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Chrysothamnus viscidiflorus subsp. puberulus

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: ChrysothamnusView DescriptionDichotomous Key

Common Name: RABBITBRUSH
Habit: Subshrub or shrub. Stem: erect to spreading, often highly branched. Leaf: alternate, sessile, entire. Inflorescence: heads discoid, in +- dense cyme-like (raceme-like) clusters, peduncled or +- sessile; involucre generally obconic, cylindric, or hemispheric; phyllaries generally in 3--7 series in +- 5 vertical or spiral ranks, free, overlapping, often keeled, persistent; receptacle convex, pitted, epaleate. Flower: (2)5--6(40+); corolla yellow, lobes 0.5--2.3 mm, generally spreading; anther tips narrowly acute, length 2.5--5.3 × width; style branches long, slender. Fruit: obconic or elliptic to cylindric, 5--10 ridged, generally light brown; pappus of many white to +- brown bristles.
Species In Genus: 9 species: southwestern Canada, western United States. Etymology: (Greek: golden shrub) Note: Other species in TJM (1993) moved to Cuniculotinus, Ericameria.
eFlora Treatment Author: Lowell E. Urbatsch
Species: Chrysothamnus viscidiflorusView Description 

Common Name: YELLOW RABBITBRUSH
Habit: Shrub 1--15 dm; caudex branched. Stem: generally erect to spreading, brittle, glabrous to pubescent, green when young, becoming +- white. Leaf: 1--7.5 cm, 0.5--10 mm wide, thread-like or linear to oblong or (ob)lanceolate, 1--5-veined, flat or twisted, often wavy-margined, (+- gray-)green, +- sticky. Inflorescence: heads in flat-topped or rounded clusters; involucre 5--10 mm, generally cylindric to obconic; phyllaries generally +- lanceolate, in +- 5 vertical ranks, keeled, yellow-green, +- sticky, tips acute to obtuse or rounded. Flower: 3--5(14); corolla 3.5--7.5 mm; style branches exserted, appendage generally < stigma. Fruit: 3--5 mm, obconic, hairy; pappus +- = corolla. Chromosomes: 2n=18,36,54.
Note: Highly variable; 5 subspecies in western North America.

Chrysothamnus viscidiflorus subsp. puberulus (D.C. Eaton) H.M. Hall & Clem.
NATIVE
Habit: Plant gray-green, densely puberulent with spreading, conic hairs. Leaf: 1--4 cm, generally 1--2(4) mm wide, thread-like to +- oblanceolate, puberulent, 1(3)-veined. Inflorescence: involucre narrowly cylindric. Flower: generally 5 (4--7); corolla 4.5--6 mm. Chromosomes: 2n=18,36 (tetraploids larger, lower elevations).
Ecology: Sagebrush scrub, pinyon/juniper woodland, subalpine slopes; Elevation: 1500--3000 m. Bioregional Distribution: SN (e slope), SnBr, GB, DMtns; Distribution Outside California: to Oregon, southern Idaho, Utah, northern Arizona. Flowering Time: Jul--Oct
eFlora Treatment Author: Lowell E. Urbatsch
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Citation for this treatment: Lowell E. Urbatsch 2016. Chrysothamnus viscidiflorus subsp. puberulus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=5930, accessed on May 31, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 31, 2016.


Chrysothamnus viscidiflorus subsp. puberulus
click for enlargement
© 2013 Steve Matson
Chrysothamnus viscidiflorus subsp. puberulus
click for enlargement
© 2005 Steve Matson
Chrysothamnus viscidiflorus subsp. puberulus
click for enlargement
© 2005 Steve Matson
Chrysothamnus viscidiflorus subsp. puberulus
click for enlargement
© 2013 Steve Matson
Chrysothamnus viscidiflorus subsp. puberulus
click for enlargement
© 2013 Steve Matson
Chrysothamnus viscidiflorus subsp. puberulus
click for enlargement
© 2013 Steve Matson

More photos of Chrysothamnus viscidiflorus subsp. puberulus in CalPhotos


Geographic subdivisions for Chrysothamnus viscidiflorus subsp. puberulus:
SN (e slope), SnBr, GB, DMtns;
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.
READ ABOUT YELLOW FLAGS
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.