Marah fabacea
species of plant
Marah fabacea (sometimes spelled Marah fabaceus), the California manroot or bigroot, is the most common of the manroot species native to California. Its range throughout the state subsumes nearly the entire ranges of all the other California native manroots species and intergrades. Hybrids between California manroot and other species of Marah are common.
Foliage
Like other manroots, Marah fabacea has stout, hairy stems with tendrils. Vines appear in late winter in response to increased rainfall, and can climb or scramble to a length of 6 meters. Its leaves typically have five lobes with individual plants showing wide variation in leaf size and lobe length.
Vines emerge from a large, hard tuberous root which can reach several meters in length and weigh in excess of 100 kilograms. Newly exposed tubers can be seen along roadcuts or eroded slopes and have a scaley, tan-colored surface. Injured or decaying tubers take on a golden or orange color.
Flower
The flower can vary in color from yellowish green to cream to white.
“Marah fabacea” enters the record as species of plant. Crown Archives preserves that source wording while asking what Marah, fabacea and species can confirm, complicate or overturn.
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“Marah fabacea” is worth following because a concise public description often conceals a longer documentary argument. Here, Marah, fabacea and species provides the most credible route into that argument.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Sep 8, 2025. The linked authority identifier is Q17430123. None of the 0 selected statements returned an explicit reference.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Marah fabacea” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.