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Vascular Plants of California
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Downingia pusilla

DWARF DOWNINGIA


Higher Taxonomy
Family: CampanulaceaeView DescriptionDichotomous Key
Common Name: BELLFLOWER FAMILY
Habit: Annual to perennial herb [tree]. Leaf: generally cauline, generally simple, generally alternate, petioled or not; stipules 0. Inflorescence: cyme, panicle, raceme, spike, or flowers 1; terminal or in axils of leaf-like or reduced bracts. Flower: bisexual, cleistogamous or open, radial or bilateral, inverted (pedicel twisted 180°) or not; hypanthium generally present, +- fused to ovary; sepals generally 5; corolla radial to 2-lipped, petals generally fused, tube deeply divided on 1 side or not, lobes generally 5; stamens 5, free or +- fused (anthers, filaments fused into tube or filaments fused above middle); ovary inferior or 1/2 inferior (superior in fruit), chambers 1--3, placentas axile or parietal, ovules many, style generally 1, 2--5-branched. Fruit: generally capsule, open on sides or top by pores or short valves. Seed: many.
Genera In Family: +- 90 genera, +- 2500 species: worldwide. Note: Some cultivated for ornament (Campanula, Jasione, Lobelia). Subfamilies sometimes treated as families. Positions of flower parts given after flowering inversion, if any. Parishella moved to Nemacladus.
eFlora Treatment Author: Nancy R. Morin, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: DowningiaView DescriptionDichotomous Key


Habit: Annual, glabrous. Stem: decumbent to erect, (10)20--40 cm. Leaf: cauline, often deciduous before flower, 0.5--2(4) mm wide, lanceolate to awl-like (uppermost wider or not), sessile, generally entire. Inflorescence: spike; terminal flowers often aborted, overtopped by fertile; pedicels 0. Flower: bilateral, generally inverted at full bloom by twisted ovary; corolla generally >> calyx, blue to pink or white, generally with a symmetric white or yellow spot on lower lip, tube entire, limb strongly 2-lipped, upper lip lobes 2, lower lip generally with 2 low ridges, these often with 2 knob-like projections near throat, lobes 3, > upper, generally obovate, obtuse-mucronate; stamens fused (filaments, anthers in tubes), generally 2 smallest anthers each with terminal tuft of bristles, 1 bristle triangular or horn-like, generally 0.2--0.5 mm, others linear, shorter; ovary inferior, long, narrow, +- pedicel-like, chambers 1--2, placentas parietal or axile. Fruit: dehiscent on sides by 3--5 sometimes translucent slits, tardily so or not.
Etymology: (A.J. Downing, American horticulturist, 1815--1852) Note: Flower part positions ("upper" is adaxial; "lower" is abaxial) given at full bloom. Corolla measurements are from base of tube to tip of longest lobe, color including albino for +- all species. Based on geography, interfertility, cytology, and sequences of nuclear as well as chloroplast DNA, Downingia yina Applegate (as recognized in TJM (1993)) split here into 3 morphologically indistinguishable species whose limits need further study, only 2 of which are documented for California: Downingia pulcherrima, Downingia willamettensis.
Unabridged Note: Flower part positions ("upper" is next to stem; "lower" is away from stem) given at full bloom. Corolla measurements are from base of tube to tip of longest lobe, color including albino for +- all species. Based on geography, interfertility, cytology, and sequences of nuclear as well as chloroplast DNA, Downingia yina (as recognized in TJM (1993)) split here into 3 morphologically indistinguishable species whose limits need further study: Downingia yina (as now circumscribed, not in California, although possibly in -- yet not documented for -- northern CaR), Downingia pulcherrima, and Downingia willamettensis. The present treatment comes after Downingia pulcherrima and Downingia willamettensis had been united under Downingia willamettensis, and that taxon in turn had been transferred to Downingia yina, as Downingia yina var. major (leaving the remainder of that sp. under Downingia yina var. yina).
eFlora Treatment Author: Lisa M. Schultheis
Reference: Schultheis 2001 Syst Bot 26:603--621
Unabridged Reference: McVaugh 1941 Mem Torrey Bot Club 19:1--57; Weiler 1962 Ph.D. Dissertation, Univ of California, Berkeley; Schultheis 2001 Syst Bot 26:603--621
Downingia pusilla (A. DC.) Torr.
NATIVE
Flower: not inverting; corolla 2.5--4 mm, <= calyx, lateral sinuses +- = lower, glabrous, upper lip 3-lobed, with 2 yellow spots near throat, ridges obscure or 0, lobes white or blue, narrowly triangular, acute; anthers < 45° to filaments; ovary glabrous to minutely spiny-scabrous, 2-chambered, placentas axile. Fruit: 15--27 mm, lateral walls tough, lines translucent. Seed: with spiral lines, appearing twisted. Chromosomes: n=11.
Ecology: Vernal pools, roadside ditches; Elevation: < +- 150 m (488 m, NCoRI). Bioregional Distribution: s NCoRO, NCoRI, ScV, n&c SnJV, n SnFrB; Distribution Outside California: Chile. Flowering Time: Mar--May
Synonyms: Downingia humilis (Greene) Rattan
Jepson eFlora Author: Lisa M. Schultheis
Reference: Schultheis 2001 Syst Bot 26:603--621
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

Previous taxon: Downingia pulcherrima
Next taxon: Downingia willamettensis

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Botanical illustration including Downingia pusillabotanical illustration including Downingia pusilla


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Citation for this treatment: Lisa M. Schultheis 2012, Downingia pusilla, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=23283, accessed on November 07, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on November 07, 2024.

Downingia pusilla
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©2011 Dylan Neubauer
Downingia pusilla
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©2010 Vernon Smith
Downingia pusilla
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©2018 Neal Kramer
Downingia pusilla
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©2017 California Academy of Sciences
Downingia pusilla
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©2017 California Academy of Sciences

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Geographic subdivisions for Downingia pusilla:
s NCoRO, NCoRI, ScV, n&c SnJV, n SnFrB
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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 occurrence).






 

Data provided by the participants of the  Consortium of California Herbaria.

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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.
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CCH collections by month Flowering-Fruiting Monthly Counts

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).