Juncaginaceae

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Juncaginaceae
Triglochium palustris BotGartBln310505.JPG
Triglochin palustris
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Alismatales
Family: Juncaginaceae
Rich.[1]
Genera

Juncaginaceae is a family of flowering plants, recognized by most taxonomists for the past few decades. It is also known as the Arrowgrass family. It includes 3 genera with a total of 34 known species (Christenhusz & Byng 2016 [2]).

The APG II system, of 2003 (unchanged from the APG system, of 1998), also recognizes such a family and places it in the order Alismatales, in the clade monocots. The species are found in cold or temperate regions in both the Northern and Southern Hemisphere. However APG IV (2016) removed the genus Maundia due to its non-exclusive relationship, and elevated it to the monogeneric family Maundiaceae.

Description[edit]

Sea Arrowgrass Triglochin martima

Juncaginaceae are marsh or aquatic herbs with linear, sheathing basal leaves. The flowers are small and green in erect spikes or racemes. The flower parts come in threes, but the carpels are either 3 or 6, joined to a superior ovary. The fruit is a capsule.[3] Example arrowgrasses Triglochin include the Marsh Arrowgrass (Triglochin palustris), the Sea Arrowgrass (Triglochin maritima), and also other species like Triglochin trichophora, Triglochin striata and Triglochin mucronata.

Taxonomy[edit]

The Maundia genus was grouped within the Juncaginaceae family by the APG II. The newer APG III version (2009), though, suggested it may be necessary to split Maundia off into its own monogeneric family, Maundiaceae,[1] supported by the non-exclusive relationship of the genus to Juncaginaceae.[4] This was achieved in the APG IV (2016), leaving only four genera in Juncaginaceae.[5]

References[edit]

  1. ^ a b 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 2013-06-26. 
  2. ^ Christenhusz, M. J. M.; Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa (Magnolia Press) 261 (3): 201–217. doi:10.11646/phytotaxa.261.3.1. 
  3. ^ Rose, Francis (2006). The Wild Flower Key. Frederick Warne & Co. pp. 486–487. ISBN 978-0-7232-5175-0. 
  4. ^ Les & Tippery 2013.
  5. ^ APG IV 2016.

Bibliography[edit]

External links[edit]