California Native Plant Society
San Gabriel Mountains Chapter

Glendora Ridge Road, Spring 2013

See also the Glendora Ridge Road 2010 page.

Glendora Ridge Road is one of the best places to see spring wildflowers in southern Califronia. As a chapter, we last visited it in May 2010, so it was appropriate to visit it again in 2013. This was a much drier year than 2010, but nevertheless there was much to be seen.)

While the 2013 chapter was on June 1, two scouting trips occurred during the previous week. Most of the photos here are from the scouting trips.

Click here for a list of plants seen on the scouting trips and the official field trip.

In the following sections, click on the thumbnails to see higher-resolution images, 720 x 480 pixels.

A. Butterflies

What a joy to see so many butterflies. Most prevalent were the variable checkerspot and the lupine blue. They were feeding on almost every kind of flower, including the sedum, the yerba santa, and the yarrow.

California sister buterfly

Large white skipper butterfly

Common white butterfly

Variable checkerspot butterfly

Lupine blue butterfly

Variable checkerspot and blue lupine butterflies

Pale swallowtail butterfly

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B. Wildflowers

Chaparral yucca (Hesperoyucca whipplei)

Miner's lettuce (Claytonia, probably perfoliata)

Goldenback fern (Pentagramma triangularis)

Golden yarrow (Eriophyllum confertiflorum)

Slender sunflower (Helianthus gracilentus )

California thistle (Cirsium occidentale var. californicum)

Caterpillar phacelia (Phacelia ciculataria)

Coastal wood fern (Dryopteris arguta)

White sage (Salvia apiana)

Climbing bedstraw (Galium nattallii)

Blue larkspur (Delphinium patens)

Baby blue eyes (Nemophila menziesii)

Speakleaf mountain dandelion (Agoseris retrorsa)

Polypody fern (Polypodium californicum)

California buckwheat (Eriogonum fasciculatum)

Miniature lupine (Lupinus bicolor)

Prickly phlox (Linanthus californicum)

Scrub oak (Quercus sp.)

Heartleaf keckiella (Keckiella cordifolia)

Cardinal catchfly, Indian pnk (Silene laciniata)

Leafy daisy (Erigeron foliosus)

Morning glory (Calystegia microstegia)

Stinging lupine (Lupinus hirsutissimus)

Western jimsonweed (Datura wrightii)

Western jimsonweed (Datura wrightii)

Pitcher sage (Lepechinia fragrans)

Lanceleaf liveforever (Dudleya lanceolata)

Lanceleaf liveforever (Dudleya lanceolata)

Pale Chinese houses (Collinsia heterophylla)

Pale Chinese houses (Collinsia heterophylla)

False gilia (Allophyllum divaricatum)

Mexicali onion (Allium peninsulare)

Dudley's clarkia (Clarkia dudleyana)

Slender tarweed (Madi gracilis)

Grape soda lupine (Lupinus excubitus)

Burr chirvil (Anthriscus caucalis)

Martin's paintbrush (Castilleja applegatei ssp. martinii)

Martin's paintbrush (Castilleja applegatei ssp. martinii)

Deerbrush (Ceanothus integerrimus)

Sword fern (Pollystichum imbricans)

Wild sweet pea (Lathyrus vestitus)

Iron Mountain (L) and Mt. Baldy (R)

Broad leaved lotus (Hosackia crassifolia)

California bluebell (Phacelia minor)

Common phacelia (Phacelia distans)

Yellow throated phacelia (Phacelia brachyloba)

Stickleaf (Mentzelia micrantha)

Urn-flowered allumroot (Heuchera caespitosa)

Rockface of Pacific stonecrop (Sedum spathulifolium)

Pacific stonecrop (Sedum spathulifolium)

Pacific stonecrop (Sedum spathulifolium)

Lemmon's catchfly (Silene lemmonii)

Sticky monkeyflower (Mimulus aurantiacus)

Pussy paws (Calyptridium monandrum)

Globe gilia (Gilia capitata ssp. capitata)

Wide throated yellow monkeyflower (Mimulus brevipes)

Strigose lotus (Acmispon strigosus)

Splendid gilia (Saltugilia splendens)

Golden eardrops (Ehrendorferia chrysantha)

Sand spurry (Spurgularia sp.)

White snapdragon (Antirrhinum coulterianum)

Fairy poppy (Meconella denticulata)

Collarless poppy (Eschscholzia caespitosa)

Sticky cinquefoil (Drymocallis glandulosa)

Cliff aster (Malacothrix saxatilis var. tenuifolia)

Bigberry manzanita (Arctostaphylos glauca)

Elegant rockcress (Boechera sparsiflora)

Wild honeysuckle (Lonicera subspicata)

Whispering bells (Emmenanthe penduliflora var. penduliflora)

Woodland star (Lithophragma bolanderi)

Popcorn flower (Cryptantha sp.)

Pineapple weed Matricaria discoidea

Common yarrow (Achillea millefolium)

Hairy yerba santa (Eriodictyon trichocalyx)

Baby blue eyes among Pacific stonecrop

Looking westward along the ridge

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Thanks to Terry Keller for identification of butterflies.