caa a22 4500 465806228 CHVBK 20180323112104.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF03053487 doi (NATIONALLICENCE)springer-10.1007/BF03053487 Punetha N. Department of Botany, Government PG College, 262 501, Pithoragarh, India aut Vascular morphology of stipe and rachis in some western Himalayan species of Pteris Linn [Elektronische Daten] [N Punetha] Vascular supply to leaf in 8 species of the fern genusPteris is described. Except inPteris cretica in which the stipe is supplied by a pair of ribbon like vascular bundles, stipe vasculature of the other 7 species studied is solitary and gutter-shaped; in transection the vascular bundle inPteris cretica, Pteris dactylina andPteris stenophylla is V-shaped, Ω-shaped inPteris wallichiana and horse-shoe shaped in others. InPteris vittata andPteris wallichiana pinna trace is extra marginal in origin while in all others it is marginal. Based on number and structure of vascular strand and nature of origin of pinna traces it is concluded thatPteris cretica andPteris vittata are relatively advanced over other species with simply pinnate fronds.Pteris wallichiana has been considered as highly evolved among the species investigated. Indian Academy of Sciences, 1990 Adaxial xylem plate nationallicence leaf vasculature nationallicence Ω-shaped vascular bundle nationallicence pinna trace nationallicence Pteris nationallicence Proceedings: Plant Sciences Springer India 100/6(1990-12-01), 399-407 0370-0097 100:6<399 1990 100 12388 https://doi.org/10.1007/BF03053487 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF03053487 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Punetha N. Department of Botany, Government PG College, 262 501, Pithoragarh, India aut NATIONALLICENCE 773 0- Proceedings: Plant Sciences Springer India 100/6(1990-12-01), 399-407 0370-0097 100:6<399 1990 100 12388 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer