24 FOUNDATIONS OF BOTANY 
Fie. 4.— Inflorescence, Flower, and Seed, of a Sedge. 
(Great Bulrush, Scirpus lacustris.) 
A, magnified flower, surrounded by a perianth of hypogynous bristles; B, the 
seed; C, section of the seed, showing the small embryo enclosed in the base 
of the endosperm. 
I. ARISAMA, Martius. 
Perennial herbs, springing from a corm or a_ tuberous 
rootstock. 
Spathe rolled up at base. Summit of spadix naked, the 
lower part flower-bearing; staminate flowers above, pistil- 
late ones below. Stigma flat; ovary 1-celled ; berry 1—-few- 
seeded. 
