TILIACEA. 483 
gynous (figs. 923 and 924), usually numerous (figs. 921-923), 
distinct (fig. 923) or polyadelphous (fig. 557); anthers 2-celled 
(figs. 525 and 922), opening longitudinally, or by pores at the 
apex. Disk glandular, hypogynous. Carpels 2—10, which are 
generally united so as to form a compound many-celled ovary 
(fig. 921), sometimes distinct ; placentas axile (fig. 921); style 
1 (figs. 922 and 923) ; stigmas equal in number to the carpels. 
Fruit dry or pulpy, sometimes samaroid, usually many-celled, 
or rarely 1-celled by abortion. Seeds solitary or numerous ; em- 
bryo erect, straight, in the axis of fleshy albumen ; cotyledons 
flat and leafy (jig. 764, c, c); radicle next the hilum. 
Diagnosis.—This order resembles, in many respects, the 
BxG.. 921. Fic. 923. 
Fig. 921, Diagram of the flower of the 
Lime.— Fig. 922. Vertical section 
of the flower of the same ( Tilia euro- 
pea). Fig. 923. Peduncle of the 
Lime, bearing two flower-buds and 
a fully expanded flower. 
Malvacez and Sterculiaceze. It may be at once distinguished 
from them by having a glandular disk, and by the stamens not 
being monadelphous; and from the Malvacez also, by the 
anthers being 2-celled. From all other Thalamiflorz the plants 
of this order may be known by their alternate simple stipulate 
leaves; valvate zstivation of calyx, which is also deciduous ; 
floral envelopes in 4 or 5 divisions ; stamens either distinct or 
polyadelphous ; anthers 2-celled; hypogynous glandular disk ; 
many-celled fruit with axile placentas; and embryo erect, 
straight, in the axis of fleshy albumen. 
Division of the Order and Illustrative Genera.—The order has 
been divided into two tribes, as follows :— 
112 
