All Floras      Advanced Search
FOC Vol. 13 Page 321 Login | eFloras Home | Help
FOC | Family List | FOC Vol. 13 | Myrtaceae

1. Eucalyptus L’Héritier, Sert. Angl. 18. 1789.

桉属 an shu

Corymbia K. D. Hill & L. A. S. Johnson.

Trees or shrubs. Bark smooth, fibrous, stringy, or tessellated. Leaves usually polymorphic with different juvenile and mature forms and sometimes with intermediate forms. Juvenile leaves opposite, 3 to several pairs, shortly petiolate or sessile; leaf blade

often glaucous or with glandular trichomes; juvenile foliage sometimes persisting throughout life of plant. Mature leaves alternate, petiolate; leaf blade usually leathery, secondary veins numerous, with intramarginal veins. Inflorescences axillary or clustered into terminal or axillary panicles, consisting of umbelliform condensed dichasia. Flowers bisexual. Hypanthium campanulate, obconic, or semiglobose, stipitate or not, apex usually truncate. Sepals rarely distinct. Petals connate, either adnate to sepals into a 1-layered calyptra or not adnate and then with connate sepals forming a 2-layered calyptra; calyptra deciduous at anthesis. Stamens numerous, usually distinct, in several whorls with outer whorl usually sterile; anthers 2-celled, parallel or oblique, elliptic, ovate, cordate, or bifurcate, dehiscing longitudinally or occasionally poricidally. Ovary adnate to hypanthium, 2-7-loculed; ovules numerous. Style persistent. Whole or most of capsule included in expanded hypanthium; disk often well developed; valves exserted from hypanthium, equaling hypanthium rim, or included in hypanthium. Seeds numerous, many sterile and undeveloped, developed seeds ovate or angular; testa rigid, sometimes developed into wings.

About 700 species: mainly in Australia, with a minor representation in Indonesia, Papua New Guinea, and the Philippines; about 110 species cultivated in China with only 25 major ones treated here.

The genus is treated here in the broad sense, i.e., the segregate Corymbia is not recognized.

In addition to the Eucalyptus species treated here, the following additional taxa have been recorded as being cultivated in China (see Wang & Brooker, A key to eucalypts in China, China Science and Technology Press, Beijing, 1991):

