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Perityle emoryi

Higher Taxonomy
Family: AsteraceaeView DescriptionDichotomous Key

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; Bahia in Hymenothrix; 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 Picradeniopsis; Trimorpha in Erigeron; Venidium in Arctotis; Whitneya in Arnica. Amauriopsis in TJM2 (2012) treated here in Hymenothrix; Arida in Leucosyris; Bahia in Picradeniopsis.
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: PerityleView DescriptionDichotomous Key

Common Name: ROCK DAISY
Habit: Annual, perennial herb, subshrub, shrub. Leaf: opposite or alternate, simple to deeply divided or compound, sessile or petioled. Inflorescence: heads radiate, discoid or disciform, 1 or in cyme-like clusters; peduncle short or long; involucre cylindric, hemispheric, or bell-shaped; phyllaries in 2--3 +- equal series, linear to ovate; receptacle flat to conic, epaleate. Ray Flower: ray yellow or white. Disk Flower: 5--200; corolla yellow or white, 4-lobed; anther tips triangular; style tips tapered. Fruit: linear to oblanceolate, flat, sometimes weakly 3--4-angled; face dark brown or black, glabrous or puberulent, margins generally +- thick, puberulent to strongly ciliate; pappus 0 or a crown of fringed scales and 0--2 slender bristles.
Species In Genus: 66 species: southwestern North America, South America. Etymology: (Greek: around the margin, from thick fruit margin)
eFlora Treatment Author: David J. Keil
Reference: Yarborough & Powell 2006 FNANM 21:317--334

Perityle emoryi Torr.
Habit: Annual (rarely short-lived perennial herb) 2--60 cm, puberulent to rough-hairy and glandular. Stem: simple to much-branched. Leaf: generally alternate, petioled; blades 2--10 cm, ovate, round, or triangular, coarsely toothed to palmately lobed, teeth and lobes generally again toothed or lobed. Inflorescence: heads radiate (rarely disciform), 1--many; peduncle 0.1--7 cm; involucre hemispheric to bell-shaped; phyllaries many, 5--6 mm, lanceolate or oblanceolate to ovate. Ray Flower: generally 8--14; ray 1.5--4 mm, white, rarely vestigial. Disk Flower: corolla 2--2.5 mm, yellow. Fruit: generally 2--3 mm; margins thin, ciliate; ray fruit faces generally +- puberulent; disk fruit faces generally glabrous; pappus scales well developed or vestigial, bristle 0 or 1, 1--2.5 mm. Chromosomes: 2n=64--72, 100--116.
Ecology: Coastal scrub, creosote-bush scrub; Elevation: < 1300 m. Bioregional Distribution: SCo (uncommon), ChI, PR (uncommon), D; Distribution Outside California: to Utah, Arizona, northern Mexico; also western South America. Flowering Time: Jan--Jun, Oct--Nov
eFlora Treatment Author: David J. Keil
Reference: Yarborough & Powell 2006 FNANM 21:317--334
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botanical illustration including Perityle emoryi


Citation for this treatment: David J. Keil 2012, Perityle emoryi, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 17, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017, Jepson eFlora,, accessed on December 17, 2017.

Perityle emoryi
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© 2017 Neal Kramer
Perityle emoryi
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© 2017 California Academy of Sciences
Perityle emoryi
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© 1996 Christopher L. Christie
Perityle emoryi
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© 2016 Steve Matson
Perityle emoryi
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© 2011 Aaron E. Sims
Perityle emoryi
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© 2016 Steve Matson

More photos of Perityle emoryi in CalPhotos

Geographic subdivisions for Perityle emoryi:
SCo (uncommon), ChI, PR (uncommon), D;
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.
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.