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RANUNCULACEAE BUTTERCUP FAMILY

Margriet Wetherwax & Dieter H. Wilken, family description, key to genera

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.
± 60 genera, 1700 species: worldwide, especially northern temperate, tropical mountains; many ornamental (Adonis, Aquilegia, Clematis, Consolida, Delphinium, Helleborus, Nigella). some highly TOXIC (Aconitum, Actaea, Delphinium, Ranunculus). [Whittemore & Parfitt 1997 FNANM 3:85–271] Taxa of Isopyrum in TJM (1993) moved to Enemion; Kumlienia moved to Ranunculus. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Ranunculaceae

THALICTRUM MEADOW-RUE

Bruce D. Parfitt & Dieter H. Wilken

Perennial herb from caudex or rhizomes, generally glabrous; dioecious or flowers bisexual. Stem: 1–few, generally erect; branches 0 or few. Leaf: 1–4-ternate or pinnate, basal or basal and cauline, alternate, generally reduced distally on stem; leaflets wedge-shaped to ± round, entire, crenate, or lobed; pale green abaxially, generally green adaxially. Inflorescence: raceme or panicle, axillary or terminal, generally erect, ± scapose or not; bracts simple to 1-ternate; pedicels generally erect in fruit. Flower: sepals 4–5, ± green-white to ± purple, petal-like or not, generally early-deciduous; petals 0; stamens 8–many, generally > sepals, filaments flat or generally thread-like, anthers generally narrowly oblong, tip generally pointed; pistils (1)2–22. Fruit: achene, compressed laterally or not, ribbed or veined, beaked.
120–200 species: temperate North America, Eurasia, Africa; some ornamental, medicinal. (Greek: name given by Dioscorides, Greek physician-botanist) [Park & Festerling 1997 FNANM 3:258–271]

Key to Thalictrum

T. fendleri A. Gray
NATIVE
Plant 60–200 cm; generally dioecious. Leaf: basal and cauline, 7–46 cm; segments 8–20 mm, glabrous to finely glandular-puberulent. Inflorescence: panicle, bracts leaf-like proximally. Flower: sepals generally 4, 2–5 mm; stamens 15–28, filaments thread-like, anthers oblong-linear, acuminate. Fruit: 7–20, spreading to ascending; body 4–8 mm, ± compressed laterally, sides obliquely ± ovate or ± widely obovate to ± round, ribs 1–3, ± curved, veins 0–several, beak 1.5–4 mm. Plants in North Coast Ranges occasionally with bisexual flowers; varieties in California difficult, need study. [Online Interchange]
Unabridged note: Expanded author citation: Thalictrum fendleri Engelm. ex A. Gray

T. fendleri var. fendleri
NATIVE
Leaf: distal abaxially generally finely glandular-puberulent (at 20×). Fruit: body ± compressed throughout, sides obliquely ± ovate to ± obovate, 2–3-ribbed, veins 0.
2n=28,56,70. Moist, open to shaded places, woodland, forest; 500–3200 m. Klamath Ranges, Cascade Range (uncommon), Sierra Nevada, San Francisco Bay Area, Outer South Coast Ranges, Transverse Ranges, Peninsular Ranges, Great Basin Floristic Province; to Oregon, Wyoming, Texas, northern Mexico. May–Aug [Online Interchange]
Unabridged note: Expanded author citation: Thalictrum fendleri Engelm. ex A. Gray var. fendleri

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 26 2014
Citation for this treatment: [Author of taxon treatment] 2013. Thalictrum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=67036, accessed on Nov 26 2014

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click for enlargement Thalictrum fendleri var. fendleri
See CalPhotos for additional images
2001 Jeff Abbas

Geographic subdivisions indicated for the distribution of Thalictrum fendleri var. fendleri Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.