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Vascular Plants of California
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Hesperochiron pumilus

Higher Taxonomy
Family: HydrophyllaceaeView DescriptionDichotomous Key
Habit: Annual, perennial herb, generally hairy, generally taprooted. Stem: prostrate to erect. Leaf: simple to pinnately compound, basal or cauline, alternate or opposite; stipules 0. Inflorescence: cyme, generally raceme-like and coiled, or flowers 1. Flower: bisexual, generally radial; calyx lobes generally 5, generally fused at base, generally persistent, enlarging in fruit; corolla rotate to cylindric, generally deciduous, lobes generally 5, appendages in pairs on tube between filaments or 0; stamens generally 5, epipetalous, filament base sometimes appendaged, appendages scale-like; ovary generally superior, chambers 1 or 2, placentas 2, parietal, enlarged into chamber, sometimes meeting so ovary appears 2--5-chambered, style 1, style branches 2, stigmas generally head-like. Fruit: capsule, generally loculicidal; valves generally 2.
Genera In Family: 12 genera, 240--260 species: especially western US; some cultivated (Emmenanthe, Nemophila, Phacelia). Note: Included in Boraginaceae in TJM2 and some other treatments (Angiosperm Phylogeny Group IV 2016 Bot J Linn Soc 181:1--20) but treated as separate family (excluding Namaceae) by Boraginales Working Group (Luebert et al. 2016).
eFlora Treatment Author: Genevieve K. Walden, Robert W. Patterson & Richard R. Halse, except as specified
Scientific Editor: Bruce G. Baldwin
Genus: HesperochironView DescriptionDichotomous Key

Habit: Perennial herb, scapose; taprooted, root caudex-like, rhizomes present or 0. Leaf: simple, in basal rosette, minute- to short-hairy or sometimes glabrous in age, glandular-hairy or not; blade tapered to petiole or leaf sessile, linear-lanceolate to ovate, oblanceolate or elliptic, entire; petiole tapered to blade. Inflorescence: axillary from stem base, flowers 1 (few-flowered cyme in well-established plants); peduncle 2--5 cm, +- ascending to +- erect in flower, to 10+ cm, spreading in fruit, short- to long-hairy or glabrous in age. Flower: calyx lobes unequal in size and shape, enlarged in fruit, outer (2)3 broad, inner 2(3) narrow; corolla rotate or bell-shaped, throat yellow or white, lobes white to lavender, generally marked purple; corolla scales 0 or reduced; nectary glands 0; stamens included, unequal to +- equal, attached at 1 level, filaments widened at base, not appendaged, not winged; ovary chamber appearing 1, style 1, included or +- exserted, shallowly 2-lobed. Fruit: 5--11 mm, ovoid, hairy. Seed: 20--40, ovoid, angled, dark- or red-brown, honeycombed or pitted; attached fleshy structure 0.
Etymology: Greek: evening or western centaur
eFlora Treatment Author: Genevieve K. Walden, Robert W. Patterson & Richard R. Halse
Hesperochiron pumilus (Douglas ex Griseb.) Porter
Habit: Plant 2--10 cm, 10+ cm diam.; caudex simple or branched below or at soil surface, sometimes rhizomed. Leaf: generally 2--10, short-glandular hairy; blade 1--8 cm, 0.5--3 cm wide, linear-oblong to oblanceolate or oblong; petiole 1--6(--10) cm, generally +- buried in soil. Inflorescence: flowers generally 1--8 per plant. Flower: calyx lobes 3--9 mm, 1--4 mm wide, linear-oblong to narrowly oblong in flower, 3--10 mm, 2--6 mm wide, broadly lanceolate to ovate in fruit, minute- to short-hairy, glandular; corolla 5--15 mm, +- rotate to broadly bell-shaped, tube and throat generally yellow (white), lobes white or bluish-, purplish-, or pinkish-white or pink, sometimes pink-, lavender-, or purple-veined or -marked, limb (7--)10--30 mm diam, lobes oval to round, broad, glabrous or becoming so adaxially; stamens 8--12 mm, filaments white or yellow; styles 3--8 mm. Fruit: 5--9 mm. Seed: 1--1.5 mm. Chromosomes: n=8.
Ecology: Wet meadows, slopes, flats; Elevation: 400--3000 m. Bioregional Distribution: KR, NCoRI, CaRH, SNH, Teh, WTR, GB (exc W&I), n DMoj (Death Valley); Distribution Outside California: to British Columbia, Montana, Utah, Arizona. Flowering Time: Apr--Jul
Synonyms: Capnorea pumila (Douglas ex Griseb.) Greene; Villarsia pumila Douglas ex Griseb.; Hesperochiron pumilus var. ciliatus (Greene) Brand; Capnorea ciliata (Greene) Greene; Hesperochiron ciliatus Greene; Hesperochiron pumilus f. fulcratus (Greene) Brand; Capnorea fulcrata Greene; Hesperochiron pumilus f. hirtellus (Greene) Brand; Capnorea hirtella Greene; Hesperochiron pumilus f. nervosus (Greene) Brand; Capnorea nervosa Greene; Hesperochiron pumilus var. vestitus Brand; Hesperochiron pumilus f. villosulus (Greene) Brand; Capnorea villosula Greene; Hesperochiron campanulatus (Greene) Brand; Capnorea campanulata Greene
Jepson eFlora Author: Genevieve K. Walden, Robert W. Patterson & Richard R. Halse
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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botanical illustration including Hesperochiron pumilus

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Citation for this treatment: Genevieve K. Walden, Robert W. Patterson & Richard R. Halse 2021, Hesperochiron pumilus, in Jepson Flora Project (eds.) Jepson eFlora, Revision 9,, accessed on December 01, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on December 01, 2023.

Hesperochiron pumilus
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©2017 Aaron Schusteff
Hesperochiron pumilus
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©2016 Keir Morse
Hesperochiron pumilus
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©2009 Barry Breckling
Hesperochiron pumilus
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©2010 James M. Andre
Hesperochiron pumilus
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©2008 Keir Morse

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Geographic subdivisions for Hesperochiron pumilus:
KR, NCoRI, CaRH, SNH, Teh, WTR, GB (exc W&I), n DMoj (Death Valley)
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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).