Skip to main content

Earleaf acacia (Acacia auriculiformis)

Akasia or Papuan wattle or cormis or earpod wattle or earleaf acacia (Acacia auriculiformis) are acacia species in Fabaceae, endemic in Papua and Papua New Guinea, growing at an altitude of 0 to 400 meters above sea level at warm temperatures and able to live in rainfall is very low at 200 mm/year on soils pH 4-9.

A. auriculiformis grows well on damaged land and is able to fix nitrogen. Very tolerant of environmental stress, barren and marginal land, clay, high salinity or waterlogged. Evergreen tree despite the dry season where other plants have shed leaves. Growth of up to 30 meters and diameter of 80 cm.

Dlium Earleaf acacia (Acacia auriculiformis)

Akasia has a phylum where leaves are incomplete without leaf strands, but leaf stems will widen. Trees have phylaxis with scattered types where the phylogens bend like auricles which form the basis for identification of this species. Venation in the phyla is dominant in the longitudinal direction, 10-20 cm long and 2-6 cm wide.

Flowers are in the form of grains, short-stemmed and a grain can consist of 50-100 small yellow flowers. Grains have a length of 10-15 cm. The fruit in the pod contains 2-5 seeds, brownish black and shiny.

Growth

Cormis is a fast growing woody plant, suitable for forest restoration or planted in industrial plantations to produce large biomass in a short time. In Indonesia, wood production is 15-20 m3/ha/year for a 10-12 year rotation period.

Earleaf acacia is very useful to overcome various conditions of environmental stress, erosion and rehabilitation of marginal lands. The ability to bind nitrogen is able to fertilize the soil. The root is very strong for reclaiming hard areas that contain a lot of iron.



This tree is able to grow in areas with low to moderate rainfall (760-1670 mm/year), very acidic soil with a pH of 4 - 6.5, resistant to waterlogging in 6 months and resistant to repeated fire attacks. Papuan wattle also tolerates saline soils and is able to grow 2-3 times more than other Acacia species at the level of salt content of 1250 mol m-3.

The earpod wattle is very fast growing in the tropical and subhumid regions, the natural distribution in the dry savannah or on the edge of a moist river with a tree height of up to 30 m. In areas with sandy soil it grows to 10.6 m and diameter of 20.3 cm in 6 years with a distance of 1.8x1.8m (3000 trees/ha).

This species has been planted to increase the social and economic benefits of communities in various countries, fire support, control erosion and mixed crops in agroforestry activities, industrial waste processors and restoration of ex-mining land. The speed of growth is able to compete with weeds and is more resistant to termite attacks than Casuarina equisetifolia.

Wood character

A. auriculiformis has wood in the durability class III and strength classes between II and III, and specific gravity in the range 0.6-0.75. The chemical content of wood is α-cellulose, hemicellulose and extractive at 44.1%, 33.2%, 4.5%. At 3.5 years old, lignin showed 32.6% for sapwood and 41.4% for wood terrace.

Regeneration

Earleaf acacia is more easily regenerated using seeds. This type of flowering is very abundant and is often used for decoration along the highway. The abundance of these flowers produces very many seeds so that it is easy for breeding and regeneration to not experience many obstacles.

Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Clade: Mimosoideae
Genus: Acacia
Species: A. auriculiformis

Comments

Popular

Salak (Salacca zalacca)

Salak or snake fruit (Salacca zalacca) is a species of palm plant in Arecaceae, dioesis, shrubs and not trunked, has many thorns, many shoots, grows into dense and strong clumps, spreads below or above the ground, often branching and 10-15 cm diameter.

S. zalacca has compound leaves, pinnate and 3-7 m long. Petiole, midrib and sapling have many long thorns, thin spines and a blackish-gray color. Minor leaves have a lanceolate shape, a pointed tip, 8x85 cm and a white underside by a waxy coating.


The flowers in the cob are compound, appear in the armpit of the leaf, stem, initially covered by a sheath then dry and break down like fibers. Male flowers 50-100 cm long, 4-12 cylindrical items, 7-15 cm long, reddish in the armpits of tightly arranged scales. Female flowers 20-30 cm long, stemmed long and 1-3 items.

