Rubyung (Pyrrosia longifolia)

Rubyung (Pyrrosia longifolia) is a plant species in Polypodiaceae, an epiphytic fern that grows vines on a large tree to form dense colonies and covers the tree trunk, grows wild in the shade of forest canopy, sometimes in open areas, plantations and neglected lands.

P. longifolia has fibrous roots with rhizomes. Stems in the form of a rhizome that grow creeping, long, dark brown, 3 mm in diameter and densely noisy. Ptiolus blackish brown, 10-15 mm long, 4 mm diameter and has trichomes.

The leaves are green, slightly thick, linear in shape, flat edges, smooth and shiny top surface. Sterile has an oblong shape and a widened center, 20 cm long and 2.5 cm wide. Fertile has a rounded tip, is 35 cm long and 3 cm wide.

Sorus sticks to the lower surface, is round in shape, clustered on some of the upper leaves and is brown in color. The scales on the rhizome are oblong-ovate, 2-3 mm long, dark brown in the middle, flat, yellowish-white, and have more than 100 hairs. Trichomes of sterile ptiolus and leaves are stelata, 8-9 arms and white in color.

Kingdom: Plantae
Phylum: Tracheophyta
Class: Polypodiopsida
Subclass: Polypodiidae
Order: Polypodiales
Suborder: Polypodiineae
Family: Polypodiaceae
Subfamily: Platycerioideae
Genus: Pyrrosia
Species: Pyrrosia longifolia

Screw tree (Helicteres isora)

Screw tree ( Helicteres isora ) is a species of plant in the Malvaceae family. It is a shrub or small tree, up to 8 meters tall. It has gray bark and alternate leaves, up to 22 cm long and 17 cm wide, oval in shape, with serrated edges and hairs. The flowers are red or white and reach a total length of 5.5 cm. The fruit is green when unripe, brown or gray when dry, twisted, spiral-shaped, and pointed at the tip. The seeds are black or brown, shiny, and diagonal, triangular, or rectangular. TAXON Kingdom: Plantae Phylum: Tracheophyta Subphylum: Angiospermae Class: Magnoliopsida Order: Malvales Family: Malvaceae Subfamily: Helicteroideae Tribe: Helictereae Genus: Helicteres Pluk. ex L. in Sp. Pl.: 963 (1753) Species: Helicteres isora L. in Sp. Pl.: 963 (1753) HETEROTYPIC SYNONYMS Helicteres baruensis var. ovata DC. in Prodr. 1: 476 (1824) Helicteres chrysocalyx Miq. ex Mast. in J.D.Hooker, Fl. Brit. India 1: 365 (1874) Helicteres corylifolia Buch.-Ham. ex Dillwyn in Rev. Hortus Malab....

Breng (Coldenia breng)

Breng ( Coldenia breng ) is a species of plant in the Boraginaceae family. It is a herbaceous plant that grows along the ground, with radial, cylindrical stems, red, multi-branched, alternate, and white-haired. C. breng has alternate leaves along the stem, oval to nearly round, up to 2.5 cm long, up to 1.5 cm wide, and white-haired. This plant grows in floodplains, seasonally inundated riverbanks, and drying rice fields. It thrives in sandy or silty soils and is drought-tolerant. TAXON Kingdom: Plantae Phylum: Tracheophyta Subphylum: Angiospermae Class: Magnoliopsida Order: Boraginales Family: Boraginaceae Subfamily: Cordioideae Genus: Coldenia L. in Sp. Pl.: 125 (1753) Species: Coldenia breng Aryo Bandoro Dlium TheDlium YouTube: https://www.youtube.com/@Dlium

The oldest drawing specimen collection, Balaenoptera physalus Linnaeus, 1758 (OBS.296787995)

BLOG - Before the invention of photography, everything was explained by hand drawings that required naturalists to be able to draw to describe the specimens they documented. Scholars from taxonomy to medicine had to be able to sketch leaves to the human heart, this is why the academic world at that time had the subject of "art and science". A tradition that taxonomic drawings are accompanied by a measurement scale usually by placing a measuring tool in millimeters or centimeters or inches that supports scientific sketches has an identification context, but of course there are obstacles to having to document large specimens. I found a picture of a large specimen: Balaenoptera physalus (Linnaeus, 1758). Uniquely, the specimen with catalogue number: OBS.296787995 and stored at the Observation International, Aarlanderveen, Netherlands, is the oldest I have ever known. The shabby drawing with three folds and worn edges was made in 1547 or more than 500 years old. Previously I ...

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