| 词条 | Flaveria oppositifolia |
| 释义 |
| image = | image_caption = | regnum = Plantae | unranked_divisio = Angiosperms | unranked_classis = Eudicots | unranked_ordo = Asterids | ordo = Asterales | familia = Asteraceae | genus = Flaveria | species = F. oppositifolia | binomial = Flaveria oppositifolia | binomial_authority = (DC.) Rydb. 1915 | synonyms_ref = [1] | synonyms = *Flaveria longifolia A.Gray
}}Flaveria oppositifolia is a rare Mexican plant species of yellowtops within the sunflower family. It has been found only in northeastern Mexico, from Tamaulipas west to Coahuila, south as far as Hidalgo and Aguascalientes.[2] Some sources report the species to be present in the State of Texas in the United States, but the Texas populations have been recognized as a distinct species, F. brownii.[2]Flaveria oppositifolia is an perennial herb up to {{convert|80|cm|in|round=0.5|abbr=on}} tall. Leaves are about {{convert|5|-|10|cm|in|round=0.5|abbr=on}} long, covered in short, soft hairs. One plant can produce numerous flower heads in a loose branching array. Each head contains 10-15 yellow disc flowers but no ray flowers.[3] References1. ^The Plant List, Flaveria oppositifolia (DC.) Rydb. 2. ^[https://www.biodiversitylibrary.org/page/28003104#page/619/mode/1up Powell, Albert Michael. 1979. Annals of the Missouri Botanical Garden 65(2): 611-613] description and commentary in English, distribution map on page 610, Flaveria brownii 3. ^1 [https://www.biodiversitylibrary.org/page/28003104#page/618/mode/1up Powell, Albert Michael. 1979. Annals of the Missouri Botanical Garden 65(2): 609-611] description and commentary in English, distribution map on page 610, Flaveria oppositifolia External links
4 : Flaveria|Endemic flora of Mexico|Plants described in 1836|Taxa named by Augustin Pyramus de Candolle |
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