The genus Amorphophallus Blume ex Decne. (Araceae), with more than 200 species, is one of the most taxonomically difficult genera of the family, and in fact is one of the moderately understood of all Asian aroid genera. The 11 sections recognised by Engler have been currently reduced to 10, and out of the 10 sections three, viz. Candarum Engl., Conophallus (Schott) Engl. and Rhaphiophallus (Schott) Engl. are represented in India. Rhaphiophallus as recognized now including sect. Synantherias comprises eight species: Amorphophallus bonaccordensis Sivad. & N. Mohanan, A. hohenackeri (Schott) Engl. & Gehrm., A. konkanensis Hett., S. R.Yadav & K. S. Patil, A. longiconnectivus Bogner, A. margaritifer (Roxb.) Kunth, A. mysorensis E. Barnes & C. E. C. Fisch., A. smithsonianus Sivad., and A. sylvaticus (Roxb.) Kunth. Herein A. bhandarensis S. R.Yadav, Kahalkar & Bhuskute is recognized at the new rank of variety, as A. mysorensis var. bhandarensis (S. R. Yadav, Kahalkar & Bhuskute ) Sivad. & Jaleel. The name Amorphophallus sylvaticus (Roxb.) Kunth is lectotypified here. All except A. sylvaticus (also occurring in Sri Lanka) are endemic to India.Keywords: Araceae; Amorphophallus; Rhaphiophallus; India; Endemics.DOI: 10.3329/bjpt.v18i1.7835Bangladesh J. Plant Taxon. 18(1): 1-26, 2011 (June)
Recent field works in the central and southern regions of Saudi Arabia including agricultural centers have managed to collect four vascular plants new to terrestrial and wetland flora of the country. These new additions include one new genus Malvastrum A. Gray (M. coromandelianum) subsp. capitato-spicatum (O. Kuntze) S.R. Hill, Potamogeton perfoliatus L. (Potamogetonaceae), Euphorbia tirucalli L. (Euphorbiaceae) and Sesuvium portulacastrum (L.) L. (Aizoaceae). Detailed morphological description, distribution and habitat of each of these species are provided along with illustrations and photographs. The report of new additions to the flora of Saudi Arabia indicated that the country needs thorough botanical explorations.
Impatiens theuerkaufiana, a new scapigerous species of Impatiens (Balsaminaceae) from Wayanad district, Kerala, India is described and illustrated. It differs from I. dendricola by having entire lateral sepals, a transversely elliptic, bilobed dorsal petal with wavy margins, a short straight spur less than 5 mm long, and tuberculate seeds; from I. agumbeana by having pendulous linear lanceolate leaves, shorter pedicels up to 3.5 cm long, non-auricled lateral united petals, and an ellipsoid capsule; and from I. stocksii by having long petioles of 5-8 cm, an elliptic lanceolate leaf lamina, long pedicels of 2.0-3.5 cm, and a pouch-like short spur.
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