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Published In: Proceedings of the Linnean Society of London 1: 253. 1845. (Proc. Linn. Soc. London) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: A genus of 6 to 8 species found in the dry desert areas of Iran, Central Asia, Afghanistan, W. Pakistan and India.

 

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Plants annual. Leaves 1-2-pinnate. Bracts and bractlets scarious, whitish, linear to lanceolate or oval. Rays 5-15. Calyx teeth obsolete. Petals white to rose coloured, bilobed. Fruit ovoid, densely hairy to hispid; primary and second¬ary ridges distinct; vittae solitary under the secondary ridges; commissure 2-vittate. Inner seed face plane to slightly concave.
 

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1 Stem and leaves glabrous Psammogeton biternatum
+ Stem glabrous to pubescent. Leaves pubescent Psammogeton canescens
2 (2) Hairs on fruit 1-1.5 mm long. All parts of plant pubescent (2)
+ Hairs on fruit less than 0.5 mm long. Stem glabrous to pubescent (3)
3 (2) Stem pubescent. Hairs on fruit glochidiate
+ Stem glabrous to puberulous. Hairs on fruit T-shaped Psammogeton stocksii
 
 
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