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Perennial herb, woody vine, [shrub], rhizomed, aromatic. Stem: branched, occasionally ± underground. Leaf: simple, basal, cauline, or arising from rhizome, alternate; blade generally cordate, entire. Inflorescence: flower generally 1, axillary or terminal. Flower: bisexual, radial or bilateral; sepals 3, free or fused; petals generally 0; stamens generally 6 or 12, free or fused to style; pistil generally 1, ovary ± or partly inferior, chambers generally 6. Fruit: generally capsule. Seed: many.
5–8 genera, ± 500 species: mainly tropics, warm temperate; some cultivated (Aristolochia, Asarum, Saruma). [Neinhaus et al. 2005 Plant Syst Evol 250:7–26] —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.
Key to Aristolochiaceae
Rhizome shallowly horizontal or deeply ± vertical, plants spreading or clumped; roots gingery-aromatic. Leaf: from rhizome, generally evergreen; blade cordate to reniform. Inflorescence: flower terminal, at ground level. Flower: generally dark colored; sepals forming tube, persistent; stamens 12, free from style, tips generally appendaged. Fruit: fleshy capsule. Seed: with fleshy appendage, ant-dispersed.Key to Asarum
90 species: northern temperate. (Greek: derivation unknown) [Kelly 2001 Syst Bot 26:17–53]
Plants generally spreading, forming loose mat; rhizomes near soil surface, horizontal. Leaf: blade all green. Inflorescence: peduncle reflexed in flower. Flower: calyx lobes 0.8–1.5 cm, strongly reflexed in flower, obtuse to acute or abruptly pointed, red, tube white inside, generally not striped (or partial median stripe); stamen tip < pollen sacs.
2n=26. Shady wet places; 1000–1900 m. s High Cascade Range (Powellton, Butte Co.), High Sierra Nevada. May–Sep [Online Interchange]
Previous taxon: Asarum hartwegii
Next taxon: Asarum marmoratum
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 21 2014
Citation for this treatment: [Author of taxon treatment] 2013. Asarum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=14337, accessed on Nov 21 2014
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Gerald and Buff Corsi © 1999 California Academy of Sciences
|Geographic subdivisions indicated for the distribution of Asarum lemmonii|| 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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(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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