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Zamia
''Zamia'' is a genus of cycad of the family Zamiaceae, native to North America from the United States (in Georgia and Florida) throughout the West Indies, Central America, and South America as far south as Bolivia. The genus is considered to be the most ecologically and morphologically diverse of the cycads, and is estimated to have originated about 68.3 million years ago. Description The genus comprises deciduous shrubs with aerial or subterranean circular stems, often superficially resembling palms. They produce spirally arranged, pinnate leaves which are pubescent, at least when young, having branched and simple, transparent and coloured hairs. The articulated leaflets lack a midrib, and are broad with subparallel dichotomous venation. Lower leaflets are not reduced to spines, though the petioles often have prickles. The emerging leaves of many ''Zamia'' species are striking, some emerging with a reddish or bronze cast ('' Z. roezlii'' being an example). '' Z. picta'' is e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zamia Furfuracea04
''Zamia'' is a genus of cycad of the family Zamiaceae, native to North America from the United States (in Georgia and Florida) throughout the West Indies, Central America, and South America as far south as Bolivia. The genus is considered to be the most ecologically and morphologically diverse of the cycads, and is estimated to have originated about 68.3 million years ago. Description The genus comprises deciduous shrubs with aerial or subterranean circular stems, often superficially resembling palms. They produce spirally arranged, pinnate leaves which are pubescent, at least when young, having branched and simple, transparent and coloured hairs. The articulated leaflets lack a midrib, and are broad with subparallel dichotomous venation. Lower leaflets are not reduced to spines, though the petioles often have prickles. The emerging leaves of many ''Zamia'' species are striking, some emerging with a reddish or bronze cast ('' Z. roezlii'' being an example). '' Z. picta'' is even ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Zamia Species
''Zamia'' is a genus of cycads (non-flowering plants with seeds) found in the Neotropical Realm of the Americas. As of May 2025, there are about 90 species of ''Zamia'' recognized by major databases of plant species. A 2024 study analyzing transcriptomes from 77 species of ''Zamia'' found support for a phylogenetic tree of seven clades for the genus occupying different geographical ranges. Clade I includes species in the Caribbean islands and Florida. Clade II includes species in states along the Gulf Coast of central Mexico. Clade III, which is divided into the sub-clades III-A and III-B, includes species found in Mexico and northern Central America. Clade IV consists of a single species found in the Mexican state of Chiapas. Clade V includes species found in southern Central America. Clade VI includes species found in southernmost Panama and west of the Andes in South America. Clade VII consists species found in northern Colombia and east of the Andes in South America. Accepted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zamiaceae
The Zamiaceae are a family of cycads that are superficially palm or fern-like. They are divided into two subfamilies with eight genera and about 150 species in the tropical and subtropical regions of Africa, Australia and North and South America. The Zamiaceae, sometimes known as zamiads, are perennial, evergreen, and dioecious. They have subterranean to tall and erect, usually unbranched, cylindrical stems, and stems clad with persistent leaf bases (in Australian genera). Their leaves are simply pinnate, spirally arranged, and interspersed with cataphylls. The leaflets are sometimes dichotomously divided. The leaflets occur with several sub-parallel, dichotomously branching longitudinal veins; they lack a mid rib. Stomata occur either on both surfaces or undersurface only. Their roots have small secondary roots. The coralloid roots develop at the base of the stem at or below the soil surface. Male and female sporophylls are spirally aggregated into determinate cones that gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zamia Pumila
''Zamia pumila'', commonly known as guáyiga or guáyara in Spanish, is a small, tough, woody cycad native to the Greater Antilles. ''Z. pumila'' was the first species described for the genus and, therefore, is the type species for the genus ''Zamia'', the ''Zamia pumila'' species complex, and the family Zamiaceae. Description This cycad contains reddish seed cones with a distinct acuminate tip. The leaves are long, with 5-30 pairs of leaflets (pinnae). Each leaflet is linear to lanceolate or oblong-obovate, 8–25 cm long and 0.5–2 cm broad, with distinct teeth at the tip. They are often revolute, with prickly petioles. It is similar in many respects to '' Z. furfuracea'', but with slightly narrower leaflets, and to '' Z. integrifolia'' (with which it sometimes grouped), which differs in the more commonly entire (untoothed or only slightly so) leaflets. This is a low-growing plant, with trunk that grows to 3–25 cm high and diameter, but is often subterranea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zamia Furfuracea
''Zamia furfuracea'' is a species of cycad endemic to southeastern Veracruz state in eastern Mexico. Names Although not a palm tree (Arecaceae), its growth habit is superficially similar to a palm; therefore it is commonly known as cardboard palm. However, more correct would be cardboard cycad since it reflects the actually taxonomic classification of this species. Other names include cardboard plant, cardboard sago, Jamaican sago, and Mexican cycad. The plant's binomial name comes from the Latin ''zamia'', for "pine nut", and ''furfuracea'', meaning "mealy" or "scurfy". Description The plant has a short, sometimes subterranean trunk up to 20 cm broad and high, usually marked with scars from old leaf bases. It grows very slowly when young, but its growth accelerates after the trunk matures. Including the leaves, the whole plant typically grows to 1.3 m tall with a width of about 2 m. The leaves radiate from the center of the trunk; each leaf is 50–150 cm long with a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycad
