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Vascular Plants of California
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Citrullus lanatus var. citroides
WILD WATERMELON


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: CitrullusView Description 


Habit: Annual. Stem: +- hairy; tendril branched. Leaf: deeply, +- palmately lobed; 1° lobes +- pinnately lobed. Inflorescence: staminate, pistillate flowers 1, at different nodes. Flower: corolla generally < 3 cm wide, rotate or shallowly cup-shaped, yellow, deeply 5-lobed, fused part < 1 cm; anthers 3, free; stigmas 3, reniform. Fruit: melon-like, indehiscent, spheric to oblong; rind hard, smooth. Seed: many, +- 1 cm.
Species In Genus: 4 species: Africa, southern Asia, Europe. Etymology: (Latin: diminutive of citrus)
Reference: Dane & Liu 2007 Genet Resources Crop Evol 54:1255--1265
Unabridged Reference: McVaugh 2001 Citrullus In W.R. Anderson (ed), Flora Novo-Galiciana 3:502--503, Univ Michigan Herbarium, Ann Arbor, Michigan
Citrullus lanatus (Thunb.) Matsum. & Nakai var. citroides (L.H. Bailey) Mansf.
NATURALIZED
Fruit: large, green, generally striped or mottled with darker green; pulp white. Seed: white to black. Chromosomes: 2n=22.
Ecology: Disturbed areas; Elevation: < 300 m. Bioregional Distribution: SW, DMoj; Distribution Outside California: western Mexico; native to southern Africa. Flowering Time: May--Aug Note: Citrullus lanatus var. caffrorum (Alef.) Fosberg evidently has priority and so would be correct name; widely cultivated; hybridizes with Citrullus colocynthis (L.) Schrad.; Citrullus lanatus var. lanatus, cultivated watermelon, often escaped but not naturalized in California.
Synonyms: Citrullus colocynthis (L.) Schrad. var. lanatus (Thunb.) Matsum. & Nakai, ined.; Citrullus vulgaris Schrad. ex Eckl. & Zeyh., in part
Jepson eFlora Author: John M. Miller & Robert L. Schlising
Reference: Dane & Liu 2007 Genet Resources Crop Evol 54:1255--1265
Unabridged Reference: McVaugh 2001 Citrullus In W.R. Anderson (ed), Flora Novo-Galiciana 3:502--503, Univ Michigan Herbarium, Ann Arbor, Michigan
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Citation for this treatment: John M. Miller & Robert L. Schlising 2012, Citrullus lanatus var. citroides, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=56575, accessed on December 15, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on December 15, 2019.

Citrullus lanatus var. citroides
click for enlargement
© 2010 Barry Breckling
Citrullus lanatus var. citroides
click for enlargement
© 2010 Barry Breckling
Citrullus lanatus var. citroides
click for enlargement
© 2010 Barry Breckling

More photos of Citrullus lanatus var. citroides in CalPhotos



Geographic subdivisions for Citrullus lanatus var. citroides:
SW, DMoj
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map of distribution 1
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.