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| | Summary APG II (Site not responding. Last check: 2007-09-17) |
 | | Ephedraceae are rather small, shrubby, much-branched, xeromorphic plants that may be readily recognised by their green, photosynthetic stems, often reduced opposite leaves and small cones borne along the shoots. |
 | | Gnetaceae + Welwitschiaceae: torus:margo pits 0; branched sclereids +; stomata syndetocheilic; male gametophyte with one prothallial cell but no sterile cell; megaspores tetrasporic, no archegonia per se, alveolation does not occur; some cells of embryonal mass elongate, embryo cellular, with lateral "feeder" [protrusion of the hypocotylar axis]. |
 | | Gnetales are woody, evergreen plants with opposite, angiosperm-like leaves whose bases surround the stem; axillary to the leaves are a series of strobili. |
| www.mobot.org /MOBOT/Research/APweb/top/summaryapg2new.htm (12744 words) |
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