Key to Hydrangeaceae
View taxon page for Hydrangeaceae
Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.
1. Flowers < 8 mm wide, odorless;
sepals 1.5–2 mm, ±
deciduous;
petals 3–6 mm
2. Leaf blade 
Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped.
8–16 mm, 3–6 mm wide;
fruit ±
cylindric 
Elongate, with parallel sides and, at any point, round in transverse section.
,
styles persistent; trunk or main
stem erect 
Upright; vertically oriented.
; W&I, DMtns
..... FENDLERELLA 2' Leaf blade 15–40 mm, 10–30 mm wide; fruit
spheric, styles deciduous; main stem
prostrate 
Lying flat on the ground.
; coastal mtns
..... WHIPPLEA 1' Flowers >= 10 mm wide, fragrant; sepals 3–10 mm, persistent; petals 5–25 mm
3. Stamens 10, alternating long and short;
filament base wide, flat;
stigma terminal, < 0.5 mm
..... JAMESIA 3' Stamens > 20, ± equal, filament base ±
linear 
Elongate, with nearly parallel sides; narrower than elliptic or oblong.
; stigma linear along
style branches, > 1 mm
4. Flowers 3–6 cm wide;
leaves 1-veined from base, persistent, leathery;
ovary ±
superior; petals ± round; c&s SNF (Fresno Co.)
..... CARPENTERIA 4' Flowers 1–3 cm wide; leaves 3-veined from base, deciduous; ovary 1/2 to completely
inferior; petals
oblong 
Longer than wide, with nearly parallel sides; wider than linear.
to
elliptic 
In the shape of a flattened circle or ellipse; wider than linear
..... PHILADELPHUS
Please use this Google Form for Contact/Feedback
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.
