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Chorizanthe orcuttiana
ORCUTT'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
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 orcuttiana Parry
NATIVE
Habit: Plant prostrate, 0.1--0.5 dm, 0.3--2(2.5) dm diam, hairy. Leaf: blades 0.5--1.5 cm, 0.2--0.35(0.5) cm wide. Inflorescence: bracts 2, awns 0 or 0.6--1 mm, straight; involucre 0.8--2 mm, 3-angled, 3-ribbed, faintly transversely ridged, teeth 3, 1.8--2 mm, awns 0.6--1 mm, hooked. Flower: 1, 1.5--1.8 mm, densely hairy; perianth yellow, lobes entire; stamens 9. Fruit: 2--2.2 mm. Chromosomes: n=(18--19)20(21).
Ecology: Sand; Elevation: 60--200 m. Bioregional Distribution: s SCo (Del Mar to Point Loma, San Diego Co., extirpated elsewhere). Flowering Time: Mar--May
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti
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Listed on CNPS Rare Plant Inventory

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Citation for this treatment: James L. Reveal & Thomas J. Rosatti 2016. Chorizanthe orcuttiana, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=19344, accessed on April 30, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on April 30, 2016.


Chorizanthe orcuttiana
click for enlargement
© 2015 Keir Morse
Chorizanthe orcuttiana
click for enlargement
© 2015 Keir Morse
Chorizanthe orcuttiana
click for enlargement
© 2015 Keir Morse
Chorizanthe orcuttiana
click for enlargement
© 2015 Keir Morse
Chorizanthe orcuttiana
click for enlargement
© 2015 Keir Morse
Chorizanthe orcuttiana
click for enlargement
© 2015 Keir Morse

More photos of Chorizanthe orcuttiana in CalPhotos


Geographic subdivisions for Chorizanthe orcuttiana:
s SCo (Del Mar to Point Loma, San Diego Co., extirpated elsewhere).
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.