Log In New Account Sitemap
  • Home
  • Specimen Search
    • Search Collections
    • Map Search
    • Exsiccati Search
  • Images
    • Image Browser
    • Search Images
  • Flora Projects
    • Arizona
    • New Mexico
    • Colorado Plateau
    • Plant Atlas of Arizona (PAPAZ)
    • Sonoran Desert
    • Teaching Checklists
  • Agency Floras
    • NPS - Intermountain
    • USFWS - Region 2
    • BLM Flora
    • Coronado NF
  • Dynamic Floras
    • Dynamic Checklist
    • Dynamic Key
  • Additional Websites
    • New Mexico Flores
    • Plant Atlas Project of Arizona (PAPAZ)
    • Southwest Colorado Wildflowers
    • Vascular Plants of the Gila Wilderness
    • Consortium of Midwest Herbaria
    • Consortium of Southern Rocky Mountain Herbaria
    • Intermountain Region Herbaria Network (IRHN)
    • Mid-Atlantic Herbaria
    • North American Network of Small Herbaria (NANSH)
    • Northern Great Plains Herbaria
    • Red de Herbarios del Noroeste de México (northern Mexico)
    • SERNEC - Southeastern USA
    • Texas Oklahoma Regional Consortium of Herbaria (TORCH)
  • Resources
    • Help
    • Webinars
    • Joining a Symbiota Portal
Symphyotrichum laurentianum (Fernald) G.L. Nesom  
Go To Encyclopedia of Life...
Family: Asteraceae
Gulf-of-St. Lawrence American-Aster
[Aster laurentianus var. contiguus]
Symphyotrichum laurentianum image
  • FNA
  • Web Links
Luc Brouillet, John C. Semple, Geraldine A. Allen, Kenton L. Chambers, Scott D. Sundberg+ in Flora of North America (vol. 20)
Annuals, 1-13+ cm. Stems 1, de­cum­bent to erect (straight), gla­brous. Leaves ± fleshy, margins entire, eciliate, apices obtuse, faces glabrous; basal deciduous at bolting, petiolate, blades oblanceolate 44-50 × 5-7 mm [cult.], bases attenuate; proximal cauline and some distal withering by flowering; cauline sessile, blades linear-lanceolate to spatulate, 15-55 × 1-4 mm, reduced distally, bases cuneate; distal sessile, blades linear-lanceolate to spatulate. Heads (disciform) in ± densely paniculiform arrays. Peduncles glabrous, bracts linear. Involucres campanulate, 5-8+mm. Phyllaries in 3-4 series, lanceolate, subequal, bases scarious, margins eciliate, green zones foliaceous (outer), apices obtuse, faces glabrous. Ray florets 0. Pistillate florets 14-47+ in 2-3+ series; laminae 0 (corolla tubes 2-2.4 mm, shorter than style branches). Disc florets 5-8+; corollas yellow, 3.1-3.9 mm, lobes deltate to triangular, 0.2-0.3 mm. Cypselae purple, obovoid, ± compressed, 2.8-2.9 mm, 2-4-nerved, faces strigillose; pappi white to yellowish white, 4.8-5.2 mm. 2n = 14. Flowering Aug-Sep. Brackish sand and mud, intertidal salt marshes, moist dune slacks; of conservation concern; 0 m; N.B., P.E.I., Que. Symphyotrichum laurentianum is known only from the southern shores of the Gulf of St. Lawrence.

  • Encyclopedia of Life
  • W3Tropicos
  • USDA PLANTS Database
  • Flora of North America
  • International Plant Names Index
  • Google Search Engine
  • Google Images
  • BOLD Systems - Barcode of Life Data Systems
  • Global Biotic Interactions (GloBI)
  • NCBI - National Center for Biotechnology Information
Symphyotrichum laurentianum
Open Interactive Map
Symphyotrichum laurentianum image
Click to Display
2 Total Images
The National Science Foundation
Developments of SEINet, Symbiota, and associated specimen databases have been supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)