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Vascular Plants of California
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Oncosiphon pilulifer
STINKNET


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; 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: OncosiphonView Description 


Habit: Annual, scented. Stem: several from base, branched. Leaf: alternate, 2--3-pinnately dissected; segments linear, dotted with resin glands. Inflorescence: heads discoid, 1--4 in cyme-like clusters; receptacle convex to conic, epaleate; phyllaries graduated in 3--4 series, margins scarious. Flower: generally 100--250+; corolla yellow, tubular, 4-lobed, tube and proximal throat not externally differentiated, swollen; anthers minute, tip lanceolate, base rounded or +- cordate; style short, branches truncate, tips bushy. Fruit: cylindric or 4-angled and ribbed, faces resin-gland-dotted; pappus a narrow crown.
Species In Genus: 8 species: southern Africa. Etymology: (Greek: swollen tube, describing corolla)
eFlora Treatment Author: David J. Keil
Reference: Källersjö 1988 Bot J Linn Soc 96:299--322; Keil 2006 FNANM 19:539
Oncosiphon pilulifer (L. f.) Källersjö
NATURALIZED
Habit: Plants 15--45(70) cm, pungently scented. Stem: branched distally or throughout. Leaf: 1--4+ cm, puberulent or minutely strigose. Inflorescence: heads generally 5--8 mm diam, +- spheric. Flower: corolla 1.5--2 mm. Fruit: 0.6--0.8 mm, tip and pappus crown 0.05--0.1 mm, entire or minutely toothed.
Ecology: Disturbed sites; coastal scrub, chaparral; Elevation: < 500 m. Bioregional Distribution: SnJV (se of Taft), SCo, PR, DSon; Distribution Outside California: Arizona; native to South Africa; alien in Australia. Flowering Time: Mar--Jul
Synonyms: Matricaria globifera (Thunb.) Fenzl ex Harv.; Oncosiphon piluliferum (L. f.) Källersjö, orth. var.
Jepson eFlora Author: David J. Keil
Reference: Källersjö 1988 Bot J Linn Soc 96:299--322; Keil 2006 FNANM 19:539
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Citation for this treatment: David J. Keil 2012, Oncosiphon pilulifer, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=103818, accessed on August 22, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on August 22, 2019.

Oncosiphon piluliferum
click for enlargement
© 2016 Keir Morse
Oncosiphon piluliferum
click for enlargement
© 2016 Keir Morse
Oncosiphon piluliferum
click for enlargement
© 2016 Keir Morse
Oncosiphon piluliferum
click for enlargement
© 2016 Keir Morse
Oncosiphon piluliferum
click for enlargement
© 2016 Keir Morse

More photos of Oncosiphon piluliferum in CalPhotos



Geographic subdivisions for Oncosiphon pilulifer:
SnJV (se of Taft), SCo, PR, DSon
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(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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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.