Soft fern (Christella dentata)

Soft fern (Christella dentata) is a species of plant in the Thelypteridaceae, small ferns growing on the edge of rainforests, rivers or more open forests with adequate humidity, circular-shaped sori covered with hairs, a widespread cosmopolitan.

C. dentata grows in the soil, often in moist rocky areas, along river banks and in sedimentary forest remnants. The rhizome spreads on the rock surface and the roots enter the rock crevices. The branching of the petiole is very close to the ground and the stem is difficult to see clearly. True roots dark in color and fibers that branch dichotomous. The tip of the root has caliptra.

True stems grow above the soil surface with lateral branching and not branching. The surface of the stem has a very dense ramenta and forms a dense layer. Stems runny when young and woody when old. The stele ranges from protostele to dictiostele and the transport bundle is composed of amphicibral concentric structures.

Compound leaves, lanceolate, green, fertile and sterile, have fronds, size 40-80 cm and soft with fine hairs on the surface. Green leaves with indented edges. Each groove has 4-5 pairs of spores lined up along the edges at the underside of the leaves, neatly arranged and lined up between sorus to form a collection of sori.

Phylum: Tracheophyta
Class: Polypodiopsida
Subclass: Polypodiidae
Order: Polypodiales
Suborder: Aspleniinae
Family: Thelypteridaceae
Subfamily: Thelypteridoideae
Genus: Christella
Species: Christella dentata

Comments

Indian rosewood (Dalbergia latifolia)

Sonokeling or Java palisandre or Indian rosewood ( Dalbergia latifolia ) is a species of plant in the Fabaceae, a large tree producing hardwood, medium weight and high quality, rounded leaves, thin and broad pods, highly adaptive, grows in dry and rocky landscapes with lots of sunlight. D. latifolia has medium to large size, cylindrical stems, up to 40 m high with a ring of up to 2 m, the bark is brownish gray and slightly cracked longitudinally. The crown is dense, dome-shaped and sheds leaves. The leaves are compound and pinnate oddly with 5-7 strands that have different sizes and appear alternately on the shaft. The leaves are round or elongated in width or heart, the upper surface is green and the surface is pale green. The flowers are small, 0.5-1 cm long and clustered in panicles. The pods are green to brown when ripe and are elongated lanceolate, pointed at the base and tip. The pods have 1-4 seeds which are soft and brownish. Indian rosewood grows at elevations below 600 m,

Sengiran (Pittosporum moluccanum)

Sengiran ( Pittosporum moluccanum ) is a species of plant in the Pittosporaceae, small tree, up to 7 meters high, green leaves, elliptical to narrow elliptical, up to 17 cm long, up to 6 cm wide, sharp tip, narrow base and 1-1.5 cm long stalk. P. moluccanum has an inflorescence which is a collection of flowers. The fruit is red, capsule-shaped, elongated oval, sharp tip, 2 broken valves containing small and red seeds. This species grows in forests, plantations, roadsides, open or shaded areas. Kingdom: Plantae Phylum: Tracheophyta Subphylum: Angiospermae Class: Magnoliopsida Order: Apiales Family: Pittosporaceae Genus: Pittosporum Species: Pittosporum moluccanum

Evolution theory goes beyond

OPINION - As a Wallacean and Darwinian, I have always viewed life from the perspective of evolutionism. I see the world of plants and animals always using evolutionary theories. How a species develops functional organs, forms morphology, adapts to ecosystems and so on as a natural laws. This perspective ultimately forms my framework for thinking about various things, including the way I see myself, everyday problems and the way I think about big things such as economics, geopolitics, war and so on using an evolutionary perspective. Alfred Russel Wallace, Charles Darwin and Jean-Baptiste Lamarck are three great figures who really inspired me. They are well known as pioneers of evolutionary theories. They start from small things in the sub-subject of biology, although they also discuss geology and so on. Wallace focused on species adaptation and Darwin on sexual selection. Both developed evolutionary thinking using observational methods. Lamarck focused on structural morphology using l

Dlium

Search This Blog