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Hackelia micrantha

Higher Taxonomy
Family: BoraginaceaeView DescriptionDichotomous Key

Habit: Annual to shrub or small tree, or non-green root parasite, often bristly or sharp-hairy. Stem: prostrate to erect. Leaf: basal and/or cauline, generally simple, generally alternate. Inflorescence: generally cymes, or panicle-, raceme-, head-, or spike-like, generally coiled in flower (often described as scorpioid), generally elongating in fruit, or flowers 1--2 per axil. Flower: bisexual, generally radial; sepals (4)5(10), fused at least at base, or free; corolla (4)5(10)-lobed, salverform, funnel-shaped, rotate, or bell-shaped, generally without scales at tube base, with 0 or 5 appendages at tube top, alternate stamens; stamens epipetalous; ovary generally superior, entire to 4-lobed, style 1(2), entire or 2-lobed or -branched. Fruit: valvate or circumscissile capsule or nutlets 1--4, free (fused), smooth to roughened, prickly or bristly or not.
Genera In Family: +- 120 genera, +- 2300 species: tropics, temperate, especially western North America, Mediterranean; some cultivated (Borago, Heliotropium, Echium, Myosotis, Nemophila, Phacelia, Symphytum, Wigandia). Toxicity: Many genera may be TOXIC from pyrrolizidine alkaloids or accumulated nitrates. Note: Recently treated to include Hydrophyllaceae, Lennoaceae. Wigandia urens added, as naturalized.
eFlora Treatment Author: Ronald B. Kelley, Robert Patterson, Richard R. Halse & Timothy C. Messick, family description, key to genera; treatment of genera by Ronald B. Kelley, except as noted
Scientific Editor: Ronald B. Kelley, Robert Patterson, Thomas J. Rosatti, Bruce G. Baldwin, David J. Keil.
Genus: HackeliaView DescriptionDichotomous Key

Common Name: STICKSEED
Habit: Perennial herb (biennial); hairs appressed to spreading; caudex generally branched in age, often +- woody, taprooted. Stem: ascending or erect. Leaf: lowest petioles generally +- = blades, +- winged, others 0. Inflorescence: coiled cymes, generally > 3, generally terminal and axillary, +- bracted; pedicel in fruit elongated, recurved to reflexed. Flower: calyx deep-5-lobed; corolla rotate-salverform, generally white with yellow patch adaxially, lobes appendaged near base. Fruit: nutlets erect, > style, attachment scar lateral-medial, generally with barb-tipped prickles abaxially and on margin.
Species In Genus: 40 species: generally western North America, southeastern Asia. Etymology: (J. Hackel, Czech botanist, 1783--1869) Note: Values for corolla limb diam take into account shrinkage during flower period. Difficult, study needed, especially in northern California, southeastern Asia; sometimes merged with Lappula.
Unabridged Note: In North America filling old-world role of flat-flowered forget-me-nots, Myosotis, Lepechiniella, etc, for pollinators.
eFlora Treatment Author: Ronald B. Kelley & Robert L. Carr

Hackelia micrantha (Eastw.) J.L. Gentry
Stem: generally many from +- stout, woody caudex, 3--11 dm; hairs generally 0 to +- sparse, at mid-stem generally +- spreading, generally > 1 mm. Leaf: basal 6--33 cm, 0.7--3.7 cm wide, narrow-elliptic to oblanceolate, +- green at flower; lower cauline generally 5--23 cm, 0.6--2.4 cm wide, hairs +- appressed, strigose to rough, generally < 1 mm, occasionally > 1 mm on margins; mid to upper cauline generally elliptic, base tapered to obtuse, not +- clasping. Inflorescence: +- wide, +- strigose; pedicel 5--12 mm in fruit. Flower: calyx 1.5--2.7 mm; corolla tube generally = calyx, throat open, limb (4)5--8(11) mm diam, blue, appendages wider than long. Fruit: nutlets 3--5 mm, abaxial prickles generally 4--10, < marginal. Chromosomes: 2n=24.
Ecology: Meadows, streambanks, shrubby slopes, open forest; Elevation: 1200--3500 m. Bioregional Distribution: KR, NCoRH, CaRH, SNH, MP, n SNE (Sweetwater Mtns); Distribution Outside California: western North America. Flowering Time: Jun--Aug
Synonyms: Hackelia jessicae (E.A. McGregor) Brand
Unabridged Note: Most commonly collected Hackelia in California, in widespread, +- expansive populations. CA-FP plants tend to have smaller corollas than those farther northern and e, where other larger-flowered Hackelia species, such as Hackelia nervosa and Hackelia amethystina, are lacking; corolla size does not distinguish from Hackelia floribunda in SN.
eFlora Treatment Author: Ronald B. Kelley & Robert L. Carr
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botanical illustration including Hackelia micrantha


Citation for this treatment: Ronald B. Kelley & Robert L. Carr 2016. Hackelia micrantha, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 29, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 29, 2016.

Hackelia micrantha
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© 2005 Christopher L. Christie
Hackelia micrantha
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© 2010 Keir Morse
Hackelia micrantha
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© 2004 Steve Matson
Hackelia micrantha
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© 1999 Gary A. Monroe
Hackelia micrantha
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© 2004 Steve Matson
Hackelia micrantha
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© 2009 Barry Breckling

More photos of Hackelia micrantha in CalPhotos

Geographic subdivisions for Hackelia micrantha:
KR, NCoRH, CaRH, SNH, MP, n SNE (Sweetwater Mtns);
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.