34 KEY TO PLANTS. 
valvate ; in the latter case flowers her- 
maphrodite or stamens 5-10. Filaments 
nearly always unequal in length. 
Nyctagineae. 
38 (a) Stamens as many as the segments of the 
perianth and alternate with them, or 
more numerous. ‘Testa hard. Plants 
covered with stellate hairs or scales. 
Leaves entire. Style present. Seed 
with little ornoalbumen. Embryo with 
an inferior radicle. HKurope, Asia, 
Australia, North America. 
Elaeagnaceae. 
(4) Stamens as many as the segments of the 
perianth and opposite to them, or fewer. 
Testa membranous, coriaceous, or want-. 
ing. 39. 
39 (a) Ovary immersed at the base into a disc 
adnate to the perianth. Style wanting. © 
Seed without a testa, with copious al- 
bumen. Radicle of the embryo superior. 
Leaves entire or wanting. Perianth 
divided down to the disc into 4 or 5 
segments. Stamens inserted at their 
base. Australasia and South Asia. 
Santalaceae. 
(4) Ovary free. Style present. Seed pro- 
