WebThe toxicity of cycads has long been known by natives, who have developed careful and extensive procedures to remove the poisonous substances from cycad plant products. … Web8 Dec 2004 · Cycads are the older group ( Soltis & Soltis 2003) and may represent the origin of insect pollination, although extinct seed ferns and gymnosperms (Caytoniales and Bennettitales) may also have been insect pollinated ( Labandeira 2002; Pellmyr 2002 ).
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Web5 Oct 2007 · Cycads are dioecious gymnosperms, with male and female individuals, of Permian origin. Cycads share obligate mutualisms with specialist insect pollinators, … WebVascular plants; sporophyte differentiated into stem, leaf, and root; leaves spirally arranged on stem, of the microphyll type; sporangia borne on upper (adaxial) surface of leaves (sporophylls), one sporangium per sporophyll; vascular tissue basically forming a central core in stem (protostelic); homosporous or heterosporous; ligulate (having basal, leaflike … rit building 77
The Cycad Society, Inc. - Illustrated Glossary of Cycad Terms
http://pza.sanbi.org/encephalartos-lebomboensis Web4 Mar 2024 · Cycas is called a living fossil. It has several characters common with the General structure The plant body is a sporophyte. It is differentiated into root, stem and … Web1 Sep 2003 · The leaf-like (pinnatifid) characteristics of a cycad sporophyll are evident in most Cycas species, where reduced, but distinct pinnae are present at the apex of the sporophyll ( Fig. 3c ). Such pinnae could be remnants of reduced pinnately compound leaves common in cycadeoids, seed ferns and ferns. smileys wochenanfang