spikeweeds

genus Centromadia

Member of tarweeds and allies (tribe Madieae)
yellow daisies
sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

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

fitch’s tarweed
Centromadia fitchii

fitch’s tarweed
Centromadia fitchii

leaf densely coated with short hairs, stalked-glandular with yellow, brown, or black glands

pappose tarweed
Centromadia parryi

leaf glabrous or hairy, occasionally with sessile yellow glands

common spikeweed
Centromadia pungens ssp. pungens

common spikeweed
Centromadia pungens ssp. pungens

leaf faces often hairy, not glandular or minutely glandular

midrib often bristly
margins sometimes ciliate, at least near the base

2 observed taxons / 1 unobserved taxon / 1 key

Chris’s observations: 5 (3 are research grade)

Locations:

Coyote Hills RP: 2
Joseph D. Grant CP
Santa Teresa CP
Skyline Ridge OSP

Months:

Jul.: 2
Aug.: 0
Sep.: 1
Oct.: 1
Nov.: 0
Dec.: 1

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora