| 词条 | Melica rigida |
| 释义 |
|image= |genus=Melica |species=rigida |authority=Cav. }}Melica rigida is a species of grass found in Argentina, Brazil (Santa Catarina, Rio Grande do Sul), and Uruguay.[1] DescriptionThe species is perennial with short rhizomes. It culms are erected and {{convert|20|-|75|cm}} long while the plant stem is smooth. The leaf-sheaths are scabrous, tubular, closed on one end and are glabrous on surface. The leaf-blades are flat, stiff, and are {{convert|3|–|9|cm}} long by {{convert|2|–|2.5|mm}} wide. They also have scabrous margins and surface, the later one of which is rough. The eciliate membrane have a ligule which is {{convert|0.5|–|5|mm}} long and have a pubescent surface. The panicle is open, linear, and is {{convert|6|–|20|cm}} long by {{convert|1|–|2|cm}} wide. The main panicle branches are appressed with scaberulous and dominant axis.[2] It spikelets are elliptic, solitary and are {{convert|8|–|11|mm}} long. Fertile spikelets have pedicels which are curved filiform, and scabrous. They also have 2 fertile florets which are diminished at the apex with its rhachilla internodes being scaberulous. The floret callus is pubescent and have hairs which are {{convert|0.1|–|0.3|mm}} long. The glumes are dissimilar and are keelless and membranous, with other features being different; Lower glume is obovate, {{convert|8|-|11|mm}} long with an obtuses apex, while the upper one is lanceolate, {{convert|4|–|6|mm}} long and have an acute apex.[2] Lemma have ciliated margins, scaberulous surface, acute apex with the hairs being {{convert|0.5|mm}} long. It fertile lemma is chartaceous, elliptic and is {{convert|5.5|–|8.5|mm}} long by {{convert|2|–|2.5|mm}} wide. The species' palea have ciliolated keels, smooth surface and dentated apex. Flowers are fleshy, oblong and truncate. They also grow together, {{convert|0.3|–|0.5|mm}} long, have 2 lodicules and 3 anthers, the later one of which are {{convert|1|-|1.5|mm}} long. Fruits are dark brown in colour, have caryopsis and additional pericarp. They also have linear hilum while their size is {{convert|2.5|–|3|mm}} long.[2] EcologyIn Brazil, the species is found growing in fields on the elevation of {{convert|1000|-|1200|m}}.[1] References1. ^1 {{cite journal|author=Smith, L.B.|author2=D.C. Wasshausen|author3=R.M. Klein|last-author-amp=yes|year=1981|title=Flora illustrada Catarinense, part 1. Graminease, Bambusa ate Chlrois|place=Itajaí, Santa Catarina, Brazil}} {{Taxonbar|from=Q14861073}}2. ^1 2 {{cite web|url=http://www.kew.org/data/grasses-db/www/imp06182.htm |author1=W.D. Clayton |author2=M. Vorontsova |author3=K.T. Harman |author4=H. Williamson |title=Melica rigida|publisher=GrassBase|work=The Board of Trustees, Royal Botanic Gardens|place=Kew|date=November 12, 2012|accessdate=June 29, 2013}} 4 : Melica|Flora of Argentina|Flora of Brazil|Flora of Uruguay |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。