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![Botanical gazette. Plants. I9I9] HILL—ANATOM)• OF LVCOPODIUM 229. Fig. 3.—L. reflexum: stele showing radial arrangement of xylem with phloem located between protoxylem points and extending toward center of cylinder; X200. j--i%.](https://i0.wp.com/c8.alamy.com/comp/RHB3DA/botanical-gazette-plants-i9i9-hillanatom-of-lvcopodium-229-fig-3l-reflexum-stele-showing-radial-arrangement-of-xylem-with-phloem-located-between-protoxylem-points-and-extending-toward-center-of-cylinder-x200-j-i-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-hanover-ind-j-m-coulter-RHB3DA.jpg?ssl=1)
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![Botanical gazette. Plants. I9I9] WES TON—DICTYUCH US 293 that is customarily ascribed to the genus, nor has this phenomenon been reported in the case of other members of the family. In](https://i0.wp.com/c8.alamy.com/comp/RHA7T6/botanical-gazette-plants-i9i9-wes-tondictyuch-us-293-that-is-customarily-ascribed-to-the-genus-nor-has-this-phenomenon-been-reported-in-the-case-of-other-members-of-the-family-in-pyth-iwwi-however-which-is-more-or-less-closely-connected-with-the-sapro-legniaceae-according-as-one-or-another-of-the-several-theories-of-relationship-is-accepted-a-similar-double-swarming-of-laterally-bicihate-zoospores-has-been-reported-cornu-3-in-1872-first-noted-the-fact-as-follows-quotles-zoospores-dans-tous-ces-genres-please-note-that-these-images-are-extracted-from-scanned-page-images-that-RHA7T6.jpg?ssl=1)
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![Botanical gazette. Plants. I9I9] THOMPSON—COMPANION CELLS 453 indication of relationship between sieve tube and companion cell. The relative positions of these two elements is such as to indicate that they are](https://i0.wp.com/c8.alamy.com/comp/RHB284/botanical-gazette-plants-i9i9-thompsoncompanion-cells-453-indication-of-relationship-between-sieve-tube-and-companion-cell-the-relative-positions-of-these-two-elements-is-such-as-to-indicate-that-they-are-formed-from-two-successive-cells-in-a-row-and-that-they-are-products-of-the-same-mother-cambial-cell-this-relation-ship-was-mentioned-long-ago-by-debary-i-both-from-their-arrangement-in-cross-section-and-on-tracing-them-in-the-longi-tudinal-direction-it-often-has-the-appearance-as-if-the-cambiform-cells-arose-with-the-elements-of-the-sieve-tubes-from-one-mother-wmbsx-RHB284.jpg?ssl=1)
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![Botanical gazette. Plants. I9I9] WA TERM A N—ROOT S Y STEMS 43 Mycorrhiza.—The question of symbiotic fungi suggested itself early in the investigations, but there was no opportunity for a detailed](https://i0.wp.com/c8.alamy.com/comp/RHB426/botanical-gazette-plants-i9i9-wa-term-a-nroot-s-y-stems-43-mycorrhizathe-question-of-symbiotic-fungi-suggested-itself-early-in-the-investigations-but-there-was-no-opportunity-for-a-detailed-study-slight-examination-of-a-few-species-was-made-but-did-not-show-evidence-of-the-presence-of-such-fungi-enlarged-root-tipsa-frequently-observed-feature-of-many-of-the-dune-species-was-the-marked-enlargement-of-some-root-tips-the-tip-rapidly-increased-to-3-or-4-times-its-normal-diameter-and-then-gradually-tapered-away-again-the-extreme-length-of-the-enlarge-ment-being-20-30-times-its-gre-RHB426.jpg?ssl=1)
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![Botanical gazette. Plants. I9I9] MILLER—CYCAS MEDIA 215 they meander back and forth tangentially, so that only short patches can be caught here and there in a single radial section. The meandering](https://i0.wp.com/c8.alamy.com/comp/RHB3GB/botanical-gazette-plants-i9i9-millercycas-media-215-they-meander-back-and-forth-tangentially-so-that-only-short-patches-can-be-caught-here-and-there-in-a-single-radial-section-the-meandering-habit-is-not-so-pronounced-in-the-traces-and-consequently-longer-stretches-of-primitive-xylem-elements-can-be-seen-and-identified-as-such-secondary-xylem-of-the-normal-cylinder-is-composed-of-tra-cheids-which-are-characteristically-pitted-the-pits-being-confined-largely-to-the-radial-walls-as-described-by-both-chamberlix-and-jeffrey-the-phloem-situation-of-the-normal-cylinder-adds-emphasis-RHB3GB.jpg?ssl=1)
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![Botanical gazette. Plants. I9I9] OSTERIIOUT—PHOTOSYNTHESIS AND RESPIRATION 61 The bubbling must be continued until the color becomes constant. When this is achieved we know that equilibrium has been estab- lished between](https://i0.wp.com/c8.alamy.com/comp/RHB3XG/botanical-gazette-plants-i9i9-osteriioutphotosynthesis-and-respiration-61-the-bubbling-must-be-continued-until-the-color-becomes-constant-when-this-is-achieved-we-know-that-equilibrium-has-been-estab-lished-between-the-co2-in-the-liquid-and-that-in-the-chamber-in-order-to-determine-when-the-color-of-the-indicator-has-become-constant-it-is-compared-with-a-series-of-buffer-solutions-having-the-same-concentration-of-in-dicator-and-contained-in-pyrex-tubes-of-the-same-size-as-described-in-a-previous-article-the-plant-is-now-exposed-to-sun-light-after-exposure-the-gas-is-again-bubble-RHB3XG.jpg?ssl=1)
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