Search results
Results From The WOW.Com Content Network
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 ...
Like other cycads, Z. integrifolia is dioecious, having male or female plants. The male cones are cylindrical, growing to 5–16 cm long; they are often clustered. The female cones are elongate-ovoid and grow to 5–19 cm long and 4–6 cm in diameter. [8] It produces reddish seed cones with a distinct acuminate tip.
Like other cycads, Z. pumila is dioecious, having male or female plants. The male cones are cylindrical, growing to 3–15 cm long; they are often clustered. The female cones are elongate-ovoid and grow to 6–15 cm long and 4–6 cm in diameter. Pollination is done by certain insects, namely the cycad weevil Rhopalotria slossoni.
Cones are usually brownish- or blackish-red and single with a dense layer of fine hair. Both male and female cones are produced. The female cone is egg-shaped and up to 40 cm (15.5 in) long and 20 cm (8 in) in diameter while the male cone is largely cylindrical narrowing towards the ends up to 40 cm (16 in) long and 12 cm (4.5 in) in diameter.
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.
The Natal cycad is dioecious, having male and female cones on separate plants. The male cones are velvety and about 45 by 11 cm (18 by 4 in) in size. Pollen is produced from April to June. The two or three female cones are slightly woolly, yellowish-green and cylindrical, 55 by 25 cm (22 by 10 in) in size, the scales being covered with small knobs.
The plants are dioecious, and the family Cycadaceae is unique among the cycads in not forming seed cones on female plants, but rather a group of leaf-like structures called megasporophylls each with seeds on the lower margins, and pollen cones or strobilus on male individuals. The caudex is cylindrical, surrounded by the persistent petiole ...
The male cycad develops 1 to 5 male cones, each cone measuring 12 cm to 28 cm in length and 4 cm to 7 cm in diameter. These cones are fusiform but curve with age and remain green throughout its lifetime. The female cycad develops 1 to 3 female cones, each cone measuring 25 cm to 40 cm in length and 10 cm to 15 cm in diameter. The female cone ...