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Systenotheca vortriedei
VORTRIEDE'S SPINEFLOWER

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: SystenothecaView Description 


Species In Genus: 1 sp. Etymology: (Greek: tapered case, for involucre teeth)
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti

Systenotheca vortriedei (Brandegee) Reveal & Hardham
NATIVE
Habit: Annual, spreading, 0.2--1.5 dm, 0.2--1 dm diam, glandular. Leaf: basal; blades (1)2--5 cm, (0.4)0.5--1 cm wide, awn 0; ocreae 0. Inflorescence: terminal, cyme-like; peduncle 0; involucre 1, 2.5--4 mm, 4-angled, swollen, teeth 4, short awned. Flower: 2, upper perfect, 1--1.5 mm, lower pistillate, 2--2.5 mm; perianth 2-colored, floral tube yellow, lobes 6, white to pink or rose, glabrous, papillate, 2-lobed; stamens 9. Fruit: 2--2.5 mm, brown to black, obconic, glabrous; embryo curved. Chromosomes: n=19, 20.
Ecology: Sand; Elevation: 700--1500 m. Bioregional Distribution: SCoRO (Santa Lucia Range, Monterey, Santa Luis Obispo cos.). Flowering Time: May--Jul
Synonyms: Centrostegia vortriedei (Brandegee) Goodman; Chorizanthe vortriedei Brandegee
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

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botanical illustration including Systenotheca vortriedei

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Citation for this treatment: James L. Reveal & Thomas J. Rosatti 2016. Systenotheca vortriedei, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=46004, accessed on February 12, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 12, 2016.


Systenotheca vortriedei
click for enlargement
© 2004 Aaron Schusteff
Systenotheca vortriedei
click for enlargement
© 2004 Aaron Schusteff
Systenotheca vortriedei
click for enlargement
© 2014 Aaron Schusteff
Systenotheca vortriedei
click for enlargement
© 2014 Aaron Schusteff
Systenotheca vortriedei
click for enlargement
© 2004 Aaron Schusteff
Systenotheca vortriedei
click for enlargement
© 2006 Aaron Schusteff

More photos of Systenotheca vortriedei in CalPhotos


Geographic subdivisions for Systenotheca vortriedei:
SCoRO (Santa Lucia Range, Monterey, Santa Luis Obispo cos.).
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.