Xyris
Xyridaceae | |
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Xyris complanata flower close-up | |
Scientific classification | |
Kingdom: | Plantae |
(unranked): | Angiosperms |
(unranked): | Monocots |
(unranked): | Commelinids |
Order: | Poales |
Family: | Xyridaceae |
Genus: | Xyris L.[1] |
Synonyms[2] | |
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Xyris, the yelloweyed grasses, is a genus of flowering plants in the Yellow-eyed-grass family. The genus counts over two hundred fifty species, widespread over much of the world, with the center of distribution in the Guianas.[2][3][4]
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.[3]
The APG II system, of 2003, places the genus in family Xyridaceae, into the order Poales in the clade commelinids, in the monocots.
- Xyris andina Malme
- Xyris ambigua Beyrich ex Kunth
- Xyris arenicola
- Xyris asperula
- Xyris baldwiniana Schultes
- Xyris bayardii
- Xyris brevifolia Michaux
- Xyris bulbosa
- Xyris caroliniana Walter
- Xyris chapmanii
- Xyris communis
- Xyris complanata R.Br.
- Xyris decipiens N.E.Br.
- Xyris difformis Chapman
- Xyris drummondii Malme
- Xyris elliottii Chapman
- Xyris elongata Rudge
- Xyris exilis Doust & B.J.Conn
- Xyris fimbriata Elliott
- Xyris flabelliformis Chapman
- Xyris flexifolia R.Br.
- Xyris flexuosa
- Xyris floridana
- Xyris gracilis R.Br.
- Xyris gracillima F.Muell.
- Xyris inaequalis N.A.Wakef.
- Xyris indica L.
- Xyris indivisa N.A.Wakef.
- Xyris iridifolia
- Xyris isoetifolia Kral,
- Xyris jupicai Richard
- Xyris juncea R.Br.
- Xyris lacera R.Br.
- Xyris lanata R.Br.
- Xyris laxiflora F.Muell.
- Xyris laxifolia Martius
- Xyris longisepala Kral
- Xyris louisianica
- Xyris macrocephala
- Xyris marginata Rendle
- Xyris montana Ries
- Xyris muelleri Malme
- Xyris neglecta
- Xyris operculata Labill.
- Xyris pallescens
- Xyris panacea
- Xyris papillosa
- Xyris paradisiaca''
- Xyris pauciflora Willd.
- Xyris platylepis Chapman
- Xyris roycei N.A.Wakef.
- Xyris scabrifolia R. M. Harper,
- Xyris serotina Chapman
- Xyris smalliana Nash
- Xyris stricta Chapman,
- 'Xyris subalata
- Xyris tennesseensis Kral
- Xyris torta Smith
- Xyris ustulata L.A.Nilsson
References
- 1 2 "Xyris". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government, Canberra. Retrieved 2008-10-12.
- 1 2 Kew World Checklist of Selected Plant Families
- 1 2 3 "Xyris". Flora of North America. Retrieved 2008-10-12.
- ↑ Flora of China, Vol. 24 Page 4, 黄眼草属 huang yan cao shu, Xyris Linnaeus, Sp. Pl. 1: 42. 1753; Gen. Pl. ed. 5; 25, 1754.