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Alan T. Whittemore & Elizabeth McClintock

[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.
37 genera, 1100 species: tropics, subtropics, some temperate; many cultivated (Ficus, fig; Artocarpus, breadfruit, jackfruit; Morus, mulberry). Insect- or wind-pollinated. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Moraceae

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.
± 20 species: temperate, warm temperate northern hemisphere. (Latin: mulberry) [Whittemore 2006 Sida 22:769–775] Wind-pollinated; Morus nigra, black mulberry, waif in urban areas.

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.
Disturbed areas, moist soil, streambanks; < 1300 m. Sierra Nevada Foothills, Great Central Valley, Western Transverse Ranges; native to China. Widely cultivated; fruit edible; leaves food of silkworm larva. Mar–May [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 27 2015
Citation for this treatment: [Author of taxon treatment] 2013. Morus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 27 2015

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click for enlargement Morus alba
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2005 Louis-M. Landry

Geographic subdivisions indicated for the distribution of 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.