Jepson eFlora: Taxon page
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Morus alba

Higher Taxonomy
Family: MoraceaeView DescriptionDichotomous Key

Habit: [Perennial herb] shrub, [vine] tree, generally with milky juice; monoecious or dioecious. Leaf: alternate [opposite], petioled, generally simple, entire to lobed, evergreen or deciduous; stipules present. Inflorescence: raceme, spike, head, or flowers enclosed in thick receptacle, axillary. Flower: unisexual or bisexual, small, +- radial; sepals generally 4, free or fused at base; petals 0; stamens generally 4, opposite sepals; ovary generally superior, 1-chambered, style simple or 2-parted. Fruit: achenes many within fleshy calyces or surrounded by fleshy inflorescence receptacle.
Genera In Family: 37 genera, 1100 species: tropics, subtropics, some temperate; many cultivated (Ficus, fig; Artocarpus, breadfruit, jackfruit; Morus, mulberry). Note: Insect- or wind-pollinated.
eFlora Treatment Author: Alan T. Whittemore & Elizabeth McClintock
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: MorusView Description 

Common Name: MULBERRY
Habit: Tree, unarmed; monoecious or dioecious. Stem: buds scaly; stipule scars obscure, not encircling stem. Leaf: alternate, occasionally clustered with inflorescences, unlobed or 3--5-lobed, toothed, 3--5-veined from base, deciduous. Inflorescence: catkins, +- pendent, peduncled. Pistillate Flower: style deeply 2-parted. Fruit: of many achenes within fleshy calyces, resembling blackberries.
Species In Genus: +- 20 species: temperate, warm temp northern hemisphere. Etymology: (Latin: mulberry) Note: Wind-pollinated; Morus nigra, black mulberry, waif in urban areas.

Morus alba L.
Habit: Plant 10--15 m. Leaf: petiole 5--35 mm; blade 5--12 cm, ovate, coarsely toothed, abaxially glabrous or hairy only in axils of and on major veins, largest lobes generally 0--3, occasionally on 1 side, shallow to deep. Fruit: 1--2.5 cm, fleshy, white to +- pink or red-black.
Ecology: Disturbed areas, moist soil, streambanks; Elevation: < 1300 m. Bioregional Distribution: SNF, GV, WTR; Distribution Outside California: native to China. Flowering Time: Mar--May Note: Widely cultivated; fruit edible; leaves food of silkworm larva.
eFlora Treatment Author: Alan T. Whittemore & Elizabeth McClintock
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Citation for this treatment: Alan T. Whittemore & Elizabeth McClintock 2016. Morus alba, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 29, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 29, 2016.

Geographic subdivisions for Morus alba:
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.
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.