Das Pflanzenreich Regni Vegetabilis Conspectus, Vol. 4: Im Auftrage Der Preuss. Akademie Der Wissenschaften; 117, Saxifragaceae-Saxifraga (Classic Reprint)
Das Pflanzenreich Regni Vegetabilis Conspectus, Vol. 4: Im Auftrage Der Preuss. Akademie Der Wissenschaften; 117, Saxifragaceae-Saxifraga (Classic Reprint)
Excerpt from Das Pflanzenreich Regni Vegetabilis Conspectus, Vol. 4: Im Auftrage der Preuss. Akademie der Wissenschaften; 20, (101, Heft), Cyperaceae-Scirpoideae-Cypereae Vegetationsorgane. 1. Wurzel und Rhizom. Wahrend die Caricoideae ohne Ausnahme perennierende Gewaohse sind, gibt es unter den Scirpoideae und speziell unter den Cypereae namentlich in den Untergattungen Eucyperus und Pycreus auch einj???hrige. Es sind dies in der Regel niedrige zarte Pfl???nzchen mit rinnigen Bl???ttern und reduziertem Bl???tenstand. Sie ...
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Excerpt from Das Pflanzenreich Regni Vegetabilis Conspectus, Vol. 4: Im Auftrage der Preuss. Akademie der Wissenschaften; 20, (101, Heft), Cyperaceae-Scirpoideae-Cypereae Vegetationsorgane. 1. Wurzel und Rhizom. Wahrend die Caricoideae ohne Ausnahme perennierende Gewaohse sind, gibt es unter den Scirpoideae und speziell unter den Cypereae namentlich in den Untergattungen Eucyperus und Pycreus auch einj???hrige. Es sind dies in der Regel niedrige zarte Pfl???nzchen mit rinnigen Bl???ttern und reduziertem Bl???tenstand. Sie bevorzugen Standorte mit feuchtem sandigen Untergrund, in welchem sie sich durch zahlreiche fadenf???rmige Nebenwurzeln befestigen (fig. Cyperus haspan L. Besitzt typisch ein verl???ngertes Rhizom mit gestreckten Internodien [vgl. C. B. Clarke in J ourn. Linn. Soc. XXL (1884) Nicht selten verk???rzt sich das Rhizom und erscheint gestaucht. Es kommen aber auch im ersten J ehre bl???hende und fruchtende Exemplare mit Faserwurzel vor. Solche Exemplare sind von jugendlichen P anzen des stets annuellen kurzlebigen Cyp. Tenuispica Steud. Schwer zu unterscheiden. Man mu??? die Tatsache anerkennen, da??? perennierende Cyperusarten unter besonderen Umst???nden auch als einj???hrige P anzen mit Faserwurzel auftreten k???nnen. Das normale und primitive Verhalten bleibt jedoch die Ausbildung eines ausdauernden Wurzelstocks mit durchweg sympodialer Spro???verzweigung [vgl. Pax in Engl. U. Prantl, Nat. P anzenfam. II. 2. (1887) 99, Fig. Die vollkommene Entwicklung zeigt das Rhizom in horizontaler Lage in der Erde kriechend mit in die L???nge gestreckten Internodien. J edes Internodium ist mit einem ovalen oder lanzettlichen dunkelgef???rbten Niederblatt versehen, welches als Scheide einer reduzierten Spreite zu gelten hat und sich beim Absterben in die faserartig stehen bleibenden Gef??????b???ndel aufl???st (fig. 1a). Sehr h???ufig bleiben aber die Internodien j; gestaucht und das verkurzte Rhizom steigt schief oder senkrecht abw???rts. Monopodiale Rhizomverzweigung, wie sie zuweilen bei Carex auftritt, kommt bei Cyperus niemals vor. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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