Flora of North America species comparison

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Maclura pomifera

Moraceae

bois d'arc, hedge-apple, Osage-orange

mulberry family
Habit Trees, to 20 m. Trees, shrubs, herbs, or vines, deciduous or evergreen, frequently with milky sap.
Bark

dark orange-brown, shallowly furrowed, ridges flat, often peeling into long, thin strips.

Branchlets

greenish yellow, becoming orange-brown;

thorns stout, straight, to 1.5 cm, usually lateral to spur branch, spur branches often paired.

Buds

often paired, larger one red-brown, globose, 1.5-2 mm;

scales ciliate;

leaf scars half round, bundle scars arranged in oval.

Leaves

blade 4-12 × 2-6 cm, base rounded, apex acuminate;

surfaces abaxially pale, glabrate, midrib and veins pubescent, adaxially lustrous, glabrous, midrib somewhat pubescent.

blade: margins entire, toothed, or lobed;

venation pinnate or with 3-5 basal palmate veins;

cystoliths often present in epidermal cells.
Inflorescences

racemes, cymes, or capitula.
Flowers

unisexual, staminate and pistillate on same or different plants, small, occasionally on flattened torus, more often enclosed within fleshy, flask-shaped receptacle (syconium);

sepals 2-6, distinct or partly connate (vestigial in Brosimum).
Staminate flowers

sepals distinct, yellow-green, ca. 1 mm, apex acute, pubescent;

filaments ca. 2 mm, closely appressed to sepals, flattened.

stamens equal in number to sepals or calyx lobes and opposite them, straight or inflexed;

anthers 1-2-locular.
Pistillate flowers

sepals green, obovate, 3 mm, enclosing and closely appressed to ovary, hoodlike, ciliate near tip;

ovary ovoid, compressed, ca. 1 mm;

style base green, ca. 3 mm, branches 4-6 mm, glabrous;

stigma yellowish, papillose.

sepals or calyx lobes 4, ± connate;

pistils 1, 1-2-carpellate;

ovary 1, superior or inferior, 1(-2)-locular;

ovules 1 per locule;

styles or style branches 1-2;

stigmas 1-2, entire.
Fruits

multiple (syncarps);

individual achenes or drupelets partly or completely enclosed by enlarged common receptacle or by individual calyces.
Seeds

cream colored, oval to oblong, 8-12 × 5-6 mm, base truncate or rounded with 1-3 minute points, margins with narrow groove, apex rounded, mucronate;

surfaces minutely striated or pitted.

Staminate

inflorescences clustered on lateral spur branches;

peduncle 1-1.5 cm, pubescent;

heads globose or cylindric, 1.3-2.3 cm;

pedicels 2-10 mm, glabrate.

Pistillate

inflorescences: peduncle 2-2.5 mm, glabrous or pubescent;

heads globose, sessile on obconic receptacle, to 1.5 cm diam.

Syncarps

yellow-green to green, spheric, surface irregular, exuding milky sap when broken, peduncle short, glabrous or pubescent;

achenes completely covered by accescent, thickened calyx lobes and deeply embedded in receptacle.

Maclura pomifera

Moraceae
Phenology Flowering spring.
Habitat Thickets
Elevation 0-1500 m (0-4900 ft)
Distribution
from FNA
AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; MI; MO; MS; NC; NE; NJ; NM; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; WI; WV
[WildflowerSearch map]
[BONAP county map]
Widespread in tropical and subtropical regions; less common in temperate areas
[BONAP county map]
Discussion

Maclura pomifera is native to southwestern Arkansas, southeastern Oklahoma, and Texas; it is introduced and naturalized elsewhere in the United States. Collections in California, Connecticut, Massachusetts, Rhode Island, and Washington appear to represent isolated escapes.

Maclura pomifera has been widely used in fencerows on farms and along roadways in the midwest and eastern states as windbreaks and wildlife shelter.

The Comanches used Maclura pomifera as an eye medication (D. E. Moerman 1986).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Genera ca. 40, species nearly 1100 (7 genera, 18 species in the flora).

Members of the large and diverse mulberry family are mainly woody and tropical; they are most abundant in Asia. The largest genera are Ficus, with approximately 750 species, and Dorstenia, with about 170 species. The family includes important timber trees, e.g., Chlorophora excelsa (Welwitsch) Bentham, iroko, from tropical Africa; Brosimum guianense (Aublet) Huber, letterwood, snakewood; and Ficus spp. Genera with species bearing edible fruits include the mulberries, Morus spp.; breadfruit and jackfruit, e.g., Artocarpus altilis (Parkinson) Fosberg and A. heterophyllus Lamarck; and figs, Ficus spp. Several species of Ficus are commonly cultivated in subtropical regions of the United States. These include F. carica Linnaeus; F. elastica Roxburgh ex Hornemann, India rubber plant; F. benghalensis Linnaeus, banyan; F. benjamina Linnaeus, weeping fig; F. pumila Linnaeus, creeping fig; and F. microcarpa Linnaeus f., Indian-laurel.

Rubber plants and weeping figs are commonly sold as houseplants. Economically, the most important species are those associated with the silk trade. Morus alba Linnaeus, M. indica Linnaeus, M. laevigata Wallis, and M. serrata Roxburgh, cultivated in many temperate and tropical countries, provide the natural food source for the silkworm, Bombyx mori Linnaeus.

Cudrania tricuspidata (Carrière) Bureau ex Lavallée, used as a food source for silkworms when Morus spp. are in short supply, is cultivated in North America as a hedge plant. The fruit is edible. Native to Korea and China, C. tricuspidata is known from a collection made in 1956 in McIntosh County, Georgia (S. B. Jones Jr. and N. C. Coile 1988), and it is naturalized in Orange County, North Carolina (R. D. Whetstone, pers. comm.).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Herbs.
→ 2
1. Trees, shrubs, or vines.
→ 3
2. Plants lacking evident aerial stems, rhizomatous, perennial; inflorescences axillary, long-pedunculate.
Dorstenia
2. Plants caulescent, taprooted, annual; inflorescences axillary, short-pedunculate.
Fatoua
3. Flowers all borne on inside of syconium; terminal vegetative bud surrounded by pair of stipules.
Ficus
3. Flowers not borne on inside of syconium or only a solitary female flower immersed in receptacle; terminal vegetative bud scaly, not surrounded by pair of stipules.
→ 4
4. Margins of leaf blade toothed, often lobed; venation appearing palmate, or weakly 3-veined from base.
→ 5
4. Margins of leaf blade entire, never lobed; venation pinnate.
→ 6
5. Pistillate inflorescences globose; styles unbranched.
Broussonetia
5. Pistillate inflorescences cylindric; styles 2-branched.
Morus
6. Leaf blade ovate to lanceolate, not leathery; trees deciduous; syncarps 8-12 cm diam.
Maclura
6. Leaf blade oblong, leathery; trees evergreen; syncarps 1.5 cm diam.
Brosimum
Source FNA vol. 3. FNA vol. 3, p. 388. Author: Richard P. Wunderlin.
Parent taxa Moraceae > Maclura
Subordinate taxa
Brosimum, Broussonetia, Dorstenia, Fatoua, Ficus, Maclura, Morus
Synonyms Ioxylon pomiferum, Ioxylon aurantiacum, M. aurantiaca
Name authority (Rafinesque) C. K. Schneider: Ill. Handb. Laubholzk. 1: 806. (1906) Link
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Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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