Online Manual for the Forest Tree Seeds of Kerala

A Kerala Forest Department Funded Project


Dr. K Sudhakara
Professor & Head of the Department
Dept. of Silviculture & Agroforestry
College of Forestry, Kerala Agricultural University, Thrissur 680 656
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Scientific Name  Jacaranda mimosifoila D.Don.
Vernacular name  Jacaranda (Malayalam) (Chacko et al., 2002)
Common name  Brazilian rosewood, Mimosa-leaved Jacaranda (Chacko et al.,2002)
Synonyms  Jacaranda ovalifolia R.Br. (Chacko et al., 2002)
Family  Bignoniaceae
Subfamily 
Origin 
Distribution  Native of South America. In Kerala it is often planted in tea gardens as shade tree (Chacko et al., 2002)
Description  Small to medium sized evergreen tree, attaining a height up to 20 m (Luna, 1996; Chacko et al., 2002)
Flowering season  March and also in other times
Fruiting season  November to January (Chacko et al., 2002)
Flowers  Blue mauve flowers, borne profusely in loose pyramidal terminal panicles of 40 to 100
Fruits  Fruit is a capsule, 7.5cm x 5 cm in size, broadly ovate or sub orbicular in shape with many compressed winged seeds (Chacko et al.,2002)
Fruit type  Capsule
Seeds  Seed winged
Seed length 
Seed width 
Seed thickness 
Seed weight  11,000 to 1,00,000 seeds/kg (Carlowitz, 1991; Chacko et al., 2002)
Seed dispersal 
Seed Collection  Mature pods are collected from the tree by lopping off the branches (Chacko et al., 2002)
Transportation of seeds  Pods collected in cotton bags are transported, to the processing centre (Chacko et al.,2002)
Seed processing  The pods are dried in the sun. When they open, seeds are extracted by hand. Care should be taken during extraction of seeds as they are easily carried away by wind. Seeds are sun-dried (Chacko et al., 2002)
Seed storage  Orthodox (Kindt et al.,1997). Seeds can be stored in airtight containers for one year (Chacko et al.,2002)
Viability period  Seeds retain viability up to one year (Chacko et al.,2002)
Seed emptiness  Low (Chacko et al.,2002)
Seed pre treatment  Not required (Chacko et al.,2002)
Germination type  Epigeal (Chacko et al.,2002)
Germination percentage  50 to 90 (Carlowitz, 1991; Chacko et al., 2002)
Germination period  10 to 15 days (Chacko et al.,2002). Germination percentage and rate are highest at 25o C. White light slightly enhance germination at temperatures ranging from 20 to 35 oC (compared with seeds in the dark), indicating the possible role of phytochrome B in the control of seed germination in this species. Germination percentage and rate decreased as water stress increase from 0 to -0.9 MPa (Socolowski and Takaki, 2004).
Nursery technique  Seeds are sown in germination trays filled with soil and watered regularly. Overhead shade is necessary. Seedlings are potted in poly bags (22.5x17.5 cm) containing potting mixture when they attain about 5 to 6 cm height (Chacko et al.,2002)
Method of propagation  Cuttings of half-ripened wood
Vegetative propagation 
Pests  Nil (Chacko et al.,2002). In forest nurseries defoliation by curculionids, scarabaeids and chrysomelids is very common, especially after the rains. Sap suckers such as psyllids, aphids and membracids play an equally devastating role, causing heavy mortality of seedlings. Phorate is effective in preventing psyllid infestations of seedlings when added to polybags prior to transplantation (Sivaramakrishnan and Remadevi, 1996).
Diseases  No information (Chacko et al.,2002)
Medicinal properties  The plant is used medicinally in Colombia : an infusion of the leaves is taken as a pectoral ; the powdered leaves are used as vulnerary ; an infusion of the bark is used as a lotion to wash ulcers ; the bark and the leaves are given internally for syphilis and blennorrhagia. Crude extracts show activity against Salmonella typhi and Shigella dysenteriae at low concentrations (Dada et al., 2002). Infusions or decoctions of flowers or leaves of Jacaranda mimosifolia are traditionally used in Guatemala to treat amoebic dysentery (Magnez et al., 1996).
Uses  It is an excellent ornamental tree in avenues, parks and gardens.
Wood properties  The wood is white, moderately hard and moderately heavy. It is characterised by diffuse porous structure with numerous small pores
References  Get ...
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