Cycads are seed plants that typically have a stout and woody (ligneous) trunk (botany), trunk with a crown (botany), crown of large, hard, stiff, evergreen and (usually) pinnate leaves. The species are dioecious, that is, individual plants of a species are either male or female. Cycads vary in size from having trunks only a few centimeters to several meters tall. They typically grow slowly and have long lifespans. Because of their superficial resemblance to Arecaceae, palms or ferns, they are sometimes mistaken for them, but they are not closely related to either group. Cycads are gymnosperms (naked-seeded), meaning their fertilization, unfertilized seeds are open to the air to be directly fertilized by pollination, as contrasted with angiosperms, which have enclosed seeds with more complex fertilization arrangements. Cycads have very specialized pollinators, usually a specific beetle, and more rarely a thrips or a moth. Both male and female cycads bear cones (strobilus, stro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zamia Roezlii
''Zamia roezlii'' (chigua) is a species of cycad, a palm-like pachycaulous plant in the family Zamiaceae. It is found in Colombia (Choco, Nariño, Valle del Cauca, and Amazonas departments) and the Pacific coast of Ecuador. It is named for the Czech botanist Benedikt Roezl. A single sperm Sperm (: sperm or sperms) is the male reproductive Cell (biology), cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one). Animals produce motile sperm ... cell from ''Zamia roezlii'' is about 0.4mm in length and is visible to the unaided eye, being the world's largest plant sperm cell. '' Drosophila bifurca'', a species of fruit fly, has sperm that are 5.8cm long, albeit mostly coiled tail. The tree is up to 22 feet (seven meters) in height with fronds up to long bearing leaflets up to long and wide. References * https://web.archive.org/web/20101117213708/http://waynesword.palomar.edu:80/ww0601. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zamia Picta
''Zamia variegata'' is a species of plant in the family Zamiaceae. It is native to Belize, Guatemala, Honduras, and Mexico. It grows in forests. It is threatened by habitat destruction Habitat destruction (also termed habitat loss or habitat reduction) occurs when a natural habitat is no longer able to support its native species. The organisms once living there have either moved elsewhere, or are dead, leading to a decrease ..., which has likely reduced the population by about 50% over the last few decades. References Sources * variegata Endangered plants Taxonomy articles created by Polbot {{Cycad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arecaceae
The Arecaceae () is a family (biology), family of perennial plant, perennial, flowering plants in the Monocotyledon, monocot order Arecales. Their growth form can be climbing palm, climbers, shrubs, tree-like and stemless plants, all commonly known as palms. Those having a tree-like form are colloquially called palm trees. Currently, 181 Genus, genera with around 2,600 species are known, most of which are restricted to tropics, tropical and subtropics, subtropical climates. Most palms are distinguished by their large, compound, evergreen leaves, known as fronds, arranged at the top of an unbranched stem, except for the Hyphaene genus, who has branched palms. However, palms exhibit an enormous diversity in physical characteristics and inhabit nearly every type of Habitat (ecology), habitat within their range, from rainforests to deserts. Palms are among the best known and most extensively Horticulture, cultivated plant families. They have been important to humans throughout much ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichotomous Venation
A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, flower, and fruit collectively form the shoot system. In most leaves, the primary photosynthetic tissue is the palisade mesophyll and is located on the upper side of the blade or lamina of the leaf, but in some species, including the mature foliage of ''Eucalyptus'', palisade mesophyll is present on both sides and the leaves are said to be isobilateral. The leaf is an integral part of the stem system, and most leaves are flattened and have distinct upper (adaxial) and lower (abaxial) surfaces that differ in color, hairiness, the number of stomata (pores that intake and output gases), the amount and structure of epicuticular wax, and other features. Leaves are mostly green in color due to the presence of a compound called chlorophyll which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thorns, Spines, And Prickles
In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called ''spinose teeth'' or ''spinose apical processes''), are hard, rigid extensions or modifications of leaf, leaves, roots, plant stem, stems, or plant bud, buds with sharp, stiff ends, and generally serve the same function: physically plant defense against herbivory, defending plants against herbivory. Description In common language, the terms are used more or less interchangeably, but in botanical terms, thorns are derived from Shoot (botany), shoots (so that they may or may not be branched, they may or may not have leaves, and they may or may not arise from a bud),Simpson, M. G. 2010. "Plant Morphology". In: ''Plant Systematics, 2nd. edition''. Elsevier Academic Press. Chapter 9.Judd, Campbell, Kellogg, Stevens, Donoghue. 2007. "Structural and Biochemical Characters". In: ''Plant Systematics, a phylogenetic approach, third edition''. Chapter 4. spines are derived from Leaf, leaves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rachis
In biology, a rachis (from the [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this case the ''rachis'' usually forms the supporting axis of the body and is then called the spine or vertebral column. ''Rachis'' can also mean the central shaft of pennaceous feathers. In the gonad of the invertebrate nematode '' Caenorhabditis elegans'', a rachis is the central cell-free core or axis of the gonadal arm of both adult males and hermaphrodites where the germ cells have achieved pachytene and are attached to the walls of the gonadal tube. The rachis is filled with cytoplasm. In botany In plants, a rachis is the main axis of a compound structure. It can be the main stem of a compound leaf, such as in '' Acacia'' or ferns, or the main, flower-bearing portion of an inflorescence In botany, an inflorescence is a group or cluster of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
