592 DR. M. T. MASTERS: GENERAL VIEW 
The meristele is elliptic, or slightly three-sided, with an un- 
branched bundle. The cones are shortly stalked, deflexed, oblong- 
conie, 5-7 cent. long; the scales have a tumid apophysis and an 
elliptic umbo. 
27. Pinus tonetronta, Rovburgh; J. D. Hooker, in Fl. Brit. 
Ind. vy. p. 652, and in Himalayan Journals, i. p. 100; Gamble, 
Man. Ind. Timbers, ed. 2, p. 706; Collett, Fl. Simlensis (1902), 
p: 485, fig. 158. 
A species native of the North-West Himalaya and Sikkim, 
but not extending into Afghanistan according to Aitchison 
(Journal of Linnean Society, Bot. xix. pt. 2, p. 142). 
The very long, decurved leaves are arranged in tufts of 3; 
in section they are seen to be three-sided, with a convex dorsum 
and two flattish or slightly concave sides meeting in a prominent 
anterior ridge. The hypoderm is in two rows, with wedge- 
shaped projections, and the resin-canals, when present, which is 
not always the case, marginal. The cell-walls of the mesophyll 
are slightly infolded. The endoderm-cells, about 40 in number, 
are large and ovoid ; the meristele is elliptic or subtriangular in 
section, enclosing a branched vascular bundle. The male 
flowers are cylindric-oblong, arranged in corymbose clusters. 
The cones resemble those of P. canariensis or P. Pinaster, with 
tumid, recurved apophyses, and an umbo with a short slender 
curved mucro. The seeds are 10-12 mill. long, elliptic, greyish 
with lilac-coloured stripes. The long oblong wing svon falls off. 
28. P. Kiasya, Royle; Hook. f. in Fl. Brit. Ind. v. p. 652 
(1888); Brandis, Forest Flora, p. 508; Gamble, Alan. Indian 
Timbers, ed. 2 (1902), p. 708. 
A three-leaved species. The leaf-section shows a convex 
dorsum and two concave sides meeting in a sharp ridge. In the 
specimen examined there was no hypoderm, but this point 
requires further examination. The resin-canals are marginal, 
the meristele triangular in section with a branched fibro-vascular 
bundle. 
The small oblong male flowers are in loose spikes. 
The cones are shortly stalked, deflexed, ovoid-conic. The cone- 
scales are rugose, the free border elliptic, and the umbo rhomboid. 
The species is a native of the Khasya Hills, Chittagong, and 
Burma ([ooker). 
