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MORACEAE MULBERRY FAMILY

Alan T. Whittemore & Elizabeth McClintock

[Perennial] 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, subtrop, 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

MORUS MULBERRY
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 temp n hemisphere. (Latin: mulberry) [Whittemore 2006 Sida 22:769–775] Wind-pollinated; Morus nigra, black mulberry, waif in urban areas.

M. alba L. WHITE MULBERRY
NATURALIZED
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]
Unabridged note: The following (and possibly other) accessions, if verified, would represent range extensions (as indicated): RSA620447 (SNE); UCR33626 (se DMoj (Colorado River)); UCR75660 (SnBr); UCR117410, UCR132709, RSA702830, UCR117107 (SCo); RSA559473 (PR); RSA584382/UCR179663, RSA602049/UCR151021, RSA651731, RSA683140/UC1870288/UCR177757, RSA708247 (SnGb).

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occursRed area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon;
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 have georeferencing or identification issues.
map of distribution 1

Chart based on elevation range in Manual and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
Map made in collaboration with Scott Loarie. 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 Manual flowering time.