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Crepis occidentalis subsp. costata

Higher Taxonomy
Family: Asteraceae (Compositae)View DescriptionDichotomous Key

Common Name: SUNFLOWER FAMILY
Habit: Annual to tree. Leaf: basal and/or cauline, alternate, opposite, rarely whorled, simple to 2+ × compound. Inflorescence: 1° inflorescence a head, resembling a flower, of several types (see below), 1--many in generally +- cyme-like cluster; each head generally with +- calyx-like involucre of 1--many series of phyllaries (involucre bracts); receptacle of head flat to conic or columnar, paleate (bearing paleae = receptacle bracts) or epaleate; flowers 1--many per head. Flower: bisexual, unisexual, or sterile, +- small, of several types (see below); calyx 0 or modified into +- persistent pappus of bristles, scales, and/or awns; corolla radial or bilateral (0), lobes generally (0)3--5; stamens 4--5, filaments generally free, generally fused to corolla at tube/throat junction, anthers generally fused into cylinder around style, anther base generally rounded or cordate (deeply sagittate or with tail-like appendages), tip (= flattened appendage) generally projecting beyond pollen sac; pistil 1, 2-carpeled, ovary inferior, 1-chambered, 1-seeded, placenta basal, style 1, tip generally +- 2-branched (except in some staminate disk flowers), branch tips truncate or generally bearing +- brush-like appendages; stigmas 2, generally on adaxial faces of style branches. Fruit: achene (also called a cypsela) (drupe in Chrysanthemoides), cylindric to ovoid, sometimes compressed, generally deciduous with pappus attached.
Genera In Family: +- 1500 genera, 23000 species: worldwide, many habitats. Note: Flower and head types differ in form and sexual condition. A disk flower has a generally radial corolla, with a cylindric tube, expanded throat, and generally 5 lobes. Disk flowers are generally bisexual and fertile but occasionally staminate with reduced ovaries. Discoid heads comprise only disk flowers. A radiant head is a variant of a discoid head, with peripheral disk flower corollas expanded, often bilateral. A ray flower corolla is bilateral, generally with a slender tube and flattened petal-like ray (single lip composed of generally 3 lobes). Ray flowers are generally pistillate or sterile (occasionally lacking styles). Radiate heads have peripheral ray flowers and central disk flowers. Disciform heads superficially resemble discoid heads, with pistillate or sterile flowers that lack rays, together with or separate from disk flowers. A ligulate flower is bisexual, with a bilateral, generally ephemeral corolla and 5-lobed ligule. Liguliflorous heads comprise only ligulate flowers. See glossary p. 31 for illustrations of family characteristics. Echinops sphaerocephalus L., Gaillardia aristata Pursh, Gaillardia pulchella Foug., Hymenothrix loomisii S.F. Blake, Tagetes erecta L., Thelesperma megapotamicum (Spreng.) Kuntze are waifs. Melampodium perfoliatum Kunth, historic urban waif. Ageratum conyzoides L., Guizotia abyssinica (L. f.) Cass., Santolina chamaecyparisus L., orth. var. are rare or uncommon escapes from cultivation. Dyssodia papposa, Ismelia carinata (Schousb.) Sch. Bip. [Chrysanthemum carinatum Schousb.], Mantisalca salmantica (L.) Briq. & Cavill. are historical or extirpated waifs in California. Inula helenium L. not documented in California. Taxa of Aster in TJM (1993) treated here in Almutaster, Eucephalus, Eurybia, Ionactis, Oreostemma, Sericocarpus, Symphyotrichum; Chamomilla in Matricaria; Cnicus in Centaurea; Conyza in Erigeron and Laennecia; Dugaldia in Hymenoxys; Erechtites in Senecio; Hymenoclea in Ambrosia; Lembertia in Monolopia; Osteospermum ecklonis in Dimorphotheca; Picris echioides in Helminthotheca; Prionopsis in Grindelia; Raillardiopsis in Anisocarpus and Carlquistia; Schkuhria multiflora in Bahia; Trimorpha in Erigeron; Venidium in Arctotis; Whitneya in Arnica. Taxa of Arida in TJM2 (2012) treated here in Leucosyris.
Unabridged Note: Largest family of vascular plants in California and of eudicots globally.
eFlora Treatment Author: David J. Keil, except as noted
Scientific Editor: David J. Keil, Bruce G. Baldwin.
Genus: CrepisView DescriptionDichotomous Key

Common Name: HAWKSBEARD
Habit: Annual to perennial herb from taproot, woody caudex, or creeping rhizome; sap milky. Stem: 1--20+, erect, <= 12 dm, simple or branched, glabrous to densely hairy, sometimes stalked-glandular. Leaf: basal or cauline, alternate, base narrowed, often winged, blade entire or toothed to pinnately lobed or divided. Inflorescence: heads liguliflorous, generally in cyme-like, flat-topped, or panicle-like clusters; phyllaries in 2 series, outer reduced, inner +- equal, abaxially glabrous or hairy, adaxially generally glabrous; receptacle flat to convex, epaleate, shallowly pitted. Flower: 5--100+; corolla generally yellow [orange, white, pink], generally glabrous; ligule readily withering. Fruit: +- cylindric or fusiform, distally +- tapered or beaked with +- distinct constriction, 10--20-ribbed, glabrous or minutely short-rough hairy; pappus of 80--150 soft, hair-like bristles.
Species In Genus: +- 200 species: especially northern hemisphere. Etymology: (Greek: slipper or sandal, perhaps for fruit) Note: Reports of Crepis rubra L. from Marin Co. not substantiated.
Unabridged Note: Sexual forms of native species are distinct but (except Crepis nana, Crepis runcinata) connected by many apomictic, asexually reproducing forms of hybrid origin that obscure boundaries. Many of these asexual forms were grouped into subspecies by Babcock and Stebbins (1947); however, it is doubtful that these will hold up under close taxonomic scrutiny.
eFlora Treatment Author: David Bogler
Species: Crepis occidentalisView Description 

Habit: Perennial herb from deep taproot; caudex woody. Stem: erect, stout, branched from base or middle, +- gray-tomentose and/or stalked-glandular. Leaf: basal and cauline; basal and proximal +- elliptic, pinnately lobed or dentate, lobes widely lanceolate, recurved, often dentate; faces gray-tomentose, +- stalked-glandular; cauline reduced distally on stem. Inflorescence: heads in loose flat-topped cluster; involucre 11--19 mm, cylindric; outer phyllaries 2--6 mm, linear to deltate; inner phyllaries 7--13 mm, lanceolate, acute, tomentose and occasionally with short, green or black gland-tipped hairs. Fruit: 6--10 mm, fusiform, light to dark brown, tip beakless, ribs 10--18; pappus dusky white. Chromosomes: 2n=22,33,44,55,66,77,88.
Note: Subspecies intergrade extensively. Highly variable; includes genes from most or all dry-land montane species.

Crepis occidentalis subsp. costata (A. Gray) Babc. & Stebbins
NATIVE
Stem: 8--40 cm, tomentose, +- stalked-glandular. Leaf: 5--20 cm, pinnately lobed, lobes dentate. Inflorescence: heads 15--30, peduncle stalked-glandular; inner phyllaries 7--8, stalked-glandular with at least a few large dark or black bristles. Flower: (10)12--14. Fruit: golden brown. Chromosomes: 2n=44.
Ecology: Rocky hillsides, oak/juniper woodland; Elevation: 1200--2500 m. Bioregional Distribution: CaRH, n SNH, MP; Distribution Outside California: to Canada, Montana, Colorado, Wyoming. Flowering Time: Jun--Jul
eFlora Treatment Author: David Bogler
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Citation for this treatment: David Bogler 2016. Crepis occidentalis subsp. costata, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=5969, accessed on July 25, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 25, 2016.


Crepis occidentalis subsp. costata
click for enlargement
© 2006 James M. Andre
Crepis occidentalis subsp. costata
click for enlargement
© 2006 James M. Andre

More photos of Crepis occidentalis subsp. costata in CalPhotos


Geographic subdivisions for Crepis occidentalis subsp. costata:
CaRH, n SNH, MP;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.