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Vascular Plants of California
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Sagina decumbens subsp. occidentalis
WESTERN PEARLWORT


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. Seed: appendage generally 0 (present in Moehringia).
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: SaginaView DescriptionDichotomous Key


Common Name: PEARLWORT
Habit: Annual, perennial herb, tufted to matted, taprooted. Leaf: linear to awl-shaped, generally not fleshy; vein 0--1. Inflorescence: terminal or axillary; flower 1; pedicels 2--30 mm. Flower: sepals 4--5, free, 1.3--3.5 mm, lanceolate to ovate, glabrous to glandular-hairy; petals 0 or 4--5, 1--3 mm, entire or notched; stamens 4, 5, 8, 10; styles 4--5, 0.1--0.6 mm. Fruit: capsule, ovoid; valves 4--5, spreading to recurved. Seed: many, generally obliquely triangular, +- compressed, brown or red-brown.
Species In Genus: +- 25 species: northern temperate, tropical mountains. Etymology: (Latin: fatten, from early use as forage)
Reference: Crow 2005 FNANM 5:140--147
Sagina decumbens (Elliott) Torr. & A. Gray subsp. occidentalis (S. Watson) G.E. Crow
NATIVE
Habit: Annual (2)4--16 cm, glabrous or +- glandular-hairy distally; sterile basal rosettes 0. Stem: thread-like, generally erect or ascending. Leaf: glabrous; blade 4--20 mm, narrowly linear. Inflorescence: pedicels 2--14(20) mm, thread-like, generally straight, glabrous or +- glandular-hairy. Flower: sepals generally 5, +- appressed in fruit, 1.7--2.1(2.5) mm, +- glandular-hairy; petals generally 5, +- = sepals; stamens 5 or 10. Fruit: 1.2--1.7 × sepals. Seed: +- 0.4 mm, smooth to slightly roughened, brown; back grooved.
Ecology: Dry streams, chaparral, grassy areas, rock outcrops, vernal pools; Elevation: < 2000 m. Bioregional Distribution: NW, n&c SN, GV, CCo, SnFrB, SCo, ChI, PR, MP; Distribution Outside California: to British Columbia, Baja California. Flowering Time: Spring--early summer
Synonyms: Sagina occidentalis S. Watson
Unabridged Note: 1 other subsp., in eastern North America.
Jepson eFlora Author: Ronald L. Hartman & Richard K. Rabeler
Reference: Crow 2005 FNANM 5:140--147
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Citation for this treatment: Ronald L. Hartman & Richard K. Rabeler 2012, Sagina decumbens subsp. occidentalis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=52717, accessed on November 22, 2019.

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

Sagina decumbens subsp. occidentalis
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© 2010 Vernon Smith
Sagina decumbens subsp. occidentalis
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© 2018 Vernon Smith
Sagina decumbens subsp. occidentalis
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© 2015 Barry Breckling
Sagina decumbens subsp. occidentalis
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© 2004 Carol W. Witham

More photos of Sagina decumbens subsp. occidentalis in CalPhotos



Geographic subdivisions for Sagina decumbens subsp. occidentalis:
NW, n&c SN, GV, CCo, SnFrB, SCo, ChI, PR, MP
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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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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.