| Jepson eFlora: Key page |
| Vascular Plants of California
Key to families | Table of families and genera |
Key to Xanthium(For a list of species in Xanthium, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.
Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ] Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on . We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium. |
Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets).
Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped.
Narrowly elongate, widest in the basal half, often tapered to an acute tip.
Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf.
With stiff, straight, sharp, appressed hairs.
More or less equilaterally triangular, with the corners rounded or not.