Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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RANUNCULACEAE

BUTTERCUP FAMILY

Dieter H. Wilken, except as specified

Annual, perennial herb, sometimes aquatic
Leaves generally basal and cauline, generally alternate, simple or compound; petioles at base generally flat, sometimes sheathing or stipule-like
Inflorescence: cyme, raceme, panicle, or flowers solitary
Flower generally bisexual, radial; sepals generally 5, free, early deciduous or withering in fruit, generally green; petals 0–many, free; stamens generally 10–many; pistils 1–many, ovary superior, chamber 1, style 1, generally ± persistent in fruit as beak, ovules 1–many
Fruit: achene, follicle, berry, or utricle-like, 1–many-seeded
Genera in family: ± 60 genera, 1700 species: worldwide, especially n temp, tropical mtns; many ornamental (Adonis, Aquilegia, Clematis, Consolida, Delphinium, Erianthis, Helleborus ), some highly TOXIC (Aconitum, Actaea, Delphinium, Ranunculus )
Reference: [Duncan & Keener 1991 Phytologia 70:24–27]

THALICTRUM

MEADOW-RUE

Perennial from caudex or rhizomes, dioecious or flowers bisexual, generally glabrous
Stems 1–few, generally erect; branches 0 or few
Leaves generally 1–4-ternate, basal or basal and cauline, generally reduced upwards, petioled; segments wedge-shaped, fan-shaped, or ± round; upper surface generally green; lower surface pale green
Inflorescence: raceme or panicle, axillary or terminal, generally erect; pedicels generally erect in fruit; bracts simple to 1-ternate
Flower radial; sepals 4–5, generally green, petal-like or not, often early deciduous; petals 0; stamens 8–many, generally > sepals, anthers generally narrowly oblong, tip generally abruptly pointed, filaments generally thread-like; pistils 2–20
Fruit: achenes, compressed laterally to not, ribbed or veined, beaked
Species in genus: ± 80 species: temp North America, Eurasia, Africa; some ornamental, medicinal
Etymology: (Greek: name given by Dioscorides, Greek physician-botanist)
Reference: [Boivin 1944 Rhodora 46:337–377,391–445,453–487]

Native

T. fendleri A. Gray

Plant 60–200 cm, generally dioecious
Leaves basal and cauline, 7–46 cm; segments 8–20 mm, glabrous to finely glandular-puberulent, tip acute to rounded
Inflorescence: panicle, leafy to bracted above
Flower: sepals generally 4, 2–5 mm, greenish white to purplish; stamens 15–28
Fruits 7–20, spreading to ascending; body 4–8 mm, side with 1–3 ± curved ribs, 0 or several wavy veins
Ecology: Moist, open to shaded places, woodland, forest
Elevation: < 3200 m.
Bioregional distribution: California Floristic Province (except Great Central Valley, South Coast, Channel Islands), Great Basin Floristic Province
Distribution outside California: to Washington, Wyoming, Texas, n Mexico
Some plants in NCoR have some bisexual flowers; vars. in CA difficult, need study.

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bioregional map for THALICTRUM%20fendleri being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Thalictrum fendleri
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