624 DR. M. T. MASTERS: GENERAL VIEW 
grey, lobed; the umbo very convex, with a short, subulate, 
reflexed mucro. Cotyledons 4-6. 
69. Pinus etasra, Walter (1788); Sargent, Silva, xi. (1897) 
p- 131, tab. 583. 
A North American species, extending from South Carolina to 
Florida. 
The leaves are in pairs, each leaf about 5-8 cent. long, 
‘slender. In section the leaf is semiterete, flat on the upper 
surface, with epiderm, two layers of hypoderm, cortical cells 
with infolded walls; resin-canals median, in one instance 
internal, surrounded by stereome-cells. Sargent also figures 
one canal as internal. The meristele is oblong in section, 
separated from the cortical tissue by the endoderm-layer con- 
sisting of 30-40 oblong cells (see also Trimble, fig. 30; Coulter 
& Rose, p. 308). The male flowers are in rounded clusters ; 
the cones sessile, ovoid, 4-5 cent. long. The apophyses are 
slightly convex, 4-sided, with a minute mucro terminating the 
umbo. Cotyledons 5-6. 
An interesting account of this Pine is given by Carl Mohr in 
‘Garden & Forest,’ June 18, 1890, p. 295, reproduced | in the 
‘Garden’ for July 5, 1890. 
70. P. ecHinata, Miller (1768) ; Sargent, Silva, xi. (1897) 
tab. 587; Britton § Brown, i. p. 58, fig. 116. 
P. mitis, Michaux (1803) et auctt. 
P. variabilis, Lambert (1803). 
? P. virginiana, B. echinata, Du Roi in herb. Linn. ! © 
A widely distributed species, occurring from New York to 
Florida, in Texas, Louisiana, and other Middle and Eastern 
American States. 
The leaves are 8-12 cent. long, slender, boat-shaped in section, 
with one layer of hypoderm ; cortical cells with infolded walls; 
resin-canals median, surrounded by a stereome-sheath; meristele 
elliptic ; endoderm-cells about 40, thickened on the outer side ; 
fibro-vascular bundle branched, with stereome-cells between the 
divergent branches. The buds are cylindric, acute; the male 
flowers in globose clusters. Cones shortly stalked or subsessile, 
spreading, 5-8 cent. long, oblong-conic. Apophysis slightly 
convex, keeled, 4-sided, upper border oblong, umbo with a 
minute reflexed mucro. Cotyledons 4-7. 
71. P. Laricro, Poiret (1804); Sargent, Silva, xi. (1897) 
p. 6, adnot.; Masters, in Gard. Chron. Jan. 18, 1884, p- 18, 
