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Mucronea perfoliata

Higher Taxonomy
Family: PolygonaceaeView DescriptionDichotomous Key

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: MucroneaView DescriptionDichotomous Key

Habit: Annual, erect to spreading, glandular-hairy. Leaf: basal; blades entire, generally narrow, awns 0; ocreae 0. Inflorescence: terminal, cyme-like; bracts fused, on +- 1 side of or around node, awned; peduncles 0; involucres 1--3, (2)3--4-angled, tubular, occasionally swollen, teeth (2)3--4, unequal, awned. Flower: 1(2), hairy; perianth white to pink, lobes 6, entire or fringed; stamens 6 or 9. Fruit: generally elliptic, glabrous, brown to black; embryo straight.
Species In Genus: 2 species: California. Etymology: (Latin: sharp point, for awns of bracts, involucres)
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti

Mucronea perfoliata (A. Gray) A. Heller
Habit: Plant (0.2)0.3--2(3) dm, 0.5--5 dm diam. Leaf: blades (1)2--5 cm, (0.2)0.3--1.2(2) cm wide. Inflorescence: lower bracts 3, awns 0.3--1.2(1.5) mm; involucre 4-angled, ribbed, generally transversely ridged, swollen basally, 3--5(6) mm. Flower: 1.5--3(3.5) mm, hairy; stamens 9. Fruit: 2--3 mm. Chromosomes: n=19, 20.
Ecology: Common. Sand or gravel; Elevation: 100--1600 m. Bioregional Distribution: s SNF, Teh, SnJV, SCoRI, n WTR, w DMoj. Flowering Time: Mar--Jul
Synonyms: Chorizanthe perfoliata A. Gray; Mucronea perfoliata var. opaca Hoover
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti
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botanical illustration including Mucronea perfoliata


Citation for this treatment: James L. Reveal & Thomas J. Rosatti 2016. Mucronea perfoliata, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on February 07, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on February 07, 2016.

Mucronea perfoliata
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© 2015 Keir Morse
Mucronea perfoliata
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© 2015 Keir Morse
Mucronea perfoliata
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© 2009 Neal Kramer
Mucronea perfoliata
click for enlargement
© 2015 Keir Morse
Mucronea perfoliata
click for enlargement
© 2015 Keir Morse
Mucronea perfoliata
click for enlargement
© 2011 Neal Kramer

More photos of Mucronea perfoliata in CalPhotos

Geographic subdivisions for Mucronea perfoliata:
s SNF, Teh, SnJV, SCoRI, n WTR, w DMoj.
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.
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.