buckthorns

genus Rhamnus

Member of buckthorn family (family Rhamnaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

There are no other wild species of this genus in the bay area.

redberry buckthorn
Rhamnus crocea

redberry buckthorn
Rhamnus crocea

4 sepals
red fruit
leaf blade 10–15 mm

flat

branches spreading

hollyleaf redberry
Rhamnus ilicifolia

hollyleaf redberry
Rhamnus ilicifolia

4 sepals
red fruit
leaf blade 20–40 mm

flat or concave abaxially (curled around the axis)

branches generally ascending

mediterranean buckthorn
Rhamnus alaternus

5 sepals
black fruit
leaf blade 20–60 mm
found only in cultivated or once-cultivated settings

2 observed taxons / 1 unobserved taxon / 1 key

Chris’s observations: 17 (8 are research grade)

Locations:

Almaden Quicksilver CP: 5
El Sereno OSP: 2
Picchetti Ranch OSP: 2
Pinnacles NP: 2
Rancho Cañada del Oro OSP: 2
Alum Rock Park, San Jose
Fremont Older OSP
Lexington Reservoir CP
Stevens Creek CP

Months:

Feb.: 1
Mar.: 1
Apr.: 1
May: 2
Jun.: 3
Jul.: 1
Aug.: 3
Sep.: 0
Oct.: 2
Nov.: 0
Dec.: 3

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora