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Vascular Plants of California
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Horsfordia newberryi

Higher Taxonomy
Family: MalvaceaeView DescriptionDichotomous Key
Habit: Annual to tree; generally with stellate hairs, often with bristles or peltate scales; juice generally mucilage-like; bark fibrous. Leaf: generally cauline, alternate, petioled, simple [palmate-compound], generally palmate-lobed and/or veined, generally toothed, evergreen or not; stipules persistent or not. Inflorescence: head, spike, raceme, or panicle, in panicle or not (a compound panicle), or flowers >= 1 in leaf axils, or flowers generally 1 opposite a leaf or on a spur; bracts leaf-like or not; bractlets 0 or on flowering stalks, often closely subtending calyx, generally in involucel. Flower: generally bisexual, radial; sepals 5, generally fused at base, abutting in bud, larger in fruit or not, nectaries as tufts of glandular hairs at base; petals (0)5, free from each other but generally fused at base to, falling with filament tube, clawed or not; stamens 5--many, filaments fused for most of length into tube around style, staminodes 5, alternate stamens, or generally 0; pistil 1, ovary superior, stalked or generally not, chambers generally >= 5, styles or style branches, stigmas generally 1 or 1--2 × chamber number. Fruit: loculicidal capsule, [berry], or 5--many, disk- or wedge-shaped segments (= mericarps).
Genera In Family: 266 genera, 4025 species: worldwide, especially warm regions; some cultivated (e.g., Abelmoschus okra; Alcea hollyhock; Gossypium cotton; Hibiscus hibiscus). Note: Recently treated to include Bombacaceae, Sterculiaceae, Tiliaceae. Mature fruit needed for identification; "outer edges" are surfaces between sides and back (abaxial surface) of segment. "Flower stalk" used instead of "pedicel," "peduncle," especially where both needed (i.e., when flowers both 1 in leaf axils and otherwise).
eFlora Treatment Author: Steven R. Hill, except as noted
Scientific Editor: Steven R. Hill, Thomas J. Rosatti.
Genus: HorsfordiaView DescriptionDichotomous Key

Habit: [Subshrub], shrub, densely stellate-tomentose or -scabrous. Stem: erect. Leaf: petiole stout; blade lanceolate to +- round or cordate, +- entire or irregularly fine-toothed; stipules 2--5 mm. Inflorescence: axillary racemes clustered terminally or flowers 1 in leaf axils [panicle]; bractlets 0. Flower: petals white, yellow, blue-lavender, rose, or pink; anthers at tip of filament tube; styles 6--11, > anthers, stigmas head-like. Fruit: +- glabrous; segments 6--12, below indehiscent, firm, net-veined, above dehiscent, with 2 spreading, scarious wings. Seed: 1--3 per segment, puberulent or minutely ridged.
Etymology: (F.H. Horsford, Vermont botanist, collector, 1855--1923)
eFlora Treatment Author: John C. La Duke
Unabridged Reference: Fryxell 1985 Syst Bot 10:268--272; Fryxell 1988 Syst Bot Monogr 25:234--240
Horsfordia newberryi (S. Watson) A. Gray
Stem: 2--3 m, +- yellow. Leaf: petioles << blade; blade 4--10 cm, narrowly ovate, finely toothed, base truncate to +- cordate, tip obtuse to acute. Inflorescence: flowering stalks 5--12(16) mm. Flower: calyx 5--6 mm, lobed 1/2; styles +- 10. Fruit: 7--9 mm diam, generally +- purple on top, segments +- 10, lower part 1-seeded, upper generally 2-seeded; wings +- 5 mm, 4 mm wide. Seed: 3 per segment, +- white. Chromosomes: 2n=30.
Ecology: Creosote-bush scrub; Elevation: generally 100--800 m. Bioregional Distribution: PR, w DSon; Distribution Outside California: to southwestern Arizona, northern Mexico. Flowering Time: Mar--Apr, Nov--Dec
Jepson eFlora Author: John C. La Duke
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

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Botanical illustration including Horsfordia newberryi

botanical illustration including Horsfordia newberryi

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Citation for this treatment: John C. La Duke 2012, Horsfordia newberryi, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 02, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on December 02, 2023.

Horsfordia newberryi
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©2015 Keir Morse
Horsfordia newberryi
click for enlargement
©2015 Keir Morse
Horsfordia newberryi
click for enlargement
©2015 Keir Morse
Horsfordia newberryi
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©2015 Keir Morse
Horsfordia newberryi
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©2009 Barry Breckling

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Geographic subdivisions for Horsfordia newberryi:
PR, w DSon
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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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).