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Vascular Plants of California
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Eucalyptus polyanthemos
SILVER DOLLAR GUM, RED BOX


Higher Taxonomy
Family: MyrtaceaeView DescriptionDichotomous Key
Common Name: MYRTLE FAMILY
Habit: [Subshrub] shrub, tree, trunk bark smooth or scaly; glands 0 or embedded in epidermis. Leaf: opposite or alternate, persistent, generally glandular when young. Inflorescence: generally axillary, raceme, panicle, cyme, or flowers 1. Flower: generally bisexual, parts in 4s, 5s, generally +- white; hypanthium exceeding ovary or not; stamens generally many; ovary [rarely superior to] inferior, 2--5(18)-chambered; placentas axillary, just below top, or basal, ovules few to many, generally in 2--many series. Fruit: berry, capsule, nut. Seed: 1--many; coat membranous to +- leathery or hard, bony; embryo starchy or oily (of great taxonomic importance).
Genera In Family: 100 genera, +- 3500 species: many species tropical America, Australasia, fewer Africa, southern Asia; economically important for timber (Eucalyptus), spices (Syzygium aromaticum (L.) Merr. & L.M. Perry, cloves; Pimenta dioica (L.) Merr., allspice), edible fruits (Psidium guajava L., guava; Acca sellowiana (O. Berg) Burret, pineapple guava), many orns (Eucalyptus, Melaleuca, several other genera). Note: Apparently of Gondwanan origins; tropics, subtropics, Mediterranean climates. Chamelaucium uncinatum Schauer, Luma apiculata (DC.) Burret, Melaleuca citrina (Curtis) Dum.Cours., Myrtus communis L., Syzygium australe (Link) B. Hyland are waifs.
eFlora Treatment Author: Leslie R. Landrum, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: EucalyptusView DescriptionDichotomous Key


Common Name: EUCALYPTUS, GUM TREE
Habit: Tree, shrub. Stem: generally erect; bark shedding, smooth, or persistent near base (occasionally) or throughout, rough; twigs generally round. Leaf: juvenile generally opposite, horizontal, sessile, +- cordate, entire, glaucous; adult generally alternate, vertical, petioled, +- lanceolate, entire, glandular, glabrous, generally same color on both sides. Inflorescence: axillary, (1)3--many-flowered, stalked umbel or panicle-like cluster of such umbels. Flower: perianth (generally, entirety of calyx lobes, petals) fused into bud cap in bud, bud cap shed at flower; stamens many, in several series, generally all fertile, white (yellow, red, pink); ovary chambers 3--6, fused to hypanthium. Fruit: capsule, thick-walled, woody, generally smooth, generally dehiscing at top. Seed: generally 1--3 mm, wind-dispersed.
Species In Genus: +- 700 species: most endemic to Australia; > 250 species cult in California; important for oils, tannins, timber, orns. Etymology: (Greek: true cap, for bud cap) Note: World's largest flowering plants, some > 100 m; Eucalyptus pulverulenta Sims excluded, cultivated only.
eFlora Treatment Author: Matt Ritter
Reference: Brooker 2000 Austral Syst Bot 13:79--148
Eucalyptus polyanthemos Schauer
NATURALIZED
Stem: < 25 m; bark highly varied, rough, fibrous, persistent or smooth, shed in flakes or irregular strips, gray or tan. Leaf: 5--10 cm, 1.5--5 cm wide, round, elliptic, or ovate, gray-green, silver, or blue-green, occasionally glaucous. Inflorescence: terminal or axillary panicle of 5--7 flowered umbels. Flower: hypanthium +- 4 mm, ovoid to obconic, +- 2 × bud cap; bud cap conic to hemispheric; stamens white. Fruit: 5--6 mm, pear- to bowl-shaped; valves included.
Ecology: Uncommon. Disturbed coastal areas; Elevation: < 200 m. Bioregional Distribution: SnJV, CCo, SnFrB, SCoRO, SCo, s ChI (Santa Catalina Island), WTR; Distribution Outside California: native to southeastern Australia. Flowering Time: Dec--Feb Note: Commonly cultivated in California; often juvenile, adult, and transitional leaves in mature crowns of naturalized plants; juvenile leaves used in floral arrangements.
Jepson eFlora Author: Matt Ritter
Reference: Brooker 2000 Austral Syst Bot 13:79--148
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Citation for this treatment: Matt Ritter 2012, Eucalyptus polyanthemos, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=25275, accessed on May 19, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on May 19, 2019.

No expert verified images found for Eucalyptus polyanthemos.



Geographic subdivisions for Eucalyptus polyanthemos:
SnJV, CCo, SnFrB, SCoRO, SCo, s ChI (Santa Catalina Island), WTR
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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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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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.