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For one, both male and female cycads are gymnosperms and bear cones (strobili), while palms are angiosperms and so flower and bear fruit. The mature foliage looks very similar between both groups, but the young emerging leaves of a cycad resemble a fiddlehead fern before they unfold and take their place in the rosette, while the leaves of palms ...
The pollen of this cycad is not airborne. Typically, the pollen is transported by a host-specific insect from male to female cones when they are receptive. [6] Pollen of L. peroffskyana is carried by Tranes group weevils. The weevil's life-cycle occurs in the male cones, but many individuals visit female cones during their lives, covered in pollen.
A labeled diagram of the human pelvis, created from a photograph I took of a model in a university anatomy lab. Traced and rendered using Inkscape 0.44.1: Date: 15 December 2006 (original upload date) Source: Transferred from to Commons. Author: Je at uwo at English Wikipedia: Other versions: Derivative works of this file: Pelvis diagram es.png
The endosperm is haploid, derived from the female gametophyte. The embryo is straight, with two cotyledons that are usually united at the tips and a very long, spirally twisted suspensor. The sperm of members from the genus are large, as is typical of cycads, and Z. roezlii is an example; its sperm are approximately 0.4 mm long and can be seen ...
The cones are sexually dimorphic: the male cone is a 40 to 50 cm long cylinder that is 7 to 10 cm wide with a peduncle that is up to 2 to 3 cm long; the female cone is 25 to 50 cm long, 20 to 25 cm wide, and sessile. Males can have up to ten cones at one time and females can have up to five cones at one time. [3]
Encephalartos lehmannii is a low-growing palm-like cycad in the family Zamiaceae.It is commonly known as the Karoo cycad and is endemic to South Africa. [3] The species name lehmannii commemorates Prof J.G.C. Lehmann, a German botanist who studied the cycads and published a book on them in 1834. [3]
This listing contains taxa of plants in the division Cycadophyta, recorded from South Africa. Cycads / ˈ s aɪ k æ d z / are seed plants with a very long fossil history that were formerly more abundant and more diverse than they are today. They typically have a stout and woody trunk with a crown of large, hard and stiff, evergreen leaves.
Encephalartos horridus, the Eastern Cape blue cycad, [3] is a small, low-growing cycad up to 0.9 m (3.0 ft) high and 0.9 m (3.0 ft) wide. [4] It is a native of Eastern Cape Province , South Africa , and found in arid shrublands, most commonly on ridges and slopes with shallow soils.