The fruit has scaly skin, is eaten and is known as a table fruit, triangular shaped rather rounded or inverted ovoid, pointed at the base and rounded at the tip, 2.5-10 cm long, w…

God is tools

God and spirit are controversial discussions in science and even mythology will have no place among naturalists and for Darwinians. Apparently this has been final that mythology is a delusional, mystical and superstitious concept that cannot be empirically proven in the world of science.

Most scientists and science activists have agreed that god is nonsense, delusional and cannot be accommodated in the theory of evolution. This opinion can be understood methodologically and I agree with the sentences. But so many behaviors are very real and occur in the field.


I am a fieldman who goes to the wild every day, along rice fields and forests to watch insects to plants, talk to people especially in villages, visit Hindu-Buddhist temples built in the 8th century, witnessing busyness in mosques, temples and churches.

I feel something is missing in the view of naturalists and Darwinians. There are short moments that are missed in analyzes in the timeline of human evolution. These little moment…

Devil's backbone (Euphorbia tithymaloides)

Pokok lipan or devil's-backbone or redbird flower or christmas candle or Pedilanthus tithymaloides (Euphorbia tithymaloides) are plant species in Euphorbiaceae, upright, evergreen, gummy shrubs, growing in tropical and subtropical regions.

E. tithymaloides likes sandy soils especially with high concentrations of boron, copper, iron, manganese, molybdenum and zinc. This bush grows to 2.4 m high and 61 cm wide. Simple angiosperm leaves, arranged opposite to the stem where each leaf is sessile with a length of 3.6-7.6 cm.


The stem has the tip of a handle that supports a group of flowers that are not scented. Bifid crown and ovoid. The involucral bracts are bright red, irregular in shape and length from 1.1 to 1.3 mm.

Hairy male and female pedicels. Seed pods are 7.6 mm long, 8.9 mm wide and ovate with clipped ends. Devil's-backbone generally blooms in mid-spring in the subtropical region and in the dry season in the tropics. Pollination is carried out by ants and birds.

Redbird fl…

Barbados lily (Hippeastrum puniceum)

Barbados lily or amaryllis lily (Hippeastrum puniceum) is a species of perennial flowering plant in Amaryllidaceae, grows in the tropics, has 4-6 leaves, bright green, 30-60 cm long and 2.5-3 cm wide, white waxed, tubular and shrink at the ends.

H. puniceum has flowers that grow in the umbel at the end of the stalk which has a height of 40-60 cm and stands tall with a pointed tip at the top. The umbel has lanceolate green bracts at its base. Each stalk has one or two ovaries.


Orange-red petal with yellow or pale base. The two lower tepals are much narrower than lateral. About five white stamens emerge from the end of the tube in the middle of the crown.

A single flower will bloom to face north or south with a curved base where the horizontal flower faces are parallel to the ground, while the stems that have two flowers will bloom to face north and others to the south.

Wild barbados lilies grow in forests, yard, roadside and neglected lands. This plant likes sandy, gravel and rocky soil…

Temulawak (Curcuma zanthorrhiza)

Temulawak or Java ginger or Javanese ginger or Javanese turmeric or Curcuma xanthorrhiza (Curcuma zanthorrhiza) is a plant species in Zingiberaceae, grows well in loose soil in tropical forests in the lowlands to an altitude of 1500 meters above sea level and tubers are used for medicinal herbs and drinks.

C. zanthorrhiza has pseudo stems up to 2 m tall. The stem is a midrib of upright, overlapping leaves, green or dark brown in color. Rhizomes are perfectly formed, large, branched and reddish brown, dark yellow or dark green.


Each bud forms 2-9 leaves with a circular shape extending to lancet, green or light purple to dark brown, leaves 31-84 cm long and 10-18 cm wide, stems 43-80 cm long and each strand is connected with a midrib.

Flowers are dark yellow, uniquely shaped and clustered with lateral inflorescences. The stems and scales are in the form of lines, 9-23cm long and 4-6cm wide, having protectors with comparable crowns. Petals are white, hairy and 8-13mm long.

The crown is tu…