Orobanchaceae

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Statistics of barcoding coverage:

Barcode of Life Data Systems (BOLD) Stats
Specimen Records:2630
Specimens with Sequences:3978
Specimens with Barcodes:2361
Species:726
Species With Barcodes:717
Public Records:2130
Public Species:642
Public BINs:0

Licensehttp://creativecommons.org/licenses/by/3.0/
Rights holder/AuthorSujeevan Ratnasingham, Paul D.N. Hebert, Barcode of Life Data Systems (BOLD)
Sourcehttp://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=121732

Barcode data:

Access Published & Released Data: Download FASTA File

Licensehttp://creativecommons.org/licenses/by/3.0/
Rights holder/AuthorSujeevan Ratnasingham, Paul D.N. Hebert, Barcode of Life Data Systems (BOLD)
Sourcehttp://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=121732

Orobanchaceae:

Orobanchaceae, the broomrapes, is a family of flowering plants of the order Lamiales, with about 90 genera and more than 2000 species. Many of these genera were formerly included in the family Scrophulariaceae sensu lato. Together they are a monophyletic group, forming a distinct family.

This is a cosmopolitan family, found mainly in temperate Eurasia, North America, South America, parts of Australia, New Zealand, and tropical Africa.

The Orobanchaceae are annual herbs or perennial herbs or shrubs, and all (except Lindenbergia and Rehmannia) are parasitic on the roots of other plants—either holoparasitic or hemiparasitic (fully or partly parasitic). The holoparasitic species lack chlorophyll and therefore cannot perform photosynthesis. They may be yellowish, brownish, purplish, or white. Their alternate leaves have been reduced to somewhat fleshy, sessile scales. The hemiparasitic species (transferred from Scrophulariaceae) are capable of photosynthesis, and may be either facultative or obligate parasites.

Parasitic plants are attached to their host by means of haustoria, which transfer nutrients from the host to the parasite. Only the hemiparasitic species possess an additional extensive root system. In most holoparasitic species there is a swollen mass of short, bulky roots or one big swollen haustorial organ, which may be simple or composite.

The hermaphroditic flowers are bilaterally symmetrical and grow either in racemes or spikes or singly at the apex of the slender stem. The tubular calyx is formed by 2–5 united sepals. There are five united, bilabiate petals forming the corolla. The upper lip is two-lobed, the lower lip is three-lobed. There are two long and two short stamens on slender filaments, inserted below the middle, or at the base of the corolla tube, alternating with the lobes of the tube. A fifth stamen is either sterile or lacking completely. The anthers dehisce via longitudinal slits. The pistil is one-celled. The ovary is superior. The flowers are pollinated by insects or birds (e.g. hummingbirds, as in Castilleja).

The fruit is a dehiscent, non-fleshy, 1-locular capsule with many very minute endospermic seeds. These are dispersed by the wind over long distances, which increases their chance of find a new host.

This family has tremendous economic importance because of the damage to crops caused by some species in the genera Orobanche and Striga. Some genera, especially Cistanche and Conopholis, are threatened by human activity, including habitat destruction and over-harvesting of both the plants and their hosts.


Cistanche phelypaea


Cistanche tubulosa


Bellardia trixago

Genera[edit]

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References[edit]

  1. ^ Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (PDF). Botanical Journal of the Linnean Society 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x. Retrieved 2013-07-06. 
Licensehttp://creativecommons.org/licenses/by-sa/3.0/
Rights holder/AuthorWikipedia
Sourcehttp://en.wikipedia.org/w/index.php?title=Orobanchaceae&oldid=654417782
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith