| 词条 | Grindelia microcephala |
| 释义 |
| image = | regnum = Plantae | unranked_divisio = Angiosperms | unranked_classis = Eudicots | unranked_ordo = Asterids | ordo = Asterales | familia = Asteraceae | tribus = Astereae | genus = Grindelia | species = G. microcephala | binomial = Grindelia microcephala | binomial_authority = DC. 1836 not Rothr. 1850 | synonyms_ref = | synonyms = }}Grindelia microcephala, the littlehead gumweed,[1] is a North American species of flowering plants in the daisy family. It is native to the south-central United States, having been found only in the State of Texas.[2][3]Grindelia microcephala grows in rich bottom lands along streams. It is an annual herb up to {{convert|40|cm|in|abbr=on}} tall. The plant usually produces numerous flower heads in open, flat-topped arrays. Each head has 16-27 ray flowers, surrounding a large number of tiny disc flowers.[4] References1. ^{{PLANTS|id=GRMI|taxon=Grindelia microcephala|accessdate=18 July 2015}} {{Taxonbar|from=Q15551827}}{{Astereae-stub}}2. ^Biota of North America Program 2014 county distribution map 3. ^[https://www.biodiversitylibrary.org/page/13062647#page/71/mode/1up Nesom, G.L. 1990. Studies in the systematics of Mexican and Texan Grindelia (Asteraceae: Astereae. Phytologia 68(4): 303–332] distribution map on page 307 4. ^Flora of North America Grindelia microcephala de Candolle 1836 3 : Grindelia|Endemic flora of Texas|Plants described in 1836 |
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