| 词条 | Hemizonella |
| 释义 |
|name = Hemizonella |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |tribus=Madieae[1] |genus = Hemizonella |genus_authority = (A.Gray) A.Gray |species = H. minima |binomial = Hemizonella minima |binomial_authority =A.Gray |synonyms_ref=[1] |synonyms=
}}Hemizonella is a genus of North American plants in the tarweed tribe within the sunflower family.[2][3] The only known species is Hemizonella minima (opposite-leaved tarweed),[4] native to British Columbia, Washington, Oregon, California, Montana, Idaho, Nevada[5][6] The plant grows in many types of forest, scrub, and chaparral habitats, from mountains to deserts. It is found in the Sierra Nevada and Cascade Range, and Mojave Desert.[3] Hemizonella minima is a small annual herb producing a thin, fuzzy stem up to about {{convert|15|cm|in}} in maximum height. The pointed, hairy leaves are no more than {{convert|2.5|cm|in}} long. The inflorescence produces one or more tiny flower heads which are oblong or shaped like tops on close inspection. Each is a few millimeters wide, enclosed in phyllaries studded with stalked resin glands, and tipped with minute yellowish florets. The fruit is an achene a few millimeters long with no pappus.[3]References1. ^Tropicos, Hemizonella (A. Gray) A. Gray {{Taxonbar|from=Q5712195}}{{Asteroideae-stub}}2. ^[https://www.biodiversitylibrary.org/page/5465525#page/197/mode/1up Gray, Asa. 1874. Proceedings of the American Academy of Arts and Sciences 9: 189] 3. ^1 2 Flora of North America Vol. 21 Page 296, Hemizonella (A. Gray) A. Gray 4. ^{{PLANTS|id=HEMI20|taxon=Hemizonella minima|accessdate=14 May 2015}} 5. ^1 Flann, C (ed) 2009+ Global Compositae Checklist 6. ^Hemizonella bonap 4 : Monotypic Asteraceae genera|Flora of British Columbia|Flora of the Western United States|Madieae |
| 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。