| Jepson eFlora: Key page |
| Vascular Plants of California
Key to families | Table of families and genera |
Key to Ambrosia(For a list of species in Ambrosia, 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. |
Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped.
Elongate, with nearly parallel sides; narrower than elliptic or oblong.
1. A major expansion or bulge, such as on the margin of a leaf, sepal, or petal, or on the surface of an ovary. 2. The free tips of otherwise fused structures, such as sepals or petals; larger than teeth.
1. In Asteraceae, a scale-like bract that subtends an individual flower on the receptacle (equal to 'chaff scale' in TJM), absent in some genera, restricted to a ring separating ray and disk flowers in most tarweed species. 2. In Poaceae, the distal, generally smaller of two sheathing bracts subtending a flower, generally two-veined and -keeled and ensheathed by the lemma; with the lemma and flower, comprising the floret.
Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle.
Having a short-tapered, blunt tip or base, the sides convex or straight and converging at more than a right angle.
Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.).
With stiff, straight, sharp, appressed hairs.
Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal.
1. A dense, often spheric inflorescence of sessile or subsessile flowers.
Curving or angling upward from base, or about 30-60 degrees less than vertical or away from axis of attachment.
Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf.
Minutely hairy.
Without a petiole, peduncle, pedicel, or other kind of stalk.
Completing life cycle (germination through death) in more than two years or growing seasons, generally non-woody (at least above ground) to woody; includes perennial herbs as well as subshrubs to trees; the abbreviation 'per' only refers to perennial herb, not to the word 'perennial' alone.
Generally short, sometimes woody, more or less vertical stem of a perennial, at or beneath ground level.
Upright; vertically oriented.