435 
Squamae circiter 25 mm. longae, ad 18 mm. latae, supra apice 
excepto glabrae, subtus furfuraceo-tomentellae ; ; acumen rigidum, 
sursum directum, circiter 12 mm. lon 
Between cane and Phre, near Pang Pooey, i in deciduous jungle, 
420 m., Kerr, 
Lao name, Ms Prou Tou (ex Kerr). 
Cycas siamensis, Mig.—F.B.1., v. p. 657; For. FI. Burma, ii. 
. 503; Hosseus, ii. p. 367. 
Ban Meh Weng, 300 m. (ex Hosseus). 
Distr. Bur 
GNETACEAE. 
Gnetum scandens, Ror).—F.B.I., 
Chiengmai, by a stream, foot of Dott aba: 300 m., Kerr, 602. 
Distr. India, Assam, Malaya. 
CONIFERAE. 
Cephalotaxus Fortunei, Hook. pense li, p. 368. 
Doi Intanon, 1300-1650 m. (ex Hosseus). 
Pinus khasya, Royle—¥.B.1., v. p. 652; Coll. et Hemsl., Journ. 
Linn. Soc., xxviii. p. 129 ; Hosséus, 8 m 
Chiengmai, on open ridges on Doi Sootep, 900-1600 m., Kerr, 
962, Hosseus, 318. 
Dut. Burma, Assam, Bengal. 
Lao name, Mai Kia (ex Kerr). 
Pinus Merkusii, Jungh.—F.B.L., v. p. 652; Coll. et Hemsl., 
Journ. Linn. Soc., xxviii. p. 129 
Near Chiengrai, Hue San, common in eng jungle, 450-480 m., 
Kerr, 250 
Distr. ‘Burma, Cochinchina, Sumatra, Philippines. 
Lao name, Mai Kia (ex Kerr). 
LVII—“WHITE-HEADS” OR “TAKE-ALL” OF WHEAT 
AND OATS 
( Ophiobolus graminis, Sacc.) 
G. Masszer. 
This serious disease presents itself under two very different 
aspects, depending to a very great extent on the period at which 
plants are attac and on wea tae conditions favouring 
respectively the host Giant or the fungu 
the condition known as “ White-heads,” the plants usually 
attain their full growth and the ears are of normal size, but the 
grain either remains a yee or is very much shrivelled and 
useless. The ears and straw of such diseased plants present a 
bleached Sppesinies, suggesting at a distance premature ripening, 
but on examination the entire plant proves to be dry and dead, and 
two or three inches at the base of the straw presents a blackened 
appearance, as if it had been charred, If this blackened portion 
