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Scleranthus annuus subsp. annuus

Higher Taxonomy
Family: CaryophyllaceaeView DescriptionDichotomous Key

Common Name: PINK FAMILY
Habit: Annual to perennial herb; rarely dioecious (Silene), taprooted or rhizome generally slender. Leaf: simple, generally opposite (subwhorled), entire, pairs at nodes often +- connected at bases; stipules generally 0; petiole generally 0. Inflorescence: generally cyme, generally open; flowers 1--many; involucre generally 0 (present in Dianthus, Petrorhagia). Flower: generally bisexual, radial; hypanthium often present but obscure; sepals (4)5, +- free or fused into a tube, margins generally scarious, more so on inner 2 or not, tube generally not scarious, awns generally 0; petals (4)5 or 0, generally tapered to base (or with claw long, limb expanded), entire to 2--several-lobed, limb generally without scale-like appendages adaxially, generally without ear-like lobes at base; stamens generally 10, generally fertile, generally free, generally from ovary base; nectaries 0 or 5; ovary superior, generally 1-chambered, placentas basal or free-central, styles 2--5 with 0 branches or 1 with 2--3 branches. Fruit: capsule or utricle (rarely +- dehiscent), generally sessile.
Genera In Family: 83 or 89 genera, 3000 species: widespread, especially arctic, alpine, temperate northern hemisphere; some cultivated (Agrostemma, Arenaria, Cerastium, Dianthus, Gypsophila, Lychnis, Sagina, Saponaria, Silene, Vaccaria). Note: Apetalous Caryophyllaceae can also be keyed in Rabeler & Hartman 2005 FNANM 5:5--8.
eFlora Treatment Author: Ronald L. Hartman & Richard K. Rabeler, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: ScleranthusView Description 

Common Name: KNAWEL
Habit: Annual, biennial, prostrate to erect, taprooted. Leaf: blade needle-like; vein 1. Inflorescence: axillary, dense; flowers 1--5, +- sessile. Flower: hypanthium widely obovate to urn-shaped, abruptly expanded distally, in fruit hard; sepals 5, free, 1.5--4 mm, narrowly triangular to awl-shaped, glabrous, margin thinly scarious; petals 0; stamens 2--10, on hypanthium rim; styles 2. Fruit: utricle, ovoid. Seed: 1.
Species In Genus: 10 species: Eurasia, Africa, Australia. Etymology: (Greek: hard flower, from hypanthium in fruit)

Scleranthus annuus L. subsp. annuus
NATURALIZED
Stem: prostrate to erect, much-branched, generally 4--20 cm, rigid; hairs +- in lines, fine, recurved. Leaf: 4--20+ mm; sheath scarious, ciliate; tip sharp-pointed. Inflorescence: 3--15 mm diam. Flower: 3--4.2 mm; hypanthium 10-ribbed; sepals narrowly triangular to awl-shaped, erect to spreading; styles +- 0.8--1 mm. Seed: 1.4--1.6 mm, widely ovoid, tan except red crescent near acute tip. Chromosomes: 2n=44.
Ecology: Meadows, stream margins, serpentine areas, disturbed areas; Elevation: 300--1200 m. Bioregional Distribution: KR, NCoRO, NCoRH, CaR, n SN, c SNF, PR; Distribution Outside California: to British Columbia, Saskatchewan, eastern North America; native to Europe. Flowering Time: All year
Unabridged Note: 7 other subspecies, native to Europe, western Asia, northern Africa.
eFlora Treatment Author: Ronald L. Hartman & Richard K. Rabeler
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Citation for this treatment: Ronald L. Hartman & Richard K. Rabeler 2016. Scleranthus annuus subsp. annuus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=77174, accessed on May 02, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 02, 2016.


Scleranthus annuus subsp. annuus
click for enlargement
© 2008 Keir Morse
Scleranthus annuus subsp. annuus
click for enlargement
© 2005 Steve Matson
Scleranthus annuus subsp. annuus
click for enlargement
© 2005 Steve Matson
Scleranthus annuus subsp. annuus
click for enlargement
© 2005 Steve Matson
Scleranthus annuus subsp. annuus
click for enlargement
© 2008 Steve Matson
Scleranthus annuus subsp. annuus
click for enlargement
© 2010 Barry Breckling

More photos of Scleranthus annuus subsp. annuus in CalPhotos


Geographic subdivisions for Scleranthus annuus subsp. annuus:
KR, NCoRO, NCoRH, CaR, n SN, c SNF, PR;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.