| 词条 | Encephalartos laurentianus |
| 释义 |
|image = Encephalartos laurentianus, Jardín Botánico, Múnich, Alemania 2012-04-21, DD 02.JPG |status = NT |status_system = IUCN3.1 |status_ref = |genus = Encephalartos |species = laurentianus |authority = De Wild. |synonyms = }}Encephalartos laurentianus, commonly called the malele or Kwango giant cycad, is a species of cycad that is native to northern Angola and southern Congo (Zaire), mostly along the Kwango River.[1] It is the largest of all cycads, with multiple stems both upright and prostrate, each as much as {{convert|60|ft|m|abbr=off|sp=us|spell=in}} in length,[2] and bearing a rosette of massive once-pinnate fronds up to 25 feet (eight meters) in length, {{convert|40|in|cm|spell=in}} in width, and with a petiole or stalk up to {{convert|8|in|cm|spell=in}} thick where it joins the stem or trunk. Each stem can be up to {{convert|4|ft|cm|spell=in}} in thickness.[3][4][5] This is also said to be the fastest growing cycad, producing up to five "flushes" (rosettes, or clusters) of leaves each year.[6] References1. ^{{cite web|url=http://www.tropicos.org/Name/9600109|title= Encephalartos laurentianus in Tropicos}} 2. ^http://www.cycadpalm.com/enlaplkwgicy.html 3. ^ANNALES DU MUSEE DU CONGO Series 6 FLORE Vol. 1 (1904) p. 10. 4. ^KEW BULLETIN Vol. 12 # 2 (1957) pp. 248-249. 5. ^Douglas Goode, CYCADS OF AFRICA (Cape Town: Struik-Winchester, 1989) p. 240. 6. ^{{cite web | url= http://willowbrooknursery.com/Encephalartos-laurentianus.html | title= E. laurentianus | last= External links
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