Jepson Flora Project: Jepson Interchange    

 
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

MYRTACEAE

MYRTLE FAMILY

Elizabeth McClintock

Tree, shrub, evergreen
Leaves simple, opposite or alternate, entire, often gland-dotted
Inflorescence: umbel, panicle of umbels, or flowers 1–3 in axils
Flower generally bisexual, radial; hypanthium cylindric, deltate, ± cup-shaped, or urn-shaped; sepals, petals generally 4–5, free or sometimes fused together to form a deciduous bud cap; stamens generally many, ± showy, borne near top of hypanthium, free or in 4–5 clusters; ovary generally inferior, chambers 1–many, style 1
Fruit: generally berry or capsule
Seeds generally many, small
Genera in family: ± 100 genera, 3000 species: tropical, subtropical, especially s hemisphere; economically important for timber (Eucalyptus ), spices (Syzygium aromaticum , cloves; Pimenta dioica , allspice), edible fruits (Psidium guajava , guava; Feijoa sellowiana , pineapple guava), many ornamental
Reference: [Wilson 1960 J Arnold Arbor 41:270–278]

EUCALYPTUS

GUM TREE

Tree, shrub
Stem generally erect; bark persistent toward base or not, rough, otherwise generally shed, leaving trunk smooth; twigs generally round
Leaves: juvenile opposite, often sessile, sometimes glaucous; adult alternate, petioled, generally narrower, > juvenile
Inflorescence: umbel or panicle of umbels, 3–many-flowered; flowers rarely solitary in axils
Flower: sepals, petals 4–5, fused into a deciduous, generally smooth bud cap; stamens generally white, yellow, pink, or red; ovary chambers 2–7, style < stamens
Fruit: capsule, woody, flat, opening at top
Species in genus: ± 500 species: Australia
Etymology: (Greek: well covered, from deciduous flower bud cap)
Reference: [Chippendale 1988 Fl Australia 19]
Many species cultivated in CA.

Introduced

E. polyanthemos Schauer

SILVER DOLLAR GUM, RED BOX


Stem < 25 m; bark fibrous, persistent or shed in flakes or irregular strips; trunk ± smooth, mottled gray or tan
Leaf: adult 5–10 cm, 1.5–5 cm wide, generally round to lanceolate-ovate, gray-green
Inflorescence: panicle of 3–6-flowered umbels
Flower: hypanthium ± 3 mm, deltate, ± 2 X bud cap; bud cap conic; stamens white
Fruit 5–6 mm, pear- to bowl-shaped; valves included
Ecology: Uncommon. Disturbed coastal, urban areas
Elevation: < 200 m.
Bioregional distribution: San Joaquin Valley, San Francisco Bay Area, South Coast, Western Transverse Ranges
Distribution outside California: native to Australia
Branches with juvenile, rounded, glaucous leaves used in floral arrangements.

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