E. acaciiformis H. Deane & Maiden

E. agglomerata Maiden

E. aggregata H. Deane & Maiden

E. albens Bentham

E. amygdalina Labillardière (E. salicifolia (Solander) Cavanilles)

E. badjensis Beuzeville & Welch

E. bakeri Maiden

E. benthamii Maiden & Cambage

E. bosistoana F. Mueller

E. brassiana S. T. Blake

E. bridgesiana R. Baker

E. camphora R. Baker

E. cinerea F. Mueller ex Bentham

E. cladocalyx F. Mueller

E. cloeziana F. Mueller

E. coccifera J. D. Hooker

E. coolabah Blakely & Jacobs

E. cordata Labillardière

E. cornuta Labillardière

E. crawfordii Maiden & Blakely

E. crenulata Blakely & Beuzeville

E. cypellocarpa L. A. S. Johnson

E. dalrympleana Maiden

E. dealbata A. Cunningham ex Schauer

E. deanei Maiden

E. deglupta Blume

E. delegatensis R. Baker

E. dendromorpha (Blakely) L. A. S. Johnson & Blaxell

E. diversicolor F. Mueller

E. dives Schauer

E. drepanophylla F. Mueller ex Bentham

E. dundasii Maiden

E. dunnii Maiden

E. elata Dehnhardt

E. eugenioides Sieber ex Sprengel

E. fastigiata H. Deane & Maiden

E. fibrosa F. Mueller

E. ficifolia F. Mueller

E. fraxinoides H. Deane & Maiden

E. glaucescens Maiden & Blakely

E. globoidea Blakely

E. gomphocephala Candolle

E. goniocalyx F. Mueller ex Miquel

E. gummifera (Solander ex Gaertner) Hochreutiner

E. gunnii J. D. Hooker

E. horistes L. A. S. Johnson & K. D. Hill

E. intermedia R. Baker

E. ×kirtoniana F. Mueller

E. kochii Maiden & Blakely

E. laevopinea R. Baker

E. leucoxylon F. Mueller

E. longifolia Link

E. macarthurii H. Deane & Maiden

E. mannifera Mudie

E. marginata Donn ex Smith

E. melanoxylon Maiden

E. microtheca F. Mueller

E. miniata Cunningham ex Schauer

E. neglecta Maiden

E. nitens (H. Deane & Maiden) Maiden

E. nova-anglica H. Deane & Maiden

E. occidentalis Endlicher

E. ovata Labillardière

E. paliformis L. A. S. Johnson & Blaxell

E. papuana F. Mueller

E. parramattensis C. Hall

E. parvifolia Cambage

E. pauciflora Sieber ex Sprengel

E. peltata Bentham

E. perriniana F. Mueller ex Rodway

E. pilularis Smith

E. polybractea R. Baker

E. propinqua H. Deane & Maiden

E. pulverulenta Sims

E. pyrocarpa L. A. S. Johnson & Blaxell

E. quadrangulata H. Deane & Maiden

E. radiata Sieber ex Candolle

E. regnans F. Mueller

E. resinifera Smith

E. rubida H. Deane & Maiden

E. scoparia Maiden

E. seeana Maiden

E. smithii R. Baker

E. stellulata Sieber ex Candolle

E. stricta Sieber ex Sprengel

E. tessellaris F. Mueller

E. triantha Link

E. triflora (Maiden) Blakely

E. urophylla S. T. Blake

E. viminalis Labillardière

1 Bark smooth essentially throughout, exfoliating   (2)
+ Bark on trunk and branches rough or fibrous, persistent, sometimes only on basal part of trunk and then apically smooth and exfoliating   (14)
2 (1) Valves of capsule included in hypanthium rim; inflorescences terminal, paniculate   (3)
+ Valves of capsule exserted or equaling hypanthium rim; inflorescences axillary, simple   (6)
3 (2) Capsule 4-5 mm in diam..   23 E. polyanthemos
+ Capsule 8-13 mm in diam   (4)
4 (3) Mature leaf blade ovate, pubescent; capsule globose.   1 E. torelliana
+ Mature leaf blade lanceolate to narrowly lanceolate, glabrous; capsule pot-shaped to ovoid   (5)
5 (4) Leaves with strong lemon smell; bark grayish blue.   2 E. citriodora
+ Leaves only with weak odor; bark with grayish yellow maculae.   3 E. maculata
6 (2) Hypanthium in flower and fruit 4-ridged.   18 E. globulus
+ Hypanthium not ridged or 2-ridged   (7)
7 (6) Leaf blade of mature trees rounded to broadly ovate.   14 E. platyphylla
+ Leaf blade of mature trees lanceolate or narrowly lanceolate   (8)
8 (7) Calyptra awl-shaped   (9)
+ Calyptra conic, rostrate, or semiglobose   (11)
9 (8) Peduncle terete.   13 E. blakelyi
+ Peduncle compressed, flattened, or ridged   (10)
10 (9) Hypanthium campanulate, 5-6 mm.   4 E. punctata
+ Hypanthium semiglobose, ca. 3 mm.   11 E. amplifolia
11 (8) Peduncle terete   (12)
+ Peduncle compressed   (13)
12 (11) Calyptra acutely conic.   10 E. tereticornis
+ Calyptra rostrate or obtusely conic.   12 E. camaldulensis
13 (11) Capsule pyriform to awl-shaped.   5 E. grandis
+ Capsule semiglobose to bowl-shaped.   15 E. alba
14 (1) Inflorescence paniculate, terminal or sometimes axillary and then reduced in complexity   (15)
+ Inflorescence simple, axillary   (20)
15 (14) Disk of fruiting hypanthium narrow or obscure   (16)
+ Disk of fruiting hypanthium broad or moderately broad   (18)
16 (15) Hypanthium 6-8 mm excluding stipe; leaf blade 2-3 cm wide.   24 E. paniculata
+ Hypanthium 2-3 mm excluding stipe; leaf blade 1-1.8 cm wide   (17)
17 (16) Capsule truncately capitate-ovoid.   21 E. largiflorens
+ Capsule campanulate.   22 E. crebra
18 (15) Calyptra semiglobose.   19 E. microcorys
+ Calyptra awl-shaped   (19)
19 (18) Flower buds spindle-shaped.   20 E. leptophleba
+ Flower buds obovoid.   23 E. polyanthemos
20 (14) Valves of capsule included or equaling hypanthium rim   (21)
+ Valves of capsule exserted from hypanthium rim   (23)
21 (20) Disk of fruiting hypanthium narrow.   25 E. melliodora
+ Disk of fruiting hypanthium broad or moderately broad   (22)
22 (21) Capsule pot-shaped, sometimes ± constricted in middle, 1-1.5 cm.   8 E. robusta
+ Capsule campanulate to obconic, 6-8 mm.   9 E. botryoides
23 (20) Capsule 1.2-1.5 cm in diam..   7 E. pellita
+ Capsule 0.5-0.9 cm in diam   (24)
24 (23) Peduncle compressed   (25)
+ Peduncle terete   (26)
25 (24) Calyptra semiglobose or conic.   5 E. grandis
+ Calyptra shortly pyramidally awl-shaped.   6 E. saligna
26 (24) Leaf blade secondary veins at an angle of 35°-45° from midvein; hypanthium semiglobose.   16 E. exserta
+ Leaf blade secondary veins at an angle of 55°-60° from midvein; hypanthium obconic.   17 E. rudis

  • List of lower taxa


    Related Objects  
  • Eucalyptus.pdf
  • PDF

  • Flora of China @
    Browse by
    Advanced Search

    Flora of China Home




     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |