font settings

Font Size: Large | Normal | Small
Font Face: Verdana | Geneva | Georgia

Wuzzup? ZipcodeZoo's creators have a new creation that you should see.
Click here to learn about Wuzzup.

Urticales

(Order)

Overview

[ Back to top ]

Urticales is a for what used to be an order of flowering plants. This order was recognized in many, perhaps even most, systems, with some variations in circumscription. Among these is the Cronquist system (1981), which placed the order in the subclass Hamamelidae [sic], as comprising :

In the APG II system (2003) the plants belonging to this order, often in new family circumscriptions, are placed in the order Rosales.

Photos

[ Back to top ]

Taxonomy

[ Back to top ]

The Order Urticales is further organized into finer groupings including:

Families

[ Back to top ]

Cannabaceae

[more]

Cecropiaceae

Cecropia is a of about 25 species of trees in the nettle family (Urticaceae). They are native to the tropical Americas, where they form one of the most recognisable components of the rainforest. The genus is named after Cecrops I, the mythical first king of Athens. A common local name is yarumo or yagrumo, or more specifically yagrumo hembra ("female yagrumo") to distinguish them from the similar-looking but unrelated Schefflera (which are called yagrumo macho, "male yagrumo"). In English, these trees are occasionally called pumpwoods (though this may also refer to C. schreberiana specifically) or simply cecropias. [more]

Moraceae

Trees, shrubs, vines, or rarely herbs, frequently with milky or watery latex, sometimes spiny. Stipules present, frequently caducous. Leaves alternate, rarely opposite; petiole often present and well-defined; leaf blade simple, sometimes with cystoliths, margin entire or palmately lobed, venation pinnate or palmate. Inflorescences axillary, frequently paired, racemose, spicate, capitate, or rarely cymose, sometimes a fig or syconium with flowers completely enclosed within a hollow receptacle. Flowers unisexual (plants monoecious or dioecious), small to very small. Calyx lobes (1 or) 2-4(-8), free or connate, imbricate or valvate. Corolla absent. Male flowers: stamens as many as and opposite to calyx lobes (except in Artocarpus), straight or inflexed in bud; anthers 1- or 2-loculed, crescent-shaped to top-shaped; pistillode (rudimentary sterile pistil) often present. Female flowers: calyx lobes usually 4; ovary superior, semi-inferior, or inferior, 1(or 2) -loculed; ovules 1 per locule, anatropous or campylotropous; style branches 1 or 2; stigmas usually filiform. Fruit usually a drupe, rarely an achene, enveloped by an enlarged calyx and/or immersed in a fleshy receptacle, often joined into a syncarp. Seed solitary; endosperm present or absent.[1] [more]

Ulmaceae

Trees or shrubs, evergreen or deciduous. Winter buds with scales, rarely naked; axillary buds developed; terminal bud usually dying back early. Stipules usually membranous, caducous. Leaves simple, alternate or rarely opposite, usually distichous, petiolate; leaf blade pinnately veined, basally 3(or 5) -veined, margin entire or serrate. Inflorescences axillary. Flowers monochlamydeous, bisexual, or rarely unisexual or polygamous. Perianth lobes 4-9, imbricate or rarely valvate, persistent or caducous. Stamens usually equal in number to and opposite perianth lobes, opposite, basally adnate to tepals; filaments distinct; anthers 2-celled, longitudinally fissured. Pistil 2-carpellate; ovary superior, 1(or 2) -loculed; ovule 1, suspended, anatropous; integuments 2. Style very short; stigmas 2, linear. Fruit samara, drupes, or winged nutlets, apically usually with persistent stigmas. Endosperm scanty or absent; embryo erect, curved, or involute; cotyledons flat, curved, or flexed. Seedling epigeous.[2] [more]

Urticaceae

Herbs, subshrubs, or shrubs, rarely trees, very rarely climbing, stems often fibrous, sometimes succulent. sometimes armed with stinging hairs; epidermal cells of leaves, sometimes stems, perianths mostly with prominent cystoliths punctiform to linear; Leaves alternate or opposite, stipules present, rarely absent; leaf blade simple. Inflorescences cymose, paniculate, racemose, spicate, or cluster-capitate, usually formed from glomerules, sometimes crowded on common enlarged cuplike or discoid receptacle, rarely reduced into a single flower. Flowers unisexual (plants monoecious or dioecious), rarely bisexual in partial flowers; actinomorphic, very small, (1-) 4- or 5-merous, rarely perianth absent in female flowers. Calyx absent. Perianth lobes imbricate or valvate. Male flowers: stamens as many as and opposite to perianth lobes, filaments inflexed in bud; anthers 2-locular, opening lengthwise, rudimentary ovary often present. Female flowers: perianth lobes free or connate, usually enlarged in fruit and persistent, occasionally absent; staminodes scarious, opposite to the perianth lobes, or absent. Ovary rudimentary in male flowers, sessile or shortly stipitate, free or adnate to the perianth; 1-locular, ovule solitary, erect from the base; style simple, or absent; stigma diverse, capitate, penicillate-capitate (brushlike), subulate, filiform, ligulate, or peltate. Fruit usually a dry achene, sometimes a fleshy drupe, often enclosed by the persistent perianth. Seed solitary, endosperm usually present; embryo straight; cotyledons ovate elliptical or orbicular.[3] [more]

At least 4,278 species and subspecies belong to the Family Urticaceae.

More info about the Family Urticaceae may be found here.

Bibliography

[ Back to top ]

Footnotes

[ Back to top ]
  1. Zhengyi Wu, Zhe-Kun Zhou & Michael G. Gilbert "Moraceae". in Flora of China Vol. 5 Page 21. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
  2. Liguo Fu, Yiqun Xin & Alan Whittemore "Ulmaceae". in Flora of China Vol. 5 Page 1. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
  3. Jiarui Chen, Prof. Qi Lin, Ib Friis, C. Melanie Wilmot-Dear & Alex K. Monro "Urticaceae". in Flora of China Vol. 5 Page 76. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.

Sources

[ Back to top ]
Last Revised: April 26, 2010
2010/04/26 09:17:47