• NSF NEON | Open Data to Understand our Ecosystems
  • Biorepository Data Portal

  • Home
  • Search
    • Sample search
    • Map search
    • Dynamic Species List
    • Taxonomic Explorer
  • Images
    • Image Browser
    • Image Search
  • Datasets
    • Research Datasets and Special Collections
    • Carabidae Checklists with Keys
    • Mosquito Checklists with Keys
    • Checklist: Research Sites - Invertebrates
    • Checklist: Research Sites - Plants
    • Checklist: Research Sites - Vertebrates
  • Sample Use
    • Sample Use Policy
    • Sample Request
    • Sample Archival Request
    • Dataset Publishing
  • How to Cite
  • Additional Information
    • Tutorials and Help
    • Biorepository Staff
    • About NEON
    • NEON Data Portal
    • ASU Biocollections
    • About Symbiota
  • Getting Started
Login New Account Sitemap
Arabis georgiana Harper  

No occurrences found

Family: Brassicaceae
Georgia rockcress
Images
not available
  • FNA
  • Resources
Ihsan A. Al-Shehbaz in Flora of North America (vol. 7)
Biennials; sparsely to moderately hirsute (at least basally), trichomes simple, mixed with fewer, short-stalked, forked ones, subsessile cruciform or 3-rayed stellate trichomes commonly on abaxial blade surfaces, sometimes plants glabrous distally. Stems simple or few from base (rosette), erect, unbranched or branched (few) distally, 3-7 dm, (hirsute basally, glabrous distally). Basal leaves: petiole 0.5-2 cm, (ciliate or not); blade spatulate, oblanceolate, or obovate, 1.5-6 cm × 5-15 mm, margins dentate, apex obtuse or acute, abaxial surface moderately to sparsely pubescent, trichomes subsessile stellate, adaxial surface subglabrate or sparsely stellate. Cauline leaves 7-26; blade oblong, lanceolate, or linear-lanceolate, 1.5-7 cm × 3-18 mm, base auriculate to subamplexicaul, margins dentate or entire, apex acute or obtuse, pubescent as basal leaves except distalmost leaves often glabrous. Racemes often simple. Fruiting pedicels erect to erect-ascending, 7-16 mm, (glabrous). Flowers: sepals oblong, 2.5-4.5 × 1-1.5 mm, lateral pair subsaccate basally; petals white, narrowly spatulate or oblanceolate, 6-9 × 1-1.5 mm, apex obtuse; filaments 3-4.5 mm; anthers oblong, 0.8-1 mm. Fruits erect to erect-ascending, (often subappressed to rachis), smooth, 4-7 cm × 0.7-0.8 mm; valves each with midvein extending full length or to middle; ovules 38-44 per ovary; style 0.7-1.8 mm. Seeds narrowly winged throughout, oblong, 0.9-1.9 × 0.5-0.7 mm; wing to 0.1 mm wide distally. Flowering Mar-Apr. Stream banks, roadsides; of conservation concern; 0-200 m; Ala., Ga. Arabis georgiana is most closely related to A. pycnocarpa, from which it is easily distinguished by having narrower fruits, longer petals, and subsessile cruciform or 3-rayed trichomes on abaxial surfaces of basal leaves. It is known only in Alabama from Bibb and Elmore counties and in Georgia from Stewart County.

Click to Display
0 Total Images
NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.