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Loran M. Whitelock (April 21, 1930 - May 27, 2014) was an American botanist who specialized in Cycads, a prehistoric plant that once dominated the planet and is now somewhat rare and endangered. [1]
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.
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The seeds when mature measure about 5 cm (2.0 in) long by 4 cm (1.6 in) wide and are sheathed in a bright red sarcotesta. [4] [5] [6] It is reputed to be the tallest known species of cycad and it towers over other understorey vegetation, but rarely reaches the forest canopy. [6] [7]: 4
Lepidozamia peroffskyana is a palm-like cycad in the Cardboard Palm Family Zamiaceae. It is endemic to eastern Australia, primarily near the coast of New South Wales. The species is named after Count Peroffsky (1794-1857), benefactor of the St. Petersburg Botanical Garden.
Some cycads, such as this Macrozamia communis, produce seeds with a sarcotesta. The sarcotesta is a fleshy seedcoat, [1] a type of testa. Examples of seeds with a sarcotesta are pomegranate and some cycad seeds. The sarcotesta of pomegranate seeds consists of epidermal cells derived from the integument, and there are no arils on these seeds. [2]
Ceratozamia hildae, commonly known as the bamboo cycad, is a species of cycad in the family Zamiaceae that is endemic to Mexico. It is native to the Huasteca Potosina of Querétaro and San Luis Potosí, near the Santa Maria River. C. hildae inhabits deciduous oak woodlands at elevations of 850–1,300 m (2,790–4,270 ft).
A specimen of L. hopei is known as the tallest living cycad at 17.5 m tall. These cycads are generally unbranched, tall, and with persistent leaf bases. They are easily cultivated as ornamental plants and are relatively cold hardy; L. peroffskyana was first described by a specimen grown at Saint Petersburg Botanical Garden in 1857.