620 DR. M. T. MASTERS! GENERAL VIEW 
63. Pixvs prvaricata, Dumont de Courset, Bot. Cult. iii. p. 760 
(1802); Sudworth, ex Sargent, Silva, xi. (1897) p. 147, 
tab. 588; Britton J Brown, i. (1896) p. 52, fig. 114. 
P. Banksiana (1803). 
A species common in the Atlantic States of N. America, 
from Nova Scotia to Minnesota. It is more generally known 
under the name Banksiana (1803); but I follow Sargent, J. c., 
in adopting the original name, as Aiton in 1789 alluded to it 
as var. divaricata of P. silvestris. It has also received the 
names of P. Hudsonia (Poiret, 1804) and P. hudsonica (Parla- 
tore, 1868). The species is well known and has been often 
described, so that it is only necessary to add a few particulars 
mostly derived from the tree as met with in cultivation. The 
herbaceous shoots are cylindric and clothed to the base with 
leaves. In the cortex is a single row of resin-canals. The 
leaves are rarely more than 5 cent. long, slightly curved, and 
emerging from a very short sheath 5-6 mill. long. The thin 
wall-layer is conspicuous beneath the epidermis. The endoderm- 
cells number about 60. ‘The resin-canals are in the substance 
of the mesophyll and surrounded by stereome. The meristele 
is elliptic, and the fibro-vascular bundle branched. The leaf- 
buds are slender, cylindric-obtuse or slightly pointed, the 
bud-scales lanceolate, membranous, but not lacerate at the 
edges. The clusters of male flowers are 15 mill. long, racemose. 
Anthers orange ; anther-crest suborbicular, nearly entire. The 
female cones are produced laterally on the shoots of the year 
and are shortly stipitate, but ultimately become subsessile, 
upturned, and appressed to the branch, to which they remain 
attached for a long period. In shape they are oblong-conic, 
curved. Cotyledons 4-5. 
64. P. murtcata, D. Don; Sargent, Silva, xi. (1897) p. 139, 
tab. 585; Masters, in Gard. Chron. Jan. 12, 1884, figs. 8 & 9. 
A native of the Californian cvast-district, remarkable for the 
length of time that the cones remain attached to the branch. 
The elongated clusters of male flowers with the intervening 
bracts are also remarkable. The leaves are in pairs, rarely 
in threes. The section is boat-shaped, showing a thin layer of 
water-cells beneath the epidermis, between it and the thick 
hypoderm. The walls of the cells of the mesophyll are infolded. 
The endoderm-cells about 50 in number, much thickened on 
