredeveloped-this-lower-region-of-the-capsule-the-apophysisis-often-enlarged-and-provided-with-air-spaces-and-stomata-thusconstituting-the-chief-photosynthe-2AXH091.jpg)
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Natura e sviluppo delle piante . La porzione basale dello sporo-fitte si sviluppa in un piede massivo, spesso dotato di outgrowths di tipo rizoidale, che servono come organo assorbente molto efficiente. Le
![](https://c8.alamy.com/comp/2AXGHD0/nature-and-development-of-plants-opyle-this-substance-in-drying-contracts-andpulls-the-spores-in-large-numbers-through-the-micropyle-intoa-chamber-formed-in-the-upper-part-of-the-sporangium-fig245-p-as-has-been-stated-the-microspore-begins-to-germinatein-its-own-sporangium-and-by-the-time-that-it-reaches-the-cavityof-the-megasporangium-its-nucleus-has-already-divided-twiceforming-a-rudimentary-male-gametophyte-that-may-be-comparedwith-that-of-selaginella-fig-247-a-the-cell-g-representingthe-small-cell-and-the-cell-a-corresponding-to-the-large-anthe-ridial-cell-of-the-gamet-2AXGHD0.jpg)
Nature and development of plants . into an upper part or pileus and a basal region,the stalk or stipe. As this growth proceeds the mass of hyphaeextending from the margin of the
![](https://c8.alamy.com/comp/PG0266/photomicrographs-of-botanical-studies-photomicrography-phiitoiiiicrographs-of-botuiiical-studies-23spores-and-elators-from-fertile-head-of-quot-equisetum-telmateiaquot-spores-and-elaters-from-sporangia-of-no-22-24-ts-stem-of-quot-selaainella-wildenoviiquot-r-lipidermis-cortical-tissue-ascular-bundles-xylem-of-bundle-frebeculk-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-work-flatters-milbo-PG0266.jpg)
Elaters hi-res stock photography and images - Page 2 - Alamy
![](https://c8.alamy.com/comp/2AN9G6T/the-induction-development-and-heritability-of-fasciations-mechanical-stratum-which-for-conveniencewill-be-termed-the-median-band-of-chlorenchyma-in-the-younger-stems-themedian-band-is-practically-continuous-but-in-the-older-ones-it-becomesbroken-up-into-distinct-masses-from-the-median-band-there-passes-inwardlike-the-spokes-of-a-wheel-the-medullary-rays-of-the-inner-part-of-the-cortexthese-rays-in-the-younger-branches-are-well-supplied-with-chlorophyll-turning-now-to-the-woody-cyhnder-we-find-that-the-medullary-rays-aportion-of-the-wood-parenchyma-and-the-pith-are-chlorophyll-be-2AN9G6T.jpg)
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Elaters hi-res stock photography and images - Page 2 - Alamy
![](https://c8.alamy.com/comp/RE1PTP/nature-and-development-of-plants-botany-development-of-plants-283-like-pore-over-the-center-of-each-cavity-from-the-bottom-of-the-chamber-numerous-delicate-chlorophyll-bearing-cells-arise-this-arrangement-of-the-tissues-is-again-suggestive-of-the-chlor-enchyma-of-the-leaf-and-it-is-manifestly-protective-and-adapted-to-photosynthesis-the-structure-of-the-lower-cells-of-the-thallus-fig-188-section-through-the-center-of-the-thallus-of-marckantia-show-ing-one-of-the-air-chambers-and-chimney-like-pores-in-the-epidermisch-palisade-like-chlorenchyma-arising-from-bottom-of-air-chamber-RE1PTP.jpg)
Chlorenchyma hi-res stock photography and images - Alamy
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Spore bearing cells hi-res stock photography and images - Alamy