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!Alternanthera sessilis (L.) R. Br. ex DC. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Catalogus plantarum horti botanici monspeliensis 77. 1813. (Cat. Pl. Horti Monsp.) Name publication detail
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Distribution: Distribution: A common species, very widepsread in the tropics and subtroprics of both Old and New Worlds in waste and cultivated ground, especially in damp or wet conditions.
Comment/Acknowledgements: No specimen of Alternanthera nodiflora R. Br. has been seen from Pakistan, and the record by Hassanain quoted by Stewart (but with no reference) must therefore remain suspect.
Photo: Alternanthera sessilis (L.) R. Br. ex DC. (Photo)
Map Location: B-6 Peshawar District: Mattra, 1200, Deane 114 (K); B-7 Swat: Mingora, 3000, Stewart 24219 (RAW); B-7 Hazara: Haripur, M. Qaiser & A. Ghafoor 4032 (KUH); C-6 Peshawar District:: around forest college of University of Peshawar, Saeeda Qureshi 111 (KUH); C-6 Khyber District: Kacha Gasi, 5 miles from Peshawar on way to Kabul, Sultanul Abedin 8538 (KUH); C-7 Rawalpindi District: Sohan River, Rawalpindi, 1500, Stewart 419 (RAW); Bara Kao, 16 miles from Rawalpindi on way to Murree, Sultanul Abedin 7609 (KUH); C-7 Jhelum District: Jhelum, Stewart 499 (K); C-8 Kashmir: Poonch, foothill zone, Jan Mohd 5410 (E); D-4 Chagai District: Sita Bani, Quetta range, Duthie 25998 (RAW) ; D-7 Lyallpur District: Lyallpur, M. Qaiser 355 (KUH) ; D-8 Lahore District: Changa Manga, Sultanul Abedin 2595, 2602 (KUH); F-4 Dadu District: Dokri, M.J. Husain s.n. (KUH); G-4 Karachi District: Kulrey Lake, near Karachi, Sultanul Abedin 3557 (KUH); G-4 Thatta District: 10 miles from Kate Bunder on way to Gharo, Sultanul Abedin, M. Qaiser & A. Ghafoor 9406 (KUH); 12 miles from Sajawal on way to Thatta, M. Qaiser, A. Raze & A. Husain (KUH) ; (KUH); G-5 Tharparkar District: 12 miles from Digri on way to Mirpur Khas, M. Qaiser & A. Ghafoor 3624 (KUH); G-6 Tharparkar District: Budhe-Sar, Nagar Parkar, M. Qaiser, A.Ghafoor & A. Husain 4082 (KUH).

 

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Annual or usually perennial herb; in drier situations with slender, more solid stems, erect, ± much-branched, to c. 30 cm; in wetter places ascending or commonly prostrate with stems c. 0.1-1 m long, rooting at the nodes, ± fistular, with numerous lateral branches; when floating very fistular, the stems attaining several metres in length and over 1 cm thick, with long clusters of whitish rootlets at the nodes. Stem and branches green or purplish, with a narrow line of whitish hairs down each side of the stem and tufts of white hairs in the branch and leaf axils, otherwise glabrous, striate, terete. Leaves extremely variable in shape and size, linear-lanceolate to oblong, oval, or obovate-spathulate, 1-9 (-15) x 0.2-2 (-3) cm, blunt to shortly acuminate at the apex, cuneate to attenuate at the base, glabrous or thinly pilose, especially on the lower surface of the midrib; petiole obsolete or up to c. 5 mm. Inflorescence sessile, axillary, solitary or in clusters of up to c. 5, subglobose (or somewhat elongate in fruit), c. 5 mm in diameter; bracts scarious, white, deltoid-ovate, mucronate with the excurrent pale midrib, glabrous, c. 0.75-1 mm; bracteoles similar, 1-1.5 mm, also persistent. Tepals oval-elliptic, equal, 1.5-2.5 mm, acuminate to rather blunt, white, glabrous, shortly but distinctly mucronate with the stout, excurrent midrib, the margins obscurely denticulate. Stamens 5 (2 filaments anantherous), at anthesis subequalling the ovary and style, the alternating pseudostaminodes resembling the filaments but usually somewhat shorter. Ovary strongly compressed, roundish, style extremely short. Fruit obcordate or cordate-orbicular, 2-2.5 mm long, strongly compressed with a narrow, pale, somewhat thickened margin. Seed discoid, c. 0.75-1 mm, brown, shining, faintly reticulate.
 
 
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