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Dendromecon harfordii

Higher Taxonomy
Family: PapaveraceaeView DescriptionDichotomous Key

Habit: Annual to small tree; sap colorless, yellow, orange, red, or white. Leaf: basal, cauline, or both, simple and entire, toothed, or lobed, or 1--3-pinnate-dissected or compound; cauline generally alternate; stipules 0. Inflorescence: terminal, 1-flowered or cyme, raceme, or panicle; bracts generally present. Flower: bisexual, radial, bilateral, or biradial; sepals 2--3, shed after flower; petals generally 2 × sepals in number; stamens generally many; ovary 1, superior, chamber 1, style 0 or 1, stigmas or lobes 2--many, ovules few to many. Fruit: capsule, dehiscent by valves or pores, +- nut, or breaking transversely into 1-seeded, indehiscent units. Seed: fleshy appendage generally 0.
Genera In Family: 25--30 genera, 200 species: northern temperate, northern tropics; some cultivated (Papaver, Eschscholzia, Hunnemannia), source of opiates. Note: Stylomecon moved to Papaver. Corydalis, Dicentra, Fumaria in Fumariaceae in FNANM, elsewhere. Glaucium flavum Crantz is a waif. According to FNANM (3:300--301), Hunnemannia fumariifolia Sweet (+- like Eschscholzia except sepals free) an occasional waif in California, but documentation evidently lacking. Fleshy appendage of seed sometimes for dispersal by ants.
eFlora Treatment Author: Gary L. Hannan & Curtis Clark, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: DendromeconView DescriptionDichotomous Key

Common Name: TREE POPPY
Habit: Shrub to small tree, evergreen; sap colorless. Leaf: simple, entire or minutely toothed. Inflorescence: terminal, 1-flowered. Flower: receptacle funnel-shaped around ovary base; sepals 2, shed at flower; petals 4(6), free, 2--3 cm, obovate or wedge-shaped, yellow, satiny, shed after flower; stamens many, free; placentas 2, style 0, stigma lobes 2, flat. Fruit: linear, dehiscent from base. Seed: many, 2--3 mm, obovate, smooth, brown or black; fleshy appendage present.
Species In Genus: 2 species: California, Baja California. Etymology: (Greek: tree poppy)

Dendromecon harfordii Kellogg
Habit: Plant 2--6 m. Leaf: 3--8 cm, 1.5--4.5 cm wide. Flower: petals 2--3 cm. Fruit: 7--10 cm. Seed: 2.5--3 mm.
Ecology: Shrubby slopes; Elevation: < 600 m. Bioregional Distribution: ChI. Flowering Time: Apr--Jul
Synonyms: Dendromecon flexile Greene; Dendromecon harfordii var. harfordii; Dendromecon harfordii var. rhamnoides (Greene) Munz; Dendromecon rhamnoides Greene; Dendromecon rigida Benth. subsp. harfordii (Kellogg) P.H. Raven; Dendromeda rigida subsp. rhamnoides (Greene) Thorne
eFlora Treatment Author: Gary L. Hannan & Curtis Clark
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Listed on CNPS Rare Plant Inventory

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Citation for this treatment: Gary L. Hannan & Curtis Clark 2016. Dendromecon harfordii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 04, 2016.

Dendromecon harfordii
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© 2014 Steve Matson
Dendromecon harfordii
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© 2014 Steve Matson
Dendromecon harfordii
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© 2010 Thomas Stoughton
Dendromecon harfordii
click for enlargement
© 2010 Thomas Stoughton
Dendromecon harfordii
click for enlargement
© 2009 Thomas Stoughton
Dendromecon harfordii
click for enlargement
© 2010 Thomas Stoughton

More photos of Dendromecon harfordii in CalPhotos

Geographic subdivisions for Dendromecon harfordii:
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.