Chromosome studies inSalvia (labiatae): West-himalayan species

Cytological Studies in Some North Indian Labiatae

“…Two species S. plebia (n=8) and S. leucantha (n=11) were studied and are in accordance with the earlier identical records for these (Gill 1971a). For the latter species Carlson and Straut (1936) reported 2n=32, indicating thereby its existence as two chromosomal types.…”

“…Salvia is highly polybasic with x=6-13, 15, 17, 19 (Darlington and Wylie l. c.). Gill (1971a) The earlier record of 2n=34 (Mehra andGill 1968, Gill 1971b) for the species is confirmed and it is diploid on x=17, suggested by Gill (1971b).…”

“…However, since both these species are characterised by early dis junction of some of the bivalents at M-I, the earlier records by Jha and Sinna (l. c.) for L. aspera and Mehra and Gill (1968);Gill (1970) for L. cephalotes, probably, need further confirmation.…”

“…The floral heads at maturity become pendant in L. cephalotes while these remain in position in L. aspera. It may be added that a close examination of the voucher specimens of L. aspera and L. cephalotes sub mitted to the Panjab University Botany Department, Chandigarh, by Mehra and Gill (1968); Gill (1970) did not reveal any morphological distinctness. Cytological data is available for 9 species of the genus.…”

“…L. aspera (n=14) though in conformity with the earlier record of Mehra and Gill (1968), differed from the report of n=11 by Jha and Sinna (1960) for the species. For L. cephalotes Mehra andGill (1968) andGill (1970) recorded n=14.…”