Common Name: BUTTERCUP FAMILY Habit: Annual, perennial herb, woody vine [shrub], occasionally aquatic. Leaf: generally basal and cauline, alternate or opposite, simple or compound; petioles at base generally flat, occasionally sheathing or stipule-like. Inflorescence: cyme, raceme, panicle, or flowers 1. Flower: generally bisexual, generally radial; sepals 3--6(20), free, early-deciduous or withering in fruit, generally green; petals 0--many, generally free; stamens generally 5--many, staminodes generally 0; pistils 1--many, ovary superior, chamber 1, style 0--1, generally +- persistent as beak, ovules 1--many. Fruit: achene, follicle, berry, +- utricle in Trautvetteria, in aggregate or not, 1--many-seeded. Genera In Family: +- 60 genera, 1700 species: worldwide, especially northern temperate, tropical mountains; many ornamental (Adonis, Aquilegia, Clematis, Consolida, Delphinium, Helleborus, Nigella). Toxicity: some highly TOXIC (Aconitum, Actaea, Delphinium, Ranunculus). Note: Taxa of Isopyrum in TJM (1993) moved to Enemion; Kumlienia moved to Ranunculus. eFlora Treatment Author: Margriet Wetherwax & Dieter H. Wilken, family description, key to genera Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Common Name: BUTTERCUP Habit: Annual to perennial herb, occasionally from stolons or caudices, terrestrial or aquatic; roots generally fibrous. Stem: prostrate to erect. Leaf: basal, cauline, or both, alternate, generally reduced upward; petiole base flat, stipule-like or not; basal, proximal cauline petioles generally long; blades simple to dissected or compound, entire to toothed. Inflorescence: cyme, axillary or terminal, 1--few-flowered. Flower: sepals 3--5(6), generally early-deciduous, generally green to yellow or purple; petals 0--17[(150)], shiny, generally yellow, occasionally white or purple, nectaries near base, pocket-like or with flap-like scale; anthers yellow; pistils generally many. Fruit: achene, compressed or not, +- spheric, disk-like (width 3--15 × depth), or lenticular (width 1--2 × depth), beaked. Etymology: (Latin: diminutive of Rana, frog, from wet habitats) eFlora Treatment Author: Alan T. Whittemore
Ranunculus pusillus Poir.
NATIVE Habit: Perennial herb 8--50 cm, erect or ascending, rooting at most proximal nodes. Leaf: simple, unlobed, lower cauline 1.2--4.2 cm, 0.5--1.2 cm wide, ovate or lanceolate, base acute to truncate, margin entire or minutely dentate, tip acuminate to rounded. Inflorescence: bracts linear to lanceolate or oblanceolate. Flower: receptacle glabrous; sepals 4--5, spreading or reflexed from base, 1.5--3 mm, 1--1.5 mm wide, early-deciduous; petals 1--3, 1.5--2 mm, 0.5--1 mm wide. Fruit: body 1--1.2 mm, 0.6--0.8 mm wide, lenticular, wall thick, smooth, beak +- rudimentary, < 0.1 mm. Ecology: Ditches, streams, wet meadows, fields; Elevation: < 500 m. Bioregional Distribution: NCo, NCoRO, ScV, c SNF, CCo; Distribution Outside California: eastern United States. Flowering Time: Apr--Jun Jepson eFlora Author: Alan T. Whittemore Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Previous taxon: Ranunculus populago Next taxon: Ranunculus repens
Botanical illustration including Ranunculus pusillus
Citation for this treatment: Alan T. Whittemore 2012, Ranunculus pusillus, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=40958, accessed on April 18, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 18, 2024.
No expert verified images found for Ranunculus pusillus.
Geographic subdivisions for Ranunculus pusillus:
NCo, NCoRO, ScV, c SNF, CCo
MAP CONTROLS 1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
(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.
MAP LEGEND 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.
READ ABOUT YELLOW FLAGS
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).
