Giant sensitive tree (Mimosa pigra)

Giant sensitive tree (Mimosa pigra) is a species of Mimosa in Fabaceae that forms dense shrubs, woody, thorny and widely spread throughout the tropics, especially in wet areas. These legumes have a height of up to 6 m, the stem is greenish in young plants but becomes brown wood when the plant is enlarged.

M. pigra is armed with spines up to 7 mm long on the trunk, bright green leaves and bipinnate where smaller spines stand in the middle 20 to 25 cm long with 5 cm pinnae lengths to 16 pairs, each divided into pairs for lengths of 3 to 8 mm. The leaves fold when touched and the night comes.

Pink flowers 1 cm in diameter. Each flower head produces a group of 10 to 20 seed pods which then break into hairy segments and each contains seeds. Mature seeds are light brown to brown, hard and can remain idle for at least 23 years in sandy soil.

Giant sensitive trees germinate throughout the year on moist soil but do not flood and most germination at the beginning and end of the rainy season. Seedling growth is very fast and flowering after 4 to 12 months. The process from flower buds to mature seeds takes about five weeks.

Kingdom: Plantae
- : Angiosperms
- : Eudicots
- : Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Caesalpinioideae
- : Mimosoid clade
Genus: Mimosa
Species: M. pigra

A deep-sea isopod Bathyopsurus nybelini adapted to feed submerged Sargassum algae

NEWS - Incredible footage shows a marine species, Bathyopsurus nybelini , feeding on something that sinks from the ocean’s surface. Researchers using the submersible Alvin found the isopod swimming 3.7 miles down using its paddle-like legs to catch an unexpected food source: Sargassum. Researchers from Woods Hole Oceanographic Institution (WHOI), the University of Montana, SUNY Geneseo, Willamette University and the University of Rhode Island found the algae sinking, while the isopod waited and adapted specifically to find and feed on the sinking nutrient source. The Sargassum lives on the surface for photosynthesis. The discovery of a deep-sea animal that relies on food that sinks from the waters miles above underscores the close relationship between the surface and the deep. “It’s fascinating to see this beautiful animal actively interacting with sargassum, so deep in the ocean. This isopod is extremely rare; only a handful of specimens were collected during the groundbreaking Swedis...

Pink poui (Tabebuia rosea)

Pink poui ( Tabebuia rosea ) is a species of plant in the Bignoniaceae, a small neotropical tree, growing up to 30 meters tall and up to 100 cm in diameter. It has layered and irregular branches, with gray to brown bark and vertical fissures. The leaves are compound, finger-shaped, five-petaled, length up to 33 cm, width up to 15 cm and long stalk up to 9 cm. The flowers are large, bright red or purple or white, fan-shaped, up to 9 cm long, up to 8 cm wide. The fruit capsule is slender and up to 35 cm long. The fruit dries and dehisces, producing anemochorous seeds with hyaline membrane wings. TAXON Kingdom: Plantae Phylum: Tracheophyta Subphylum: Angiospermae Class: Magnoliopsida Order: Lamiales Family: Bignoniaceae Genus: Tabebuia Gomes ex DC. in Biblioth. Universelle Genève, n.s., 17: 130 (1838) Species: Tabebuia rosea (Bertol.) DC. in Prodr. 9: 215 (1845) HOMOTYPIC SYNONYMS Couralia rosea (Bertol.) Donn.Sm. in Bot. Gaz. 20: 9 (1895) Sparattosperma roseum (Bertol.) Miers in Proc....

Hairy senna (Senna hirsuta)

Hairy senna ( Senna hirsuta ) is a species of plant in the Fabaceae family. It is an upright shrub, growing up to 2.5 meters tall. The leaves are compound on petioles up to 13 cm long. They usually have 2-6 pairs of leaflets, are egg-shaped, and have white hairs, up to 10 cm long and 5 cm wide. The flowers are yellow and arranged at the tips of branches and in the upper leaf axils in clusters of 2-5. The petals are 12-16 mm long, have 6 stamens, 3-8 mm long anthers, and 4 staminodes. Flowering occurs almost monthly. The pods are cylindrical, up to 15 cm long, 4-6 mm wide, and curved. TAXON Kingdom: Plantae Phylum: Tracheophyta Subphylum: Angiospermae Class: Magnoliopsida Order: Fabales Family: Fabaceae Subfamily: Caesalpinioideae Tribe: Cassieae Subtribe: Cassiinae Genus: Senna Mill. in Gard. Dict. Abr., ed. 4.: [s.p.] (1754) Species: Senna hirsuta (L.) H.S.Irwin & Barneby in Phytologia 44: 499 (1979) Variety: Senna hirsuta var. acuminata (Benth.) H.S.Irwin & Barneby, Senna ...

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