click photo for larger file
high resolution: ZOOM browser
view full size
Hypericum perforatum
Klamathweed
|
Photographer: Aaron Schusteff
ID: 0000 0000 0724 0268 (2024-07-10)Copyright © 2024 Aaron Schusteff
|
Related images:
another view:
|
|
INFORMATION PROVIDED WITH THE PHOTO
|
|
date of photo Jul 9, 2024
location
Along John Nicholas Trail south of Lake Ranch Reservoir (Santa Clara County, California, US)family
Hypericaceae
notes Back-lit view of the upper (adaxial) sides of leaves of Hypericum perforatum, showing translucent glands evenly distributed throughout the leaves and the somewhat blurry shadows of the tiny black glands (also called 'black nodules') positioned mainly along the margins of the lower (abaxial) sides of the leaves. The black nodules are also typically seen along the margins of the petals (e.g. see here). Two (rather technical) papers discussing some of the physiology & chemistry of these glands are Zobayed et al.(2006) and Ciccerelli et al.(2001). Black glands/nodules occur in members of Hypericum sect. Hypericum, which in addition to H. perforatum also includes the CA-native species H. concinnus and H. scouleri. photo category: Plant - annual/perennial
|
MORE INFORMATION ABOUT THIS PLANT
|
| common names
Klamathweed (photographer)
Look for Jepson Manual treatments, maps (University & Jepson Herbaria)View Calflora record for Hypericum perforatumView all photos in CalPhotos of Hypericum perforatum Check Google Images for Hypericum perforatum |
|
The photographer's identification Hypericum perforatum has not been reviewed. Sign in to review or comment on this photo |
|
Using this photo The thumbnail photo (128x192 pixels) on this page may be freely used for personal or academic purposes without prior permission under the Fair Use provisions of US copyright law as long as the photo is clearly credited with © 2024 Aaron Schusteff.
For other uses, or if you have questions, contact Aaron Schusteff arbonius2[AT]sbcglobal.net. (Replace the [AT] with the @ symbol before sending an email.) |
|
