Cyathea_cranhamii_fertile_structures.jpg (291 × 341 pixels, file size: 44 KB, MIME type: image/jpeg)
Summary
editDetails of the preserved fertile structures of Cyathea cranhamii.
Original caption: Figs. 1–6. Cyathea cranhamii sp. nov. 1. Cross section of fertile pinnule and indusiate sorus showing anatomical features. Note bundle sheath extensions of mid- and lateral veins (V) and multicellular indusial wall (I). Paratype P13021Hbot #107c x85. Scale = 200 µm. 2. Longitudinal section of sorus attached superficially beneath lateral vein (V) of pinnule. Vascularized receptacle at R. Paratype P13021Hbot #114c x46. Scale = 250 µm. 3. Section of specimen in Figs. 1 and 2 at a level where two sori are attached. Paratype P13021Hbot #68c x46. Scale = 250 µm. Figs. 4–6 . Cross sections of one sorus showing features near base (Fig. 4 ), at mid-level (Fig. 5 ), and at apex (Fig. 6 ). Note distal slit that extends basally to mid-region (at arrows). Holotype P13021Hbot #91b, 56b, 45b, respectively, all x52. Scale = 250 µm
Source: Smith, Selena Y., Gar W. Rothwell & Ruth A. Stockey 2003. Cyathea cranhamii sp. nov. (Cyatheaceae), anatomically preserved tree fern sori from the Lower Cretaceous of Vancouver Island, British Columbia. American Journal of Botany 90: 755-760.
Copyright: © 2003 Botanical Society of America, Inc.
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:02, 1 July 2017 | 291 × 341 (44 KB) | DatBot (talk | contribs) | Reduce size of non-free image (BOT - disable) | |
20:27, 22 November 2006 | No thumbnail | 460 × 540 (146 KB) | Mgiganteus1 (talk | contribs) | == Summary == Details of the preserved fertile structures of ''Cyathea cranhamii''. '''Original caption:''' Figs. 1–6. Cyathea cranhamii sp. nov. 1. Cross section of fertile pinnule and indusiate sorus showing anatomical features. Note bundle sheath e |
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