Tropical Plant Research

Tropical Plant Research

An International Journal by Society for Tropical Plant Research

E-ISSN: 2349-1183 P-ISSN: 2349-9265
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2014, VOLUME 1 ISSUE 3Pages: 13-15

Pogonatum perichaetiale subsp. thomsonii (Mitt.) Hyvönen - An uncommon species from western Himalaya

Vinay Sahu and A.K. Asthana*
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Abstract:
The present study deals with the investigation of Pogonatum perichaetiale subsp. thomsonii from Watan Village, Pithoragarh. The important characteristics of this species are plants simple, leaves stiff, tufted and forming a bud like structure when dry, margin sharply toothed in upper part of the leaves, costa ends in a sharp awn like point. Leaf base 1/4 to 1/5 of the total leaf length, lamellae 5 ̶ 6 cells high, end cells of lamellae thick walled, smooth rectangular. The present study recognizes Pogonatum perichaetiale subsp. thomsonii a rare species from Uttarakhand which is a new addition to west Himalayan bryoflora of India.
Pogonatum perichaetiale subsp. thomsonii: A, Plant in dry condition; B, Plant in wet condition; C, Leaves; D, Apical margin of Leaf; E & F, Cross sections of leaves showing Lamellae; G, Apical cells of leaf; H, median cells of leaf; I, basal cells of leaf.

Fig.: Pogonatum perichaetiale subsp. thomsonii: A, Plant in dry condition; B, Plant in wet condition; C, Leaves; D, Apical margin of Leaf; E & F, Cross sections of leaves showing Lamellae; G, Apical cells of leaf; H, median cells of leaf; I, basal cells of leaf.


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