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Marah watsonii
TAW MAN-ROOT

Higher Taxonomy
Family: CucurbitaceaeView DescriptionDichotomous Key

Common Name: GOURD FAMILY
Habit: Annual, perennial herb; hairs often hard from calcium deposits; generally monoecious. Stem: trailing or climbing, 1--many; tendril generally 1 per node, often branched. Leaf: generally simple, alternate, generally palmate-lobed and -veined, petioled; stipules 0. Inflorescence: at nodes; staminate flowers in racemes, panicles, small clusters, (or 1); pistillate flowers generally 1. Flower: unisexual [bisexual], radial; hypanthium > ovary; calyx generally 5-lobed (or +- 0); corolla rotate to cup- or bell-shaped, generally 5-lobed; stamens 3--5 (or +- 1--3 from fusion), anthers twisted together, often > filaments; ovary +- inferior, chambers 3--5, placentas parietal, styles 1--3, stigmas generally lobed, large. Fruit: berry, drying or not, or capsule, irregularly dehiscent, often gourd- or melon-like. Seed: 1--many.
Genera In Family: 100 genera, 700 species: especially tropics; some cultivated (Citrullus, watermelon; Cucumis, cucumber; Cucurbita, gourd, pumpkin, squash; Luffa, loofah; Sechium, chayote). Note: Several cultivated species included Bryonia dioica reported as waifs in California (Howell 1958 Wasmann J Biol 16:1--157), but none recently.
eFlora Treatment Author: John M. Miller & Robert L. Schlising
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: MarahView DescriptionDichotomous Key

Common Name: MAN-ROOT, WILD CUCUMBER
Habit: Perennial herb; tuber large; occasionally temporarily dioecious. Stem: +- scabrous or hairy, glabrous in age; tendril branched. Leaf: +- round, +- cordate, +- 5--7-lobed. Inflorescence: staminate flowers in racemes or panicles (or 1 flower per node early); pistillate flower 1 per node, generally at same nodes as staminate. Flower: sepals 0; staminate flower 3--15 mm wide, rotate to cup-shaped, white to cream or yellow-green; stamens fused, anthers twisted together; stigma (pistillate flowers) 1, +- hemispheric. Fruit: capsule, irregular-dehiscent from tip, +- symmetric, 3--20 cm, spheric to ovate or oblong, +- prickly, beak << body or 0. Seed: 1--many, generally > 1 cm, +- ovate, +- flat.
Species In Genus: 7 species: western North America. Etymology: (Hebrew: bitter, from taste of all parts)
Unabridged Note: Sometimes included in Echinocystis.

Marah watsonii (Cogn.) Greene
NATIVE
Habit: Herbage glaucous. Flower: corolla generally < 8 mm wide, deeply cup-shaped, white. Fruit: 2--3.5 cm, +- spheric, often striped dark green; prickles +- 0 to dense, flexible, often hooked. Seed: 1--4, 11--14 mm, +- spheric.
Ecology: Shrubby areas, forest edges; Elevation: < 1200 m. Bioregional Distribution: KR, NCoRI, s CaR, n SN, ScV. Flowering Time: Mar--Apr
eFlora Treatment Author: John M. Miller & Robert L. Schlising
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Citation for this treatment: John M. Miller & Robert L. Schlising 2016. Marah watsonii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=32754, accessed on December 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 04, 2016.


Marah watsonii
click for enlargement
© 2008 Neal Kramer
Marah watsonii
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© 2009 Julie Kierstead Nelson
Marah watsonii
click for enlargement
© 2009 Julie Kierstead Nelson
Marah watsonii
click for enlargement
© 2009 Julie Kierstead Nelson
Marah watsonii
click for enlargement
© 2009 Julie Kierstead Nelson
Marah watsonii
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© 2015 Steve Matson

More photos of Marah watsonii in CalPhotos


Geographic subdivisions for Marah watsonii:
KR, NCoRI, s CaR, n SN, ScV.
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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.