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Chorizanthe membranacea
PINK 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
Genus: ChorizantheView DescriptionDichotomous Key

Common Name: SPINEFLOWER
Habit: Annual [perennial herb], prostrate to erect, generally hairy. Leaf: basal or cauline, alternate, linear to narrow, awns 0; ocreae 0. Inflorescence: terminal, generally cyme- or head-like, hairy [(glabrous)]; peduncles 0; involucres generally 1--6, tubular, 3--6-ribbed, teeth 3, 5, or 6, awned. Flower: 1(2), glabrous or hairy; perianth white, yellow, red, maroon, or purple, lobes (5)6, entire, notched or lobed to fringed; stamens generally 3, 6, or 9. Fruit: generally brown or black, generally elliptic, glabrous; embryo straight or curved.
Species In Genus: +- 50 species: temperate western North America; southwestern South America. Etymology: (Greek: divided flower, for perianth lobes) Note: Involucre length measurements including teeth and awns unless otherwise specified. Chorizanthe minutiflora newly described, added.
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti

Chorizanthe membranacea Benth.
NATIVE
Habit: Plant erect, 1--6(10) dm, hairy. Leaf: blades (1)1.5--5 cm, 0.1--0.3 cm wide, generally linear, tomentose abaxially. Inflorescence: bracts generally 2 (or a whorl of 3--5), awns 0.5--1 mm, straight; involucre 3--4 mm, 3-angled, 6-ribbed, tomentose to +- glabrous, +- swollen, teeth 5, 0.5--1 mm, margins scarious, awns 0.7--1.5 mm, hooked. Flower: 1(2), (1.5)2.5--3 mm, hairy; perianth white to rose, lobes entire; stamens 9. Fruit: 2.5--3 mm. Chromosomes: n=19--20,(22),40--41.
Ecology: Common. Sand, gravel or rocks; Elevation: 40--1400 m. Bioregional Distribution: NW, CaR, SNF, Teh, GV, CW, n WTR; Distribution Outside California: south-central Oregon. Flowering Time: Apr--Jul
Synonyms: Eriogonella membranacea (Benth.) Goodman
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti
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Citation for this treatment: James L. Reveal & Thomas J. Rosatti 2016. Chorizanthe membranacea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=19342, accessed on August 23, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on August 23, 2016.


Chorizanthe membranacea
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© 2014 Steve Matson
Chorizanthe membranacea
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© 2007 Neal Kramer
Chorizanthe membranacea
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© 2009 Keir Morse
Chorizanthe membranacea
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© 2013 Aaron Schusteff
Chorizanthe membranacea
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© 2011 Neal Kramer
Chorizanthe membranacea
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© 2013 Aaron Schusteff

More photos of Chorizanthe membranacea in CalPhotos


Geographic subdivisions for Chorizanthe membranacea:
NW, CaR, SNF, Teh, GV, CW, n WTR;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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.