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Vascular Plants of California
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Acamptopappus sphaerocephalus var. hirtellus

Higher Taxonomy
Family: Asteraceae (Compositae)View 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: AcamptopappusView DescriptionDichotomous Key

Habit: Subshrub, appearing glabrous. Stem: decumbent to erect, striate; old stems gray, bark sometimes shreddy with age; young stem proximally white, distally green. Leaf: simple, proximally sometimes in axillary clusters, spreading-ascending to appressed-erect, linear to oblong or narrowly oblanceolate, generally minutely stiff-pointed, pale green to light gray-green. Inflorescence: heads radiate or discoid, 1 or in rounded to +- flat-topped clusters, small in bud, expanding rapidly in fruit; involucre widely bell-shaped to +- spheric; phyllaries 20--24, graduated in 2--3 series, ovate to ovate-elliptic, bases cream-yellow, tips green, margins scarious; receptacle deeply pitted, with projections between flowers, epaleate. Ray Flower: present or 0; corolla yellow. Disk Flower: 14--80; corolla funnel-shaped, yellow, sinuses deep, lobes spreading to reflexed; anther tip acute; style tips lanceolate. Fruit: densely long-hairy, hairs white, bronze, or +- brown; pappus of 20--25 wide, stiff, wide-spreading bristle-like scales, slightly > fruit.
Species In Genus: 2 species: southwestern United States. Etymology: (Greek: unbending pappus)
eFlora Treatment Author: Guy L. Nesom & Meredith A. Lane
Reference: Nesom 2006 FNANM 20:184--185
Unabridged Reference: Lane 1988 Madroño 35:247--265
Species: Acamptopappus sphaerocephalusView Description 

Stem: much-branched, ascending to erect. Leaf: <= 1.5 cm, <= 3 mm wide, generally linear to oblanceolate. Inflorescence: heads generally in loose, rounded to flat-topped clusters; involucre hemispheric to spheric, 8--16 mm diam. Ray Flower: 0. Disk Flower: 13--27; corolla 2--3.5 mm. Fruit: <= 3 mm. Chromosomes: 2n=18.
Note: Varieties sometimes occur together and intergrade.
Acamptopappus sphaerocephalus var. hirtellus S.F. Blake
Stem: generally <= 6 dm. Leaf: Leaf faces densely rough-puberulent.
Ecology: Gravelly or rocky soils, flats or slopes, juniper woodland; Elevation: < 1750 m. Bioregional Distribution: Teh, SnGb, SnBr, PR, SNE, DMoj; Distribution Outside California: northwestern Arizona, southern Nevada. Flowering Time: Apr--Jun
Jepson eFlora Author: Guy L. Nesom & Meredith A. Lane
Reference: Nesom 2006 FNANM 20:184--185
Unabridged Reference: Lane 1988 Madroño 35:247--265
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Citation for this treatment: Guy L. Nesom & Meredith A. Lane 2012, Acamptopappus sphaerocephalus var. hirtellus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 16, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora,, accessed on September 16, 2019.

Acamptopappus sphaerocephalus var. hirtellus
click for enlargement
© 2003 James M. Andre
Acamptopappus sphaerocephalus var. hirtellus
click for enlargement
© 2012 James M. Andre

More photos of Acamptopappus sphaerocephalus var. hirtellus in CalPhotos

Geographic subdivisions for Acamptopappus sphaerocephalus var. hirtellus:
Teh, SnGb, SnBr, PR, SNE, DMoj
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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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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.