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
    • Tonto 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
    • Symbiota Docs
    • Video Tutorials
    • Collections in SEINet
    • Joining a Portal
Petradoria pumila (Nutt.) Greene  
Family: Asteraceae
Grassy Rock-Goldenrod, more...rock goldenrod, grassy rockgoldenrod
[Chrysoma pumila Nutt.]
Petradoria pumila image
Max Licher
  • FNA
  • SW Field Guide
  • Resources
Lowell E. Urbatsch, Roland P. Roberts, Kurt M. Neubig in Flora of North America (vol. 20)
Stems 1-20+. Leaf blades 20-120 × 1-12 mm; cauline well developed, coriaceous, bases cuneate to attenuate, expanded laterally and abaxially, clasping, less so distally, apices acute to attenuate . Peduncles 1-5+ mm, glabrous or scabrous, resinous. Phyllaries mostly tan, 1-7 × 0.5-1+ mm, margins mostly entire, apices acute to attenuate (outer), obtuse to truncate, often mucronate (inner), a darker, thickened subapical gland often present. Ray florets 1-3, pistillate; corollas 4-8 mm, tubes 2-3.5 mm, laminae ± elliptic, 2.5-4.5 × 0.7-2.5 mm, lobes 0.5-1 mm; style branches 1-2 mm, linear-lanceolate, stigmatic lines extending around entire margin, appendages 0. Disc corollas 3.5-5.5 mm; style branches essentially lacking, stigmatic lines 0, appendages ± 1 mm, covered with collecting hairs. Cypselae of ray 4-5 mm; pappi 3.5-7 mm.
General: Perennial, 0.8-25 cm tall; stems 1-20, erect, slender, glabrous or minutely scabrous, often resinous; caudex woody, branched; tap-rooted. Leaves: Basal and cauline, alternate, oblanceolate to linear-oblanceolate, 2-12 cm long, 1-12 mm wide, gradually reduced upwards, leathery, faintly to conspicuously gland-dotted, resinous, margins minutely scabrous; basal and lower cauline blades petiolate, upper cauline blades sessile. Flowers: Heads solitary or few, arranged in corymb-like arrays; involucre campanulate, 3.5-5 mm long, and about as wide; phyllaries 12-16 in mostly 2 series; disk flowers only, 30-40, yellow to pale yellow; flowers June-October. Fruits: Achene, 4-5 mm long, glabrous, 6-9 veined; pappus of 30- 60 tan, minutely barbed bristles. Ecology: Dry, rocky, open habitats, slopes, canyons; 900-3000 m (3000-10000 ft); Apache, Coconino, Mohave, Navajo, and Yavapai counties; western and southwestern U.S. Notes: Two varieties occur in our region and are differentiated as follows: var. graminea has narrower (1-2 mm wide), 1- veined or sometimes 3-veined leaves, involucres are narrow (1.3-2 mm wide) with 1 ray flower, and 2-3 disk flowers; var. pumila has broader (2-12 mm wide), 3-5 veined leaves, involucres are somewhat wider (1.9-3 mm wide), with 2-3 ray flowers and 2-4 disk flowers. The Hopi use rock goldenrod as a remedy for breast pain and to dry up the flow of milk. The Navajo use it for ant bites and injuries and as a ceremonial emetic. Editor: Springer et al. 2008
Petradoria pumila
Open Interactive Map
Petradoria pumila image
Max Licher
Petradoria pumila image
Max Licher
Petradoria pumila image
Max Licher
Petradoria pumila image
Mary Barkworth
Petradoria pumila image
Liz Makings
Petradoria pumila image
Mary Barkworth
Petradoria pumila image
Gregory Gust
Petradoria pumila image
Gregory Gust
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
. Eastern Nevada Landscape Coalition
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Stephen Stern
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Petradoria pumila image
Click to Display
100 Initial Images
- - - - -
View All Images
The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
Powered by Symbiota