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单词 gymnosperm
释义
gymnosperm
(once / 87551 pages)
n

WORD FAMILY
gymnosperm: gymnosperms
USAGE EXAMPLES
They acted, Dr Labandeira thinks, as pollinators for the gymnosperm trees that preceded modern angiosperms, now the food plants of real butterflies.
Economist(Feb 04, 2016)
Like cycads — their gymnosperm relatives — and ferns, the ginkgo produces motile sperm.
New York Times(Oct 29, 2015)
The Gymnosperms, the naked seed plants that include ferns and conifers, make seeds only -- no fruit.
Scientific American(Sep 08, 2015)
n plants of the class Gymnospermae having seeds not enclosed in an ovary
Hypo|Hyper
progymnosperm
an ancestral fossil type from which modern gymnosperms are thought to have derived
Welwitschia mirabilis, welwitschia
curious plant of arid regions of southwestern Africa having a yard-high and yard-wide trunk like a turnip with a deep taproot and two large persistent woody straplike leaves growing from the base; living relic of a flora long disappeared; some may be 700-5000 years old
cycad
any tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves
pteridosperm, seed fern
an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae)
Cycas revoluta, sago palm
dwarf palmlike cycad of Japan that yields sago
zamia
any of various cycads of the genus Zamia; among the smallest and most verdant cycads
ceratozamia
a small cycad of the genus Ceratozamia having a short scaly woody trunk and fernlike foliage and woody cones; Mexico
dioon
any cycad of the genus Dioon; handsome palmlike cycads with robust crowns of leaves and rugged trunks
encephalartos
any of numerous cycads of the genus Encephalartos having stout cylindrical trunks and a terminal crown of long often spiny pinnate leaves
Encephalartos caffer, kaffir bread
South African cycad; the farinaceous pith of the fruit used as food
macrozamia
any treelike cycad of the genus Macrozamia having erect trunks and pinnate leaves and large cones with sometimes edible nuts; Australia
Macrozamia communis, Macrozamia spiralis, burrawong
large attractive palmlike evergreen cycad of New South Wales
phanerogam, seed plant, spermatophyte
plant that reproduces by means of seeds not spores
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