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Ephedraceae Dumort. Search in IPNISearch in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Analyse des Familles de Plantes 11, 12. 1829. (Anal. Fam. Pl.) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 9/23/2011)
Acceptance : Accepted
Project data     (Last Modified On 9/23/2011)
Notes:

One genus and 65 species mainly in subtropical regions of the northern and southern hemisphere.

     Some species contain the alkaloid ephedrine, used in medicine (Herba Ephedrae). All local species of Ephedra are browsed by goats and camels.

     Literature: Meyer C.A., Versuch einer Monographie der Gattung Ephedra, durch Abbildungen erlautert,Mém. Acad. Sci. Pétersb. 5: 35-108 (1846). Stapf O., Die Arten der Gattung Ephedra, Denkschr. Akad. Wiss. Math.-Nat. Kl. Wien56: 1-112 (1889). Riedl H., Ephedraceae, in: Rech. f., Fl. Iranica3: 1-8 (1963). Freitag H. & Maier-Stolte M., The Ephedra species of Forsskaol, identity and typification, Taxon 38: 545-556 (1989).


 

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Mostly dioecious, much branched, erect or climbing shrubs. Branches usually green. Leaves opposite or whorled, often reduced to membranous sheaths. Reproductive organs axillary, opposite or arranged in whorls of 3 or 4 cones, each cone composed of 2-8 decussate pairs of bracts, the lower pair (or pairs) sterile, the others fertile. Staminate flowers of 2 opposite scales (perianth) subtending the single column of stamens; anthers 2-8, at end of column, sessile or stalked, each with 2-3 pollen sacs dehiscing by a terminal pore. Ovulate flowers in groups of 1-3, each consisting of 2-4 connate bracts (perianth) and an ovule with 2 pairs of bracts forming the outer and inner integuments, the latter terminating in an elongated style-like micropyle (micropylar tubule). Seed enclosed in the leathery, winged or fleshy integuments; cotyledons 2.

 

 
 
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