Xyris

Xyris

Taxobox
name = Xyridaceae
name = Xyridaceae


image_width = 260px
image_caption = "Xyris complanata" flower close-up
regnum = Plantae
divisio = Magnoliophyta
classis = Liliopsida
ordo = Poales
familia = Xyridaceae
genus = "Xyris"
genus_authority = L. [APNI | name = "Xyris" | id = 47738]
subdivision_ranks = species
subdivision = see text

"Xyris" is the botanical name of a genus of flowering plants in the Yellow-eyed-grass family. The genus counts over two hundred fifty species, with the center of distribution in the Guiana's.

The leaves are mostly distichous, linear, flat and thin or round with a conspicuous sheath at the base. They are arranged in a basal aggregation. The small, yellow flowers are dioecious, borne on a spherical or cylindrical spike or head (inflorescence). Each flower grows from the axil of a leathery bract. The fruit is a non-fleshy, dehiscent capsule. In "Xyris complanata" a single flower bud on the spike appears in the morning, and expands into a conspicuous flower during the afternoon hours.

The APG II system, of 2003, places the genus in family Xyridaceae, in to the order Poales in the clade commelinids, in the monocots.

References

External links

* [http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Tree&id=75440&lvl=3&lin=f&keep=1&srchmode=1&unlock NCBI Taxonomy Browser]
* [http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=135197 "Xyris" in the "Flora of North America"]


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Look at other dictionaries:

  • Xyris — Xy ris, n. [L., a kind of Iris, Gr. ?, fr. ? a razor.] (Bot.) A genus of endogenous herbs with grassy leaves and small yellow flowers in short, scaly bracted spikes; yellow eyed grass. There are about seventeen species in the Atlantic United… …   The Collaborative International Dictionary of English

  • Xyris — (X. L.), Pflanzengattung aus der Familie der Xyrideae, 3. Kl. 1. Ordn. L.; Arten: grasartig, in Australien, Madagascar, Nord u. Südamerika; der Saft von X. americana, in Cayenne, u. X. indica, in Ostindien, wird gegen Hautausschläge sehr gerühmt …   Pierer's Universal-Lexikon

  • Xyris —   Xyris Xyris complanata …   Wikipedia Español

  • Xyris — noun chiefly American marsh plants, having usually yellow flowers • Syn: ↑genus Xyris • Hypernyms: ↑monocot genus, ↑liliopsid genus • Member Holonyms: ↑Xyridaceae, ↑family Xyridaceae, ↑ …   Useful english dictionary

  • Xyris — ID 89322 Symbol Key XYRIS Common Name yelloweyed grass Family Xyridaceae Category Monocot Division Magnoliophyta US Nativity N/A US/NA Plant Yes State Distribution AL, AR, CT, DC, DE, FL, GA, HI, IA, IL, IN, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC …   USDA Plant Characteristics

  • Xyris L. — Symbol XYRIS Common Name yelloweyed grass Botanical Family Xyridaceae …   Scientific plant list

  • XYRIS LAXIFOLIA MART. - КСИРИС РЫХЛОЛИСТНАЯ — см. 164. Многолетнее растение. X. laxifolia Mart. К. рыхлолистная in Flora Bras. XXIV (1841), II Beibl 53. Correa (1926) 324, f. S у n. X. indica Vell.; X. communis Kunth. М е с т н. н а з в. Браз. botao de oure, herva de empiugem. P а с п р. Ю.… …   Справочник растений

  • Xyris andina — Taxobox status = CR | status system = IUCN3.1 regnum = Plantae divisio = Magnoliophyta classis = Liliopsida ordo = Commelinales familia = Xyridaceae genus = Xyris species = X. andina binomial = Xyris andina binomial authority = Malme synonyms =… …   Wikipedia

  • Xyris ambigua — ID 89323 Symbol Key XYAM Common Name coastal plain yelloweyed grass Family Xyridaceae Category Monocot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, FL, GA, LA, MS, NC, SC, TN, TX, VA Growth Habit… …   USDA Plant Characteristics

  • Xyris baldwiniana — ID 89324 Symbol Key XYBA Common Name Baldwin s yelloweyed grass Family Xyridaceae Category Monocot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, FL, GA, LA, MS, NC, SC, TX Growth Habit Forb/herb …   USDA Plant Characteristics

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