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DROSERACEAE SUNDEW FAMILY

Elizabeth L. Painter & William J. Stone

Annual, perennial herb, [subshrub], carnivorous; roots weak. Leaf: generally basal rosette, often coiled in bud; blade with insect-catching hairs adaxially, hairs gland-tipped and sticky, [sensitive bristles]. Inflorescence: cyme, raceme-like, [flowers solitary]; flowers [1] few, on long peduncle. Flower: bisexual, radial; calyx lobes generally 5; petals generally 5, free or ± fused; stamens (4)5 [(10)20]; pistil 1, ovary superior, chamber 1, placentas generally 3(5), parietal, style generally 3(5), each generally 2-lobed. Fruit: capsule, loculicidal; valves generally 3(5). Seed: generally many, spindle-shaped.
3 genera (2 with 1 sp. each), 170+ species: temperate, tropics, especially Australia, South America, southern Africa; especially in bogs, swamps; some cultivated as novelties (Dionaea, Venus' fly-trap, of southeastern United States). —Scientific Editor: Thomas J. Rosatti.

DROSERA SUNDEW
Annual, perennial herb, often ± brown or ± red. Leaf: petiole long; adaxial blade hairs gland-tipped. Inflorescence: raceme-like cyme. Flower: sepals, petals, stamens generally 5; petals white, pink, or purple; styles, placentas, valves generally 3.
170+ species: range of family. (Greek: dewy) Insects and other organisms trapped by sticky fluid secreted by leaf glands are secured by leaf folding around them and digested by bacteria as well as additional leaf secretions (enzymes, ribonucleases), providing nutrition; many cultivated and/or non-native taxa, not all documented by specimens, persisting in North Coast (Mendocino Co., including Drosera tracyi Macfarl.), northern High Sierra Nevada (Plumas Co.) after reported, ill-advised plantings.
Unabridged note: Drosera aliciae Raym.-Hamet and Drosera capensis L. (North Coast; Mendocino Co.), and Drosera × hybrida Macf. (northern High Sierra Nevada; Plumas Co.), all documented by specimens, all persisting from reported, ill-advised plantings. Drosera binata Labill., Drosera burmanni Vahl, Drosera capillaris Poir., Drosera filiformis Raf., Drosera intermedia Hayne, Drosera nitidula Planch., Drosera occidentalis Morr., Drosera tracyi Macfarl., and Drosera slackii Cheek all have been reported in North Coast (Mendocino Co.) from similar plantings, but are not documented by specimens.

Key to Drosera

D. anglica Huds. ENGLISH SUNDEW
NATIVE
Perennial herb. Leaf: blade 15–50 mm, 2–7 mm wide. Inflorescence: peduncle generally 1, 6–25 cm. Flower: calyx 4–6 mm, ± 1/3 fused; petals 8–12 mm, white; style lobes 2, <= 2/3 to base. Seed: 1–1.5 mm, longitudinally striate-netted.
2n=40. Swamps, peatlands, often with Sphagnum; 1300–2000 m. Klamath Ranges, Cascade Range, n High Sierra Nevada (n of Lake Tahoe), s Warner Mountains; circumboreal. Leaves often especially long in California (Barry Rice, pers. comm.). Sterile hybrids with Drosera rotundifolia, generally more clumped than Drosera anglica but distinguished only by fruit, may be called Drosera ×obovata Mert. & W.D.J. Koch. Jun–Aug [Online Interchange] {CNPS list}
Unabridged note: Drosera longifolia L. rejected as ambiguous.

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 25 2014
Citation for this treatment: [Author of taxon treatment] 2013. Drosera, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=23475, accessed on Jul 25 2014

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click for enlargement Drosera anglica
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1982 Gary A. Monroe

Bioregions in which Drosera anglica occurs 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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CCH collections by month

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