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Myosotis scorpioides
WATER FORGET-ME-NOT


Higher Taxonomy
Family: BoraginaceaeView DescriptionDichotomous Key
Common Name: BORAGE FAMILY
Habit: Annual, perennial herb, or shrub, often bristly or sharp-hairy. Stem: prostrate-decumbent to erect. Leaf: basal and/or cauline, simple, generally alternate, sometimes opposite, especially at base. Inflorescence: cymes, arranged singly or in groups of 2--5, generally coiled in flower, generally elongating in fruit. Flower: bisexual, generally radial; sepals 5, free or fused at least at base; corolla 5-lobed, salverform, funnel-shaped, rotate, or bell-shaped, appendages (often called "fornices") 0 or 5 at top of tube, when present often differentially pigmented, alternate stamens; stamens epipetalous; ovary superior, 4-lobed, style 1, entire or minutely 2-lobed (2-branched). Fruit: nutlets 1--4, when > 1, all similar (often called "homomorphic") or 1 or 2 dissimilar in size and/or shape from the others (often called "heteromorphic"), free (fused), smooth to roughened, prickly or bristly or not.
Genera In Family: +- 90 genera, +- 1600--1700 species: mostly temperate, especially western North America, Mediterranean; some cultivated (Borago, Echium, Myosotis, Symphytum). Toxicity: Many genera may be TOXIC from pyrrolizidine alkaloids or accumulated nitrates. Note: Sometimes still treated in broader sense of TJM2 (e.g., APG IV 2016 Bot J Linn Soc 181:1--20), but recent evidence (Luebert et al. 2016) supports segregation, for our flora, of the families Ehretiaceae, Heliotropiaceae, Hydrophyllaceae, Lennoaceae, and Namaceae.
eFlora Treatment Author: Michael G. Simpson, C. Matt Guilliams, Kristen Hasenstab-Lehman & Ronald B. Kelley
Scientific Editor: Bruce G. Baldwin, C. Matt Guilliams, Kristen Hasenstab-Lehman, David J. Keil, Ronald B. Kelley, Robert W. Patterson, Thomas J. Rosatti & Michael G. Simpson
Genus: MyosotisView DescriptionDichotomous Key


Common Name: FORGET-ME-NOT
Habit: Annual to perennial herb, glabrous to rough-hairy; roots generally fibrous. Stem: decumbent to erect. Leaf: basal generally oblong or oblanceolate; cauline generally linear to elliptic. Inflorescence: generally raceme-like cymes, coiled, in age +- open; bracts 0 (leaf-like). Flower: calyx lobes 5, tube hairs appressed to spreading, hooked at tip or not; corolla salverform or wide-funnel-shaped, generally blue, white, or yellow, appendages prominent or not; stamens included; style generally included. Fruit: nutlets generally 4, +- lens-shaped, smooth, shiny, each with raised outer margin, attachment scar adaxially, at base, small.
Species In Genus: 50 species: temperate, boreal. Etymology: (Greek: mouse ear, from leaf) Note: Myosotis arvensis (L.) Hill reported from Orange Co., 1938, not persisting.
eFlora Treatment Author: Ronald B. Kelley & Elaine Joyal
Unabridged Reference: Grau 1964 Osterr Bot Zeitschr 111:561--617
Myosotis scorpioides L.
NATURALIZED
Habit: Perennial herb. Stem: 2--6 dm, generally unbranched, base often creeping or stolon-like; +- strigose. Leaf: 2.5--8 cm, 7--20 mm wide; basal oblanceolate; cauline oblong or elliptic to lance-elliptic. Inflorescence: bracts 0; pedicel in fruit spreading, +- >= calyx. Flower: calyx 3--5 mm, tube hairs sparse-appressed-strigose, not hooked at tip, lobes << tube, occasionally unequal, wide-triangular, in fruit < 6 mm; corolla 5--10 mm diam, blue, salverform, blue, appendages prominent, yellow. Fruit: nutlets > 1.5 mm, +- <= style, ovate, +- black, marginal rim obscure. Chromosomes: 2n=64.
Ecology: Shallow water, wet soil; Elevation: (75)1050--2100+ m. Bioregional Distribution: SNH, Wrn; Distribution Outside California: western Oregon, Washington, to eastern North America; native to Europe. Flowering Time: Jun--Aug Note: Other reported locations need documentation; most easily confused with Myosotis laxa.
Synonyms: Myosotis palustris (L.) Hill
Jepson eFlora Author: Ronald B. Kelley & Elaine Joyal
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Myosotis scorpioides

botanical illustration including Myosotis scorpioides

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Citation for this treatment: Ronald B. Kelley & Elaine Joyal 2012, Myosotis scorpioides, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=34214, accessed on August 14, 2022.

Citation for the whole project: Jepson Flora Project (eds.) 2022, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on August 14, 2022.

Myosotis scorpioides
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© 2005 Christopher L. Christie

More photos of Myosotis scorpioides in CalPhotos



Geographic subdivisions for Myosotis scorpioides:
SNH, Wrn
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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.
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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.
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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).