alumroots

genus Heuchera

Member of alumroot tribe (tribe Heuchereae)
saxifrage family (family Saxifragaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

Except for historical records that I'm ignoring, there are no other wild species of this genus in the bay area.

crevice alumroot
Heuchera micrantha

crevice alumroot
Heuchera micrantha

hypanthium + calyx 1.5–3 mm
leaf blade 2–10 cm wide
common

Compare to oneleaf foamflower (Tiarella trifoliata var. unifoliata), which has a single inflorescence axis with only short forking offshoots.

island alumroot
Heuchera maxima

hypanthium + calyx 3.5–4.5 mm
leaf blade 6–18 cm wide
extremely rare at Coal Creek

1 observed taxon / 1 unobserved taxon / 1 key

Chris’s observations: 18 (12 are research grade)

Locations:

Sanborn CP: 5
Castle Rock SP: 3
Huckleberry Botanic RP: 2
Mt. Madonna SP: 2
Nisene Marks SP: 2
Bear Creek Redwoods OSP
Big Basin SP
Garin RP
Sam McDonald CP

Months:

Jan.: 2
Feb.: 1
Mar.: 0
Apr.: 1
May: 3
Jun.: 7
Jul.: 2
Aug.: 1
Sep.: 1

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora