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Vascular Plants of California
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Sidotheca trilobata
THREE-LOBED STARRY PUNCTUREBRACT


Higher Taxonomy
Family: PolygonaceaeView DescriptionDichotomous Key
Common Name: BUCKWHEAT FAMILY
Habit: Annual to shrub [tree]. Stem: nodes swollen or not. Leaf: simple, basal or cauline, generally alternate; ocreae present or 0, generally scarious, persistent or not. Inflorescence: flower clusters in axillary to terminal cyme-, panicle-, raceme-, spike-, umbel- or head-like arrangements, entire inflorescence or main inflorescence branches generally subtended by bracts ("inflorescence bracts"); peduncles present or 0; flower clusters in Eriogoneae-Eriogonoideae subtended by involucre of >= 1 free or +- fused, sometimes awn-tipped bracts ("involucre bracts") or, in Polygonoideae and rarely in Eriogonoideae, not (if bracts completely fused, involucre "tubular"); pedicels in Eriogoneae each often subtended by 2 free, transparent, linear bractlets or in Polygonoideae all subtended by 2+ fused, membranous, wide bractlets. Flower: generally bisexual, small, 1--200 per node; perianth parts 2--6, generally in 2 whorls, free or basally fused, generally petal-like, often +- concave adaxially, often darker at midvein, often turning +- red or +- brown in age; stamens [1]3 or 6--9 in 2 whorls; ovary superior, 1-chambered, ovule 1, styles 1--3. Fruit: achenes, included in or exserted from perianth, generally 3-angled, ovoid or elliptic, generally glabrous.
Genera In Family: 48 genera, +- 1200 species: worldwide, especially northern temperate; some cultivated for food (Coccoloba, sea-grape; Fagopyrum, Rheum, Rumex) or ornamental (Antigonon, lovechain; Coccoloba; Muehlenbeckia; Persicaria; Polygonum), a few timbered (Coccoloba; Triplaris). Several (Emex; Fallopia; Persicaria; Polygonum; Rumex) are weeds. Note: Treatment of genera in Eriogonoideae based on monographic work of James L. Reveal. Involucre number throughout is number (1--many) per ultimate grouping, at tips of ultimate branches; flower number is per flower cluster or involucre, unless otherwise stated. Fagopyrum esculentum Moench not naturalized, considered an historical waif (or garden weed +- presently), therefore not treated.
eFlora Treatment Author: Mihai Costea, except as noted
Scientific Editor: Thomas J. Rosatti, Bruce G. Baldwin.
Genus: SidothecaView DescriptionDichotomous Key


Common Name: STARRY PUNCTUREBRACT
Habit: Annual, generally spreading, glabrous or glandular. Leaf: basal, linear to narrow, hairy, glandular, awns 0; ocreae 0. Inflorescence: terminal, cyme-like; peduncle erect to spreading; involucre 1, tubular, teeth 5(6), awned. Flower: 2--5(10), hairy, glandular; perianth white to rose or green-yellow to red, lobes 6, 3-lobed to fringed; stamens 9. Fruit: brown, obconic, glabrous; embryo curved.
Etymology: (Greek: star case, for involucre)
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti
Sidotheca trilobata (A. Gray) Reveal
NATIVE
Habit: Plant 0.7--5 dm, 0.7--6(11) dm diam. Leaf: blades 1--5(9) cm, 0.2--0.7(2) cm wide, linear or narrow. Inflorescence: bract awns 0.8--1 mm; peduncles erect to spreading, 0.5--1.5 cm, glabrous, glandular proximally; involucre 3--8 mm, glandular, teeth 5(6), awns 0.3--2 mm, +- green to +- red. Flower: 3--5(10), 2.5--4 mm; perianth white to pink or +- red, lobes 3-lobed. Fruit: 1.2--2 mm. Chromosomes: n=20.
Ecology: Common. Sand; Elevation: 700--2100 m. Bioregional Distribution: SnGb, SnBr, PR, w DMtns (Little San Bernardino Mtns); Distribution Outside California: Baja California. Flowering Time: Apr--Sep
Synonyms: Eriogonum trilobatum (A. Gray) S. Stokes; Oxytheca trilobata A. Gray
Jepson eFlora Author: James L. Reveal & Thomas J. Rosatti
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Sidotheca trilobata

botanical illustration including Sidotheca trilobata

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Citation for this treatment: James L. Reveal & Thomas J. Rosatti 2012, Sidotheca trilobata, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=81336, accessed on April 25, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 25, 2024.

Sidotheca trilobata
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©2014 Keir Morse
Sidotheca trilobata
click for enlargement
©2014 Keir Morse
Sidotheca trilobata
click for enlargement
©2015 Chris Winchell
Sidotheca trilobata
click for enlargement
©2015 Chris Winchell
Sidotheca trilobata
click for enlargement
©2014 Keir Morse

More photos of Sidotheca trilobata
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Geographic subdivisions for Sidotheca trilobata:
SnGb, SnBr, PR, w DMtns (Little San Bernardino Mtns)
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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).





 

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).