Identificaciones de fredwatson

Rancheria Clover (Trifolium albopurpureum) A.k.a. Indian Clover. Native, annual, hairy-all-over clover WITHOUT involucre, that grows in open grassland and wet meadows. Flower heads are small and cylindrical, woolly, purple with pale pink tip, borne on long peduncles. Peak bloom time: May.
Flowers per Jepson: "Flower: calyx 4--8 mm, lobes 3--6.5 mm, > tube, tapered or bristle-like, plumose; corolla 5--8 mm, <= calyx, 2-colored (purple and white)."

Jepson eFlora https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=47029

Calflora (with species distribution map in CA): https://www.calflora.org/app/taxon?crn=8043

Plants of Monterey County: an Illustrated Field Key, 2nd edition, Matthews and Mitchell, 2015, pp. 175-176.

Flora of Fort Ord: Monterey County, California, David Styer, 2019, p. 118.

Monterey County Wildflowers: a Field Guide, Yeager and Mitchell, 2016, p. 65.

Monterey County Wildflowers– a photographic guide https://montereywildflowers.com/fabaceae-clover-xinv/

Leaf Terminology: Simple Diagrams/Definitions: https://upload.wikimedia.org/wikipedia/commons/e/e8/Leaf_morphology.svg

Plant Identification Terminology: An Illustrated Glossary, 2nd ed., by James G. Harris and M. W. Harris, 2022.

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Trifolium (Clover) are in the Fabaceae (Pea) family. Trifolium has 3 leaflets per leaf and dense heads of small flowers. Clover are divided into 2 groups: those WITHOUT involucre and those WITH involucre (bracts at the base of the head which are fused to form a cup, bowl or wheel under the flower head).

David Styer regarding Trifolium: Fort Ord (National Monument), "which is roughly the size of San Francisco, has 33 species of wild Trifolium, 17 of which are native, and 5 of which are California endemics! . . ."
Flora of Fort Ord: Monterey County, California, David Styer, 2019, pp. 117-125.

Jepson eFlora Key to Trifolium: https://ucjeps.berkeley.edu/eflora/eflora_keys.php?key=10383
Jepson Taxon Page for Trifolium: https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=10383

Irene's "working notes" for Trifolium in CCo, using Jepson eFlora Filter Keys:
Trifolium (Clovers) is divided into 2 groups: those WITH involucre (bowl-shaped cup holding the flowers),
and those WITHOUT involucre.
In CCo (Central Coast of CA) Jepson filter key search lists the following 12 Trifolium species WITH Involucre:
Jepson eFlora https://keybase.rbg.vic.gov.au/keys/show/4182?filter_id=55b17b2b4727a

Trifolium barbigerum
Trifolium depauperatum var. truncatum
Trifolium hydrophilum
Trifolium microdon
Trifolium obtusiflorum
Trifolium polyodon
Trifolium trichocalyx
Trifolium variegatum var. geminiflorum
Trifolium variegatum var. major
Trifolium variegatum var. variegatum
Trifolium willdenovii
Trifolium wormskioldii

20 WITHOUT Involucre in CCo:
Trifolium albopurpureum
Trifolium amoenum
Trifolium angustifolium
Trifolium arvense
Trifolium bifidum var. bifidum
Trifolium bifidum var. decipiens
Trifolium campestre
Trifolium cernuum
Trifolium ciliolatum
Trifolium dubium
Trifolium glomeratum
Trifolium gracilentum
Trifolium hirtum
Trifolium incarnatum
Trifolium macraei
Trifolium pratense
Trifolium repens
Trifolium resupinatum
Trifolium striatum
Trifolium vesiculosum

Calflora lists the following 4 native Trifolium in Monterey County that has an affinity to SERPENTINE soils:
Trifolium gracilentum, Pin point clover
Trifolium fucatum, Bull clover
Trifolium microcephalum, Small-headed Clover
Trifolium willdenovii, Tomcat clover
Calfora https://www.calflora.org/entry/psearch.html?namesoup=trifolium&countylist=MNT&serpentine=t&plantcomm=any&format=photos&orderby=taxon