Tropical Plant Research
An International Journal by Society for Tropical Plant Research
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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*
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.
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.
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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