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Vascular Plants of California
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Helichrysum petiolare

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: HelichrysumView Description 

Habit: [Annual to perennial herb] subshrub, shrub, often aromatic, taprooted. Stem: tomentose, generally stalked- or sessile-glandular. Leaf: cauline; alternate, [sessile] petioled, linear to ovate or spoon-shaped, tapered to truncate at base [clasping or decurrent], entire, faces 1-[or 2-] colored, generally gray- to white-tomentose or silvery hairy, sometimes stalked- or sessile-glandular. Inflorescence: heads [disciform or] discoid, in groups in +- flat-topped cyme-like clusters; involucre bell-shaped; phyllaries in 3--5[7] series, persistent, spreading in fruit, bases green, generally sessile-glandular distally, distally +- white [straw-colored, orange, +- red, or +- pink], opaque [or transparent], generally shiny; receptacle [flat to] convex, epaleate, smooth or with short scales. Pistillate Flower: 0 [to few, peripheral; corolla yellow, +- minutely lobed]. Disk Flower: 3--30[50+]; corolla generally yellow; anther base with bristle-like tail, tip lanceolate; style tips truncate, hair-tufted. Fruit: cylindric, smooth or 4--6-ribbed, glabrous, strigose, or papillate; pappus of barbed or plumose bristles in 1 series, deciduous, free or loosely clinging together at base.
Species In Genus: +- 600 species: mostly Old World, especially Madagascar and southern Africa. Etymology: (Greek: sun + gold, an ancient plant name)
eFlora Treatment Author: Guy L. Nesom
Reference: Nesom 2006 FNANM 19:425--426
Unabridged Reference: Hilliard & Leistner 1983 Fl Southern Afr 33 (pt 7, fasc. 2):200--202; Nesom 2006 FNANM 19:425--426
Helichrysum petiolare Hilliard & B.L. Burtt
Stem: <= 100+ cm, loosely branched, straggling or trailing, sometimes rooting at soil contact, loosely gray-tomentose. Leaf: blade 1--3.5 cm, ovate to +- round, base widely tapered to truncate or +- cordate, tip obtuse to +- acute, faces silvery green, tomentose. Inflorescence: heads discoid, many, in long-stalked rounded or flat-topped clusters; involucre 3--7 mm diam; phyllaries in +- 5 series, proximally appressed, green-centered with transparent margins, loosely tomentose, distally ascending to +- spreading, creamy white, glabrous, tips rounded; receptacle scales +- 0.8 mm, linear, dark brown in age. Disk Flower: 18--30, corolla +- 2.5 mm. Fruit: +- 1 mm, widely cylindric, 5-ribbed, glabrous; pappus 3--3.5 mm.
Ecology: Cult as ornamental, escaped into coastal scrub, forest; Elevation: < 200 m. Bioregional Distribution: CCo, SCo; Distribution Outside California: Europe; native to southern Africa. Flowering Time: Jul--Aug
Jepson eFlora Author: Guy L. Nesom
Reference: Nesom 2006 FNANM 19:425--426
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Weed listed by Cal-IPC

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Botanical illustration including Helichrysum petiolare

botanical illustration including Helichrysum petiolare


Citation for this treatment: Guy L. Nesom 2012, Helichrysum petiolare, in Jepson Flora Project (eds.) Jepson eFlora, /eflora/eflora_display.php?tid=77426, accessed on February 20, 2020.

Citation for the whole project: Jepson Flora Project (eds.) 2020, Jepson eFlora,, accessed on February 20, 2020.

No expert verified images found for Helichrysum petiolare.

Geographic subdivisions for Helichrysum petiolare:
CCo, SCo
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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.
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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 (fruiting time in some monocot genera).