genus Lessingia

Member of sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

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

yellow corolla

spring lessingia
Lessingia tenuis

spring lessingia
Lessingia tenuis

3–25 flowers
corolla yellow with purple-brown band inside

peripheral flowers may have pink or purplish corolla

glands on stem and phyllaries

cauline leaves generally glandless

phyllary tips ± purple

valley lessingia
Lessingia pectinata

15–30 flowers
corolla yellow with purple-brown band inside
glands on cauline leaves
phyllary tips generally green

san francisco lessingia
Lessingia germanorum

20–40 flowers
corolla yellow with purple-brown band inside
plant generally glandless (rarely with sparse glands on phyllaries)

all others have glands somewhere

valley vinegar weed
Lessingia glandulifera

10–30 flowers
corolla entirely yellow
generally with sessile glands on leaf margins, phyllary tips

lavender or white corolla

slenderstem lessingia
Lessingia nemaclada

3–10 flowers
corolla generally white (occasionally pale lavender) with darker tube
phyllaries generally hairless (rarely sparsely hairy)
cauline leaves with sunken glands (and occasionally sessile and/or stalked glands)

mount tamalpais lessingia
Lessingia micradenia

mount tamalpais lessingia
Lessingia micradenia

3–10 flowers
corolla white to pale lavender with darker tube
phyllaries generally hairless (rarely sparsely hairy)
cauline leaves glandless (occasionally with sparse stalked glands)

crystal springs lessingia
Lessingia arachnoidea

8–18 flowers
corolla pink to lavender with darker tube
phyllaries cobwebby tomentose
caulline leaves glandless
involucre 4–8 mm long

woollyhead lessingia
Lessingia hololeuca

10–20 flowers
corolla lavender with darker tube
phyllaries cobwebby tomentose
caulline leaves glandless
involucre 8–13 mm long

2 observed taxons / 7 unobserved taxons / 2 keys

Chris’s observations: 5 (4 are research grade)

Locations:

Máyyan 'Ooyákma Coyote Ridge OSP: 3
Calero CP
Stevens Creek CP

Months:

Jun.: 1
Jul.: 0
Aug.: 0
Sep.: 3
Oct.: 0
Nov.: 0
Dec.: 1